Eryn Torres

Eryn Torres is a Senior Professional based in California with ten years of experience focused on subsurface analysis, including geological, hydrogeological, and chemical evaluations to support remediation, groundwater sustainability, and…

Denise Tripp

Denise Tripp is a Senior Consultant based in Massachusetts with more than 35 years of experience focused on environmental assessment and remediation and litigation support for clients in the paper,…

Jeffrey Tyburski, P.G.

Jeffrey Tyburski is a Principal Geologist based in North Carolina with more than 32 year of experience focused on environmental brownfields redevelopment solutions to support property due diligence and acquisition,…

Thomas Vainio-Mattila, PGeo., EurGeol.

Thomas Vainio-Mattila is a Principal Environmental Consultant based in Ireland and with more than 25 years of experience focused on environmental consulting in Ireland, the UK and Germany.

Colette Van Straaten, EI

Colette Van Straaten is a Project Engineer and Sustainability Specialist based in Colorado focused on environmental engineering, sustainability initiatives, Environment, Social, Governance (ESG) strategy and reporting, and life-cycle water projects.

Lisa Van Tassell, P.E.

Lisa Van Tassell is a Senior Principal Environmental Engineer based in California with more than 15 years of experience focused on soil and groundwater remediation systems; site investigation and characterization,…

Matt Vanderkooy, P.Geo

Matt Vanderkooy is a Senior Contaminant Hydrogeologist based in Ontario with more than 10 years of experience focused on complex multidisciplinary challenges with a specialization in managing and directing per-…

Jesse Varsho, P.E., P.G.

Jesse Varsho is a Principal Engineer and Geologist based in Illinois with more than 19 years of experience in environmental consulting, landfill engineering, construction quality assurance, permitting, compliance, and project…

Robert Veenstra

Robert Veenstra is a Principal Environmental Consultant based in Missouri with more than 30 years of experience focused on developing and managing complex soil, groundwater, surface water and sediment investigation…

Berend Velderman, P. Geo

Berend Jan Velderman is a Senior Consultant based in Ontario with more than 30 years of experience in a variety of environmental projects including assessment and remediation of contaminated sites,…

Scott C. Walker

Scott Walker is a Principal Ecologist based in Texas with more than 22 years of experience in project management, environmental impact assessment, ecological restoration, and environmental permitting and planning.

Annika Wallendahl, P.E., L.G., M.B.A.

Annika Wallendahl is a Principal Engineer based in Washington with more than 20 years of experience focused on energy transition, environmental compliance, sustainability, and environmental engineering.

James Wang, Ph.D., P.E.

James (Yu-Sheng) Wang is a Principal Environmental Engineer based in Maryland with more than 23 years of experience focused on developing and applying innovative assessment and remediation technologies. James has…

Kevin M. Warner, P.E.

Kevin Warner is a Principal Engineer based in Florida with more than 35 years of experience designing and implementing soil and groundwater treatment systems at hundreds of sites throughout the…

Gary Wealthall, Ph.D.

Gary is the Managing Director of Geosyntec’s consulting business in the UK and Ireland. He is a Senior Principal with more than 25 years of experience in contaminant hydrogeology research…

Nandra Weeks, P.E.

Nandra Weeks is a Senior Principal Environmental Engineer based in Florida with more than 30 years of professional experience focused on the engineering and remediation issues associated with environmentally-impaired property…

Susan B. Welt, M.P.H., P.E.

Susan Welt is a Principal Engineer based in Massachusetts with more than 20 years of experience focused on the investigation and remediation of industrial sites, mining operations, and U.S. Department…

Chuck Whisman, P.E.

Chuck Whisman is a Senior Principal Engineer based in Pennsylvania with more than 27 years of professional experience helping his clients with their most challenging engineering, site development, and environmental…

Jimmy Whitmer, P.G., CHMM

Jimmy Whitmer is a Senior Principal Geologist and Hydrogeologist based in Georgia with more than 30 years of experience directing multidisciplinary projects focused on water supply development, site characterizations for…

Anju Wicke

Anju Wicke is a Senior Principal Scientist based in California with more than 25 years of experience in environmental consulting focused on program management, financial management, and contracting services for…

Jennifer Wilkie, Ph.D., P.E., BCEE

Jennifer Wilkie is a Principal Engineer based in Illinois with more than 20 years of experience in environmental research and consulting focused on providing multidisciplinary services and support to clients.

Kim Williams, P.E., CPSWQ

Kim Williams is a Senior Consultant Water Resources Engineer based in California with more than 25 years of experience focused on civil and environmental engineering.

Sam Williams, P.G., CHG

Sam Williams is a Senior Principal Hydrogeologist based in California with more than 35 years of experience focused on the characterization and remediation of soil and groundwater contamination at industrial…

Matthew Wissler, P.G.

Matthew Wissler is a Senior Principal Hydrogeologist with more than 19 years of experience focused on the evaluation and permitting of water resources, hydrogeologic investigations relating to resource and waste…

Veryl Wittig, P.G., CHG

Veryl Wittig is a Senior Principal Hydrogeologist based in California with more than 25 years of experience focused on complex environmental site assessment, landfill and waste management facilities, hazardous materials…

Jim Wragg, FGS

Jim Wragg is a Senior Principal Hydrogeologist based in the United Kingdom with more than 30 years of experience focused on the detailed investigation, assessment and remediation of contaminated soil…

Kