Floyd|Snider Staff

To serve our outstanding client base, Floyd|Snider employs a versatile staff that works in an integrated and collaborative environment. Our qualified team brings a combination of proven technical expertise, professional maturity, and creativity to all our clients' projects.

For some projects, we believe that the strongest work products can be offered to our clients by effective teaming with other firms. We assemble and manage skilled project teams specific to each client by utilizing our knowledge of experienced and cost-effective local firms, and our large network of local, regional, and national experts. To learn more about individual staff members, please view the biographies below:

Allison Geiselbrecht, PhD
» View Bio

Allison Geiselbrecht is a doctored microbiologist with over 13 years experience coordinating projects involving interdisciplinary teams of scientists, engineers, and natural resource experts from study design and field work to agency reporting.

Allison assists industrial and municipal clients including ports, harbors, and waterway-based industries with technical evaluations, regulatory strategy analysis and development, and negotiations with governmental agencies. She has experience with investigations completed under Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), Resource Conservation  and Recovery Act (RCRA), and Washington State regulations including the Model Toxics Control Act, the Puget Sound Dredged Material Management Program and Washington State Sediment Management Standards.

Allison’s expertise is in the characterization of sediment and water chemistry and biodegradation of pollutants such as polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and pesticides. She has applied her chemistry and geochemistry knowledge to source control evaluations for operational facilities, evaluating waste streams most likely to cause environmental recontamination. She often assists clients with stormwater compliance, including source control and treatment technology evaluations, as well as litigation support for CWA lawsuits.

Allison has authored numerous scientific papers and is an industry expert on a variety of environmental chemistry topics. She holds a doctorate in Microbiology from the University of Washington, and an undergraduate degree in Biochemistry from Texas A&M University.

Amanda McKay, MS
Environmental Toxicologist
» View Bio

Amanda McKay joined the Floyd|Snider team in March 2009. She is an environmental toxicologist with 9 years experience whose primary expertise includes environmental organic chemistry and risk evaluation. Amanda has used her expertise for both uplands and marine/freshwater remediation and redevelopment projects. She has provided technical and critical analytical support to projects that include the development and implementation of sampling and analysis plans, remedial investigation/feasibility studies, data quality control review, and interpretation, research, and regulatory compliance. Amanda has also performed numerous field investigations in support of remedial investigation work, including groundwater, soil, stormwater, and sediment investigations. Additionally, Amanda has conducted and managed several human health risk assessments and has experience with ecological risk assessments. She is also skilled in the evaluation of risk assessment approaches.

Amanda holds a graduate degree (MS) in Environmental Toxicology from Cornell University, and an undergraduate degree (BS) in Biochemistry and Molecular Biology from the University of California at Davis.

Amanda Sweet
Administrative Assistant
» View Bio

Amanda Sweet provides client and administrative assistance at Floyd|Snider. A creative thinker and versatile problem solver, practiced at thriving in diverse, challenging work environments, she brings experience in marketing, event coordination, office administration, and teaching at the university level to her roles at Floyd|Snider. In addition to administrative work, Amanda also supports the technical editing team with document production and aids in managing Floyd|Snider’s online and physical library. She holds a master’s degree in Painting + Drawing from the University of Washington, and an undergraduate degree in Painting and a concentration in English from Rhode Island School of Design. Amanda’s passion for the environment is evident in both her artwork and her dedication to the firm’s mission.

Andrea Swanson
Document Format and Quality Specialist
» View Bio

Andrea Swanson joined the Floyd|Snider team in 2015 with over 10 years of experience in providing project support in the environmental consulting industry. As the Document Format & Quality Specialist, she works closely with the technical editor to ensure that every document produced for our clients meets the highest standards for quality and accuracy. Andrea also assists project teams with data presentation, graphics development, and document management. Her background in fine art gives her a unique perspective for visual presentation and a highly trained eye for detail. Andrea holds an undergraduate degree from the University of Washington and is a sculptor in her free time.

Brett Beaulieu, LHG
» View Bio

Brett Beaulieu is a licensed hydrogeologist, applied environmental geochemist, and project manager who provides contaminant fate and transport, remedial evaluation and design, and regulatory compliance expertise for uplands and marine sites. His experience includes designing and implementing in-situ remediation treatment for arsenic in groundwater; developing, implementing and evaluating hydrogeologic and geochemical pre-design studies and providing hydrogeologic and geochemical modeling analysis; developing investigation and remediation work plans and budgets; assessing client data needs and managing data acquisition, reporting, and regulatory compliance; preparing remedial investigation, feasibility study, remedial design, and other technical documents; and overseeing remedy implementation and construction.

Brett has developed substantial expertise in arsenic and metals geochemistry and fate and transport based on his investigation, modeling, research, and remediation experience. Brett is also experienced at providing client-tailored technical and historical research in support of strategic decision-making and litigation.  Brett holds a masters degree in geology from Vanderbilt University.

Michelle "Chell" Black
Data Manager
» View Bio

As Floyd|Snider’s database manager, Chell Black manages all the scientific data for the firm, transforming data sets received from laboratories into database-compatible components that can then be loaded into the firm’s proprietary database structure. From this database, she extracts the data into reports for use by project teams, ensuring data quality in the process. When necessary, Chell tunes the firm’s database systems for performance, capacity, and integrity.

Prior to Floyd|Snider, Chell spent 10 years as a 9-1-1 Dispatcher, experience which has served to hone her abilities to prioritize, multi-task, communicate efficiently, and meet deadlines. Her prior experience also includes maintaining a geographical database for a municipal Communications Center and training others in the use of Computer Aided Dispatch software. Chell holds an undergraduate degree in Physics/Computer Science, with a minor in Chemistry.

Corey Wilson, EIT
Environmental Engineer
» View Bio

Corey Wilson has over 5 years of experience in consulting as an environmental scientist/engineer. He provides technical support in various phases of environmental assessments, field investigations, contaminant source control, construction oversight, and treatment system operation and maintenance. His expertise includes contaminant fate and transport, water quality, environmental organic chemistry, and physical/chemical treatment processes. He plays a key role in developing and implementing sampling and analysis plans, quality assurance project plans, and health and safety plans for environmental investigations to identify and manage contamination in sediment, soil, and groundwater. Corey also has extensive experience conducting stormwater and storm drain sediment monitoring at National Pollutant Discharge Elimination System (NPDES) permitted industrial facilities in the Pacific Northwest.

Corey holds a master's in Civil and Environmental Engineering from the University of Washington, with a focus on water quality engineering, and an undergraduate degree in Environmental Studies from the University of Colorado, Boulder.

Emily Jones, PE
Environmental Engineer
» View Bio

Emily Jones holds a master's in Environmental Engineering and an undergraduate degree in Chemical Engineering from the University of Washington. She provides technical support in human health risk assessments, including ensuring regulatory compliance under the Resource Conservation and Recovery Act, Model Toxics Control Act, and other regulations. Her skills include analysis of complex data sets, fate and transport modeling, and historical industrial process research. Her research has been used in multi-party allocation processes to characterize the wastes generated at a site in order to delineate the client's liability and to identify other potentially liable parties.

Emily's expertise also includes National Pollutant Discharge Elimination System (NPDES) permit compliance. She has assisted numerous stormwater clients in the Puget Sound region develop Stormwater Pollution Prevention Plans and Spill Prevention, Control, and Countermeasure Plans to comply with both individual and industrial general permit requirements. Emily also provides strategic assistance to clients faced with citizen suits under the NPDES Program, and provides guidance to clients seeking to understand the financial and legal implications of changing stormwater regulations.

Erin Cosnowski
Environmental Chemist/Oceanographer
» View Bio

Erin Cosnowski is an environmental chemist who contributes her technical, research, communication, and critical analysis skills to tackle a broad range of complex environmental projects.

Her work involves conducting environmental site assessments and investigations, data interpretation, remedial action analysis, QA/QC review of laboratory data, and regulatory compliance evaluations. Erin’s experience has included environmental and regulatory compliance investigations in both upland and marine settings. She also has expertise in developing and implementing sampling and analysis plans and monitoring plans for sediment quality investigations. Erin holds a graduate degree (MS) in Chemical Oceanography from the University of Washington and an undergraduate degree in Chemistry from Whitman College.

Erin Murray
Environmental Scientist
» View Bio

Erin Murray is an environmental scientist with experience providing technical support in environmental investigation, remediation, and regulatory compliance for environmental cleanup and redevelopment projects under Model Toxics Control Act (MTCA), Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), and Resource Conservation and Recovery Act (RCRA). Erin has extensive experience developing and implementing strategic sampling and analysis plans and quality assurance project plans that maximize the use of the analytical budget, using tiered chemical analyses, and specifying data collection and laboratory methods that ensure reporting limits less than potential cleanup levels while achieving data quality objectives. Such investigations include sediment, groundwater, and soil sampling programs at sites impacted by various chemicals of concern. Erin also provides permitting and regulatory compliance support to secure federal, state, and local permits. She is also a skilled writer, assisting with and producing Sampling and Analysis Plans, Remedial Investigation/Feasibility Study (RI/FS) reports, Cleanup Action Plans, data reports, and construction and remediation completion reports. She is also skilled in data analysis and research.

Erin also supports Floyd|Snider's Geographic Information Systems (GIS) department, expanding the firm's capabilities to provide visually engaging graphics that allow for an intuitive comprehension of complex data trends. Erin has been with Floyd|Snider since 2003 and holds an undergraduate degree in Environmental Geography and Natural Resource Management from Western Washington University.

Gabriel Cisneros, LG
» View Bio

Gabriel Cisneros has over 11 years of experience as a registered Geologist. He provides support in various phases of environmental assessments, site investigations, soil vapor assessments, remedial investigations/feasibility studies (RI/FS), and cleanup action plans (CAPs). Gabriel has extensive experience with Washington State Department of Ecology's Model Toxics Control Act (MTCA) applied to upland soil, groundwater, and soil vapor.

Gabriel has experience in evaluating data gaps; reviewing soil, groundwater, and vapor data; conducting vapor intrusion assessments; calculating MTCA Method B and C cleanup levels for total petroleum hydrocarbons; running Johnson and Ettinger models to predict soil vapor risk to indoor air; developing site assessment activities; and writing work plans, RI/FS reports, and CAPs. Gabriel has extensive technical experience managing field work that consists of groundwater monitoring, groundwater well installation, soil borings (geoprobe, hollow-stem auger, sonic, and mud rotary), aquifer testing, contractor oversight, installing and operation and maintenance of multi-phase extraction systems and air-sparge systems, and conducting remediation activities via excavation. He has been successful in obtaining No Further Action (NFA) determinations with former Chevron retail and bulk terminal sites.

Gabriel holds a graduate degree (MS) in Structural Geology from the University of Washington and an undergraduate degree (BS) in Geology/Geophysics from the University of Arizona.

Gretchen Heavner, PhD, EIT
Environmental Engineer/Chemist
» View Bio

Gretchen Heavner is an environmental engineer/chemist who joined the Floyd|Snider team in 2013. She has 3 years of previous professional consulting experience with an environmental and geotechnical engineering firm in Anchorage, Alaska where she provided technical and field services for numerous projects at various locations in Alaska. Clients ranged from individuals and private businesses to municipal, state, and federal agencies. Projects included site characterization, groundwater and soil monitoring, and remedial activities. She has conducted 25 Phase I Environmental Site Assessments (ESAs), was involved in numerous Phase II field investigations in support of remedial investigation work (including groundwater, surface water, soil, sediment, and storm water), and was often involved in guiding the development of work plans and writing proposals. Additionally, she had responsibility for planning, staging, coordinating, and conducting remote site fieldwork, as well as conducting statistical analysis and interpretation of analytical data from laboratory analysis of soil, water, and sediment samples collected.

Gretchen holds a Ph.D. in Environmental Engineering from Cornell University, an M.S. in Civil Engineering with an Environmental Engineering focus from the University of Colorado, Boulder, and an undergraduate degree (B.S.) in Chemistry from the University of Puget Sound. Her research at Cornell focused on development and analysis of DNA, RNA, and proteomic biomarkers as methods for assessing bioremediation of chlorinated compounds at field sites. Gretchen has experience in both field and laboratory settings with the collection and analysis of surface water, groundwater, and soil samples. She is skilled in research, technical writing, and data quality control, and has developed extensive analytical and problem-solving skills.

Jason Taylor
GIS/Data Specialist
» View Bio

Jason Taylor joined the Floyd|Snider team in 2012 and primarily works to assist both Geographic Information System (GIS) and database efforts. Mr. Taylor is one of the firm's two GIS analysts and has 5 years of professional experience. Besides being an expert ArcGIS user, he also possesses advanced skills programming SQL, Python, and R. Mr. Taylor also has a background in data collection and processing for water quality analytes in a state accredited laboratory, instrument calibration and maintenance, and quality assurance/quality control (QA/QC) practices. These additional skills and experiences give him unique insight into both his data and GIS work. Mr. Taylor holds an undergraduate degree in Environmental Science with a minor in GIS from Western Washington University.

Jessi Massingale, PE
» View Bio

Jessi Massingale is a professional civil/environmental engineer and oceanographer with investigation, strategy, and permitting and regulatory compliance expertise for marine/freshwater and upland remediation and redevelopment projects. Jessi has applied her expertise to projects that include sediment remedial design evaluation and cap modeling, environmental and civil engineering design, water quality monitoring, remedial investigations and feasibility studies, the assembly of conceptual and design-level cost estimates, and agency negotiations and permitting. Jessi has a strong knowledge of coastal processes and their relationship to nearshore chemical and biological conditions. Jessi is experienced also with environmental chemistry and related microbial processes, water quality, and chemical analyses, using a wide array of laboratory analytical tools and methods.

Jessi is experienced in uplands and sediment field data collection, data analysis and interpretation. Jessi has applied this experience to a number of sediment and upland-based habitat restoration, environmental contamination, source control, and research projects. Jessi has planned and implemented sediment investigations in fresh water and marine locations in Washington and Oregon, reported the results, and assisted clients in negotiating the outcomes with Washington State Department of Ecology, Oregon Department of Environmental Quality, U.S. Environmental Protection Agency, and various Trustee groups. Jessi has an exceptionally strong reputation and close working relationship with these agencies in negotiating permit requirements, as well. Jessi holds a graduate degree (MS) in Civil and Environmental Engineering and undergraduate degrees in Oceanography and Zoology from the University of Washington.

Kate Snider, PE, RLA
» View Bio

Kate Snider is a professional civil engineer and registered landscape architect with over 26 years experience in site engineering and site cleanup. Kate’s strengths and reputation are in management of complex project teams, agency negotiations, multi-party facilitation and strategy development for cost-effective remedial design coupled with design for future redevelopment. Kate is a certified mediator and has significant skills in facilitating diverse or multi-jurisdictional teams to reach solutions optimizing group objectives.

Kate has been one of the leaders in developing and implementing area-wide solutions to contaminated site management, both in upland and aquatic environments. She has played an important role in many of the precedent-setting Brownfield projects in the Pacific Northwest.

Several of Kate’s recent projects have involved the facilitation and management of complex environmental issues for multi-party groups. Such projects have included facilitating the multi-party Sediment Phthalate Work Group as well as supporting the Dredged Management Material Program agencies to elicit stakeholder input and determine an updated framework for open-water disposal of dredged material containing dioxins.

During the last several years Kate has also managed multi-disciplinary teams to conduct investigation and remediation of contaminated sediment sites under Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and Model Toxics Control Act (MTCA). Kate managed design and construction for Todd Pacific Shipyards to remediate marine sediments, soil, and groundwater at the Todd portion of the Harbor Island Superfund Site, and to construct nearshore aquatic habitat. For the City of Seattle, she also manages the Remedial Investigation and Feasibility Study for the cleanup of the Gas Works Sediment Area in North Lake Union.

Kate holds an undergraduate degree in Civil Engineering and a graduate degree in Landscape Architecture (MLA) from Cornell University.

Ken Preston
Constructability Specialist
» View Bio

Ken Preston brings over 30 years of experience in construction estimating, negotiations, and construction supervision for innumerable waterfront development and remediation projects, including sediment remediation, offshore outfalls and intakes, harbor facilities, dredging work, marinas, breakwaters, and shoreline protection projects.

Ken holds a BA in Geology, and has worked with General Construction, now Kiewit, since 1976. Upon leaving the company in 2012, he had served as a senior estimator, branch manager, project manager, project superintendent, and field engineer. Ken has strong relationships and an exceptional reputation with engineers, owners and contractors throughout the Pacific Northwest, based on practical and innovative construction solutions implemented with collaborative spirit and good humor.

From Floyd|Snider, Ken provides constructability consulting services to waterfront landowners, architect/engineering firms, and environmental consulting firms. He offers these services as an independent line of business, in addition to consulting on Floyd|Snider cleanup and redevelopment projects. His services include constructability and project strategy review and input, design level cost estimating, construction document review, and participation in regulatory negotiations relative to constructability and project strategy.

Kim Rodgers
GIS/Data Specialist
» View Bio

Kim Rodgers joined Floyd|Snider in 2016 as a GIS Specialist with research experience in GIS, data analysis, and cartographic-based communication for environmental management. Kim specializes in the creation of visually engaging graphics, efficient communication of intended messages, presentation of complex analytic procedures and results, and data management procedures to ensure data integrity. Kim is a member of the Historical Research team, where she contributes to a range of projects, including site history assessment, land use and operational history, and the historical reconstruction of stormwater systems and drainage basin configurations. Her previous research experience includes risk assessment, decision support, and communication related to impacts of climate change on coastal ecosystems and stormwater systems. Kim holds a graduates degree (MS) in Geography from the University of South Carolina, a GIS Certificate from Penn State, and an undergraduates degree (BS) in Geology from Bates College.

Kristen Legg
Managing Editor
» View Bio

As Managing Editor, Kristen Legg works to ensure consistency, accuracy, and overall quality in all Floyd|Snider documents. Kristen interacts closely with project teams on all deliverables, aiding in developing and meeting internal deadlines, as well as coordinating with the rest of the technical editing team. She works closely with project managers, technical staff, and clients to produce high quality and visually engaging documents. Kristen also plays a key role in Floyd|Snider marketing efforts, developing concise, powerful proposals and announcements. Kristen holds an undergraduate degree (BFA) from Western Michigan University and a Certificate in Editing from the University of Washington.

Kristin Anderson, LG
» View Bio

Kristin Anderson is a geologist who joined the Floyd|Snider team in 2010. Kristin is highly skilled in planning and managing field investigations, conducting field sampling, coordinating laboratory services, and data management. Her expertise includes the use of statistical methods to interpret and identify trends in complex environmental data. She has written various technical documents, including Environmental Site Assessments (ESAs), Sampling and Analysis Plans (SAPs), Remedial Investigation/Feasibility Study (RI/FS) reports, data reports, and construction and remediation completion reports. She has also assisted with research for permitting, white papers, and other technical documents. Kristin also helps to manage and maintain the company field equipment and resources, and also manages and tracks the companies health and safety program. Kristin holds an undergraduate degree in Geology & Geophysics from Yale University.

Layni Wachter
Environmental Engineer
» View Bio

Layni Wachter is an environmental engineer with 1 year of experience in construction oversight and management assistance on projects involving upland and in-water remediation/restoration. Layni has been involved in the coordination, scheduling, and quality control of construction activities including excavation, grading, compacting, trenching, sheet pile installation, dewatering, and revegetation. Through her previous work, Layni has gained expertise in balancing the schedule demands of a project with subcontractor, material, and crew availability; working under design specifications and making in-field design changes due to unforeseen circumstances; designing systems to track costs and quality control through different phases of the project; interfacing with clients, consultants, and contractors; and complying with National Pollutant Discharge Elimination System permits and regulatory agency requirements. Layni holds an undergraduate degree in Environmental Engineering with a minor in Applied Ecology from the University of Colorado, Boulder.

Lisa Meoli, MA
Environmental Historian
» View Bio

Lisa Meoli is an environmental historian with 15 years of experience providing technical support in historical and litigation research, cultural resource management, and environmental investigation. Ms. Meoli has conducted a diverse range of historical research projects, including local site histories, historic land use, corporate and environmental history of industrial facilities, corporate ownership changes, and operational and production history of industrial facilities. Ms. Meoli also has completed several projects involving potentially responsible party (PRP) identification for contaminated sites and due diligence assessments. Ms. Meoli has conducted extensive archaeological survey and excavation projects for public and private companies in collaboration with federal and tribal governments in the Midwest and Pacific Northwest. She holds a Master's in Public History.

Ms. Meoli is also an environmental scientist and provides technical support related to project management, environmental regulations, and investigations. Ms. Meoli has extensive experience on projects involving environmental contamination and remediation, due diligence assessments, and environmental compliance. She has performed numerous upland soil and groundwater investigations and has extensive experience in all aspects of environmental drilling and sampling, as well as construction oversight for remedy implementation.

Lynn Grochala
Environmental Scientist
» View Bio

Lynn Grochala is an Environmental Scientist with over 15 years of experience in the private environmental consulting industry with a focus on environmental site assessments, subsurface investigations, environmental data collection and interpretation, remedial action oversight, and regulatory compliance. She has completed and managed a variety of field activities, including: remedial system pilot testing, construction oversight, operation and maintenance, and compliance sampling; soil boring and monitoring well installation oversight; soil, sediment, surface water, and groundwater sampling; soil gas surveys and indoor air sampling; hydraulic conductivity testing; soil excavation oversight; tank removal oversight; and emergency response and assessment.

Lynn has extensive experience managing environmental assessment and cleanup projects, providing regulatory compliance assistance for a variety of client types, and preparing technical reports.  She also has extensive experience completing subsurface investigations to delineate and characterize contaminant plumes for sites impacted with petroleum hydrocarbons and/or chlorinated solvents. She has vast experience designing and conducting oversight for remedial actions that include soil vapor extraction, air sparging, in-situ chemical oxidation, and groundwater extraction and treatment. 

Lynn holds an undergraduate degree in Environmental Studies from the State University of New York (SUNY) at Buffalo.

Megan King, PE
Environmental Engineer
» View Bio

Megan King is a professional environmental engineer experienced in uplands and in-water hazardous waste remediation. Her 12 years of technical and project management experience have been applied to various types of environmental cleanup projects and she has performed consulting services for a variety of clients, including private sector companies, and local and federal agencies. Megan has extensive experience in projects that include dioxins/furans contamination,  the development of Remedial Investigation/Feasibility Studies, remedial design, and construction document development. Megan is also an experienced facilitator, assisting groups with long-term planning, departmental reorganizations, and team-building. Her skills include field data collection, data analysis, construction management, remedial design and implementation, strategic planning, and agency and stakeholder negotiations.

Megan has worked extensively with the Model Toxics Control Act and its application to contaminants in soil, sediment, and groundwater. Megan holds an undergraduate degree in Civil Engineering from the University of Portland, and a Professional Engineering license in the state of Washington.

Pamela Osterhout, GIT
» View Bio

Pamela Osterhout is a geologist with 1.5 years of experience as a treatment technician and a field assistant. She is experienced in stormwater treatment, including chitosan and CO2 technologies. She has broad field experience including: stream, landslide, and hillslope surveying; identifying rule-identify landforms both remotely and in the field; collecting and describing core samples by hand auger, push probe, vibracore, and sonic drilling methods; and provenance determination for the Puget Sound region. In the past, she has assisted in the field collecting samples, sieving, and observing and recording Mount St. Helens pyroclastic density flow deposits from the May 18, 1980 eruption in Washington State. During that time Pamela analyzed grain composition and size distribution, and published work on the subject. Pamela holds a master’s in Applied Geology, and an undergraduate degree in Geology and Mathematics, both from the University of Washington.

Rachael Carleson
» View Bio

Rae Carleson manages the billing process, from project setup through project completion as part of Floyd|Snider's accounting team. With her rich background in customer service, Rae provides thoughtful assistance to clients with billing questions and customizes invoices to meet project and client needs. A strong attention to detail provides for accurate tracking of accounts and for delivery of thorough work products in an efficient manner. Rae brings with her a thoughtful approach to building strong working relationships with clients and coworkers.

Stephen Bentsen, PE
Environmental Engineer - Associate Principal
» View Bio

Stephen Bentsen is a civil/environmental professional engineer with 13 years experience providing expertise for a range of projects at Floyd|Snider. Stephen specializes in stormwater regulation compliance and treatment, marine/waterfront sediment and uplands remediation, and construction management. He is experienced in the design of light non-aqueous phase liquids (LNAPL) recovery systems, remediation plans, stormwater quality and quantity treatment systems, preparation of remedial investigations, feasibility studies, sampling and analysis plans, and detailed hydraulic reports.

Stephen has applied his technical experience to a wide range of the remediation and engineering aspects of projects, including both uplands and sediment/waterfront remediation design, construction management on dredging and restoration projects, operation and maintenance of bioremediation treatment cells, gathering topographical and geographical statistics, and historical stormwater conveyance system research. Stephen has provided expertise and project management to complex projects involving multiple regulatory agencies and organizations. His familiarity with regulatory guidelines and regulations, and his attention to detail enable him to identify problem areas and assist with finding solutions for environmental challenges.

Stephen has additional experience with analysis of stormwater runoff using modeling programs including StormShed, MGSFlood, and CAiCE Visual Drainage, and contaminant modeling in soil and groundwater using programs including BIOSCREEN, SESoil, and AT123D. Stephen holds an undergraduate degree in Civil/Environmental Engineering from Seattle University and an undergraduate degree in Legal Studies from State University of New York (SUNY) at Buffalo.

Steve Reimers, PE
Civil Engineer
» View Bio

Steve Reimers is a professional civil engineer with over 29 years of engineering and construction experience. Steve's unique background in both consulting engineering and heavy civil construction allows him to bring a balanced perspective and comprehensive set of management skills to a wide variety of civil and environmental projects. He is an experienced and successful manager of large-scale mixed-use commercial real estate projects, contaminated property remediation and redevelopment projects, and heavy civil and geotechnically challenging projects. Steve has provided engineering and strategy for projects involving upland cleanup and redevelopment, sediment remediation, and construction projects for numerous industrial, municipal, and governmental clients. He is a resourceful negotiator and liaison, working closely with regulatory agencies to resolve intricate permitting issues related to historical practices, property purchase and redevelopment, and current operations. He has significant experience supervising and coordinating complex construction management efforts including project planning, critical path scheduling, construction cost estimating, technical submittal preparation and review, construction contract procurement and administration, and change order negotiation.

Steve is an on-call engineer at Floyd|Snider, participating in project strategy development, construction document QC, construction contracting, constructability analyses, and cost estimating. Steve holds an M.S. in Construction Management and Geotechnical Engineering from the University of California-Berkeley and a B.S. in Civil Engineering from the University of Colorado.

Talia Mathews, MLS
Research Librarian
» View Bio

Talia Mathews is a science and engineering librarian with 9 years of experience providing research, investigative analysis, and information management for a diverse array of environmental projects. Ms. Mathews has conducted extensive research into the land use, chain of ownership, regulatory histories, and environmental histories of contaminated sites, and has experience conducting both online and traditional research in government, technical, and university libraries. Ms. Mathews also manages the digital library and metadata workflows at Floyd|Snider, maintains the firm’s internal library website, and contributes her technical expertise to the creation of project-specific electronic document repositories for both in-house and client use.

Prior to working for Floyd|Snider, Talia in turn worked as a field biologist, owned and operated an organic vegetable farm, and gained valuable experience at the Washington State University Energy Program Library. Talia holds an undergraduate degree (BS) in Environmental Studies from The Evergreen State College and a graduate degree (MLS) in Library Science from Clarion University of Pennsylvania.

Teri Floyd, PhD
» View Bio

Dr. Teri Floyd is a professional chemist with over 20 years experience in environmental systems analysis.

Teri specializes in complex project management for sites and projects with interwoven regulatory, business, and technical challenges, often crafting creative "out-of-the-box" solutions predicated on sound science and an understanding of business and regulatory processes. Because Teri believes that creative ideas are only as good as their implementation and outcome, she works with her clients from early planning through implementation and closure. Teri uses these skills at upland and sediment sites throughout the country, primarily here in the Northwest.

Teri is particularly skilled in the management of complex environmental issues for multi-party groups. She has an exceptional ability to work with multiple parties to define project approach strategies that are robust in their attention to multiple objectives, technical detail, and scientific grounding. She is an excellent negotiator and manager, especially for those projects that must be completed against a backdrop of changing regulatory climates, client needs, or site conditions.

Over the years, Teri has worked on almost 20 landfill cleanups and/or closures.  She has managed all phases of the process from early investigations, through remedial investigations and feasibility studies, landfill closure plans, closure design and permitting, construction management, and post-closure monitoring.  She is currently leading the team that is performing closure and groundwater remediation of B&L Landfill in Washington State—a wood waste landfill containing Asarco slag that is leaching arsenic at high concentrations into nearby wetlands.

In addition to landfill projects, other Resource Conservation and Recovery Act (RCRA) work includes technical and strategic integrations of the uplands and in-water portions of the RCRA cleanup of Boeing’s Plant 2 on the Duwamish Waterway, and a number of hazardous waste designation issues involving the more esoteric aspects of waste designation, including ignitability, reactivity, and derived-from wastes.

Teri also works in the aquatic environment, especially in urban ports.  She is one of the leading experts on the behavior of wood in the marine and freshwater environments, where she has performed numerous investigations, led the cleanup for the Wood Debris Group in Commencement Bay, established testing protocols in Washington and Alaska, and testified in court. Because wood is often a deleterious substance rather than a hazardous or toxic substance, Teri has also developed a solid working understanding of how various regulations, including the Clean Water Act, and various state laws deriving from the Clean Water Act can be used to manage cleanup decisions. 

Terry Duncan
Client Support
» View Bio

Since joining Floyd|Snider in 2005, Terry Duncan provides an exceptional new level of client care and an energetic approach to assistance in all aspects of the company. Terry came from an Architectural/Engineering firm where she gained 20 years of industry experience, including client support, project assistance, and accounting assistance. She effectively manages the needs of multiple clients and internal staff in a prompt, concise, and enjoyable manner. Skilled at handling multiple roles at one time, Terry’s detail-oriented support is crucial to the accomplishment of company objectives. In a client and management support role, Terry assists in numerous aspects of company projects, including coordinating meeting arrangements, routing communications, and responding to client inquiries. Terry’s spirited personality and impressive communication skills provide an excellent level of customer service. Additionally, she is an integral part of the accounting team, and coordinates the operations of the Floyd|Snider office.

Tessa Gardner-Brown, AICP
Senior Environmental Planner
» View Bio
Tessa Gardner-Brown joined Floyd|Snider in 2015 as a Senior Environmental Planner and brings a strong background in environmental planning and permitting. She has held key positions on two of Seattle's major infrastructure projects in this capacity, including the State Route 520 Bridge Replacement Project and the Elliott Bay Seawall Project.

Tessa contributes to complex planning processes by preparing defensible NEPA and SEPA documents, providing oversight and direction for technical studies, and developing briefing memos to assist in external proceedings. Tessa's ability to extract conclusions from extensive technical materials and prepare concise summary documents aids in strategy development or issue clarification in early project phases.

Tessa uses her working knowledge of local, state and federal regulations to develop strategic project approaches and to assist in the identification of project opportunities and risks. She is experienced in preparing comprehensive permit applications (ranging from shoreline substantial development permits to JARPAs), engaging in negotiations from initiation to issuance and close-out, developing interactive commitment tracking databases, and ensuring regulatory compliance during construction.

Tessa holds an undergraduate degree in Environmental Policy and Planning from Western Washington University. She is a member of the American Planning Association and is certified through the American Institute of Certified Planners (AICP).

Tiffany Volosin
Chief Financial Officier
» View Bio

Tiffany Volosin is a resourceful financial manager with 15 years experience in accounting and financial management systems, and in overall company operations. Tiffany is a key member of the executive management team at Floyd|Snider.  As CFO, she works with the Principals and Associate Principals to guide the firm's growth and business strategies, risk management, hiring, benefits, and operations. 

Before joining Floyd|Snider in 2004, Tiffany spent several years specializing in start-up companies and assisting them with the complex challenges of building financial systems, improving operational efficiency, and managing cash.  By beginning her career in such volatile companies, Tiffany gained very valuable experience in all aspects of running a successful business, and enjoys contributing to the operations at Floyd|Snider.  She holds an undergraduate degree (BS) in Accounting and Business Management from the University of Puget Sound.

Tom Colligan, LHG
Hydrogeologist - Associate Principal
» View Bio

Tom Colligan is a licensed hydrogeologist and geologist with more than 20 years experience managing and conducting hazardous waste site investigations and cleanups for commercial and industrial clients. He is adept at implementing and managing all aspects of site investigations and feasibility studies, with particular expertise in conducting field invesitgationsand evaluating the resulting site characterization data to identify practical and cost-effective remediation alternatives in accordance with Washington State Model Toxics Control Act (MTCA) and federal Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) regulations.

Tom’s technical expertise has been applied to sites contaminated with chlorinated solvents, creosote and coal tar, heavy metals, polycyclic aromatic hydrocarbons (PAHs), pesticides, and polychlorinated biphenyls (PCBs) at defense installations, industrial facilities, and waterways and ports throughout the Northwest. He is particularly experienced in remediation of contaminated groundwater and soil using a variety of methods including enhanced reductive dechlorination, in-situ chemical oxidation and reduction, soil vapor extraction, air sparging, dual phase recovery, barrier walls, thermal remediation, pump and treat, bioventing, land farming, excavation, capping, and natural attenuation. Tom has also worked on numerous projects involving stormwater source control and stormwater contaminant remediation. His understanding of industrial processes and his practical, cost-effective approach to project management enable him to provide exceptional environmental expertise and regulatory support to achieve client objectives. Tom holds a graduate degree in Geological Sciences from the University of Washington and an undergraduate degree in Earth and Space Science from Stony Brook University and is a licensed hydrogeologist in the State of Washington.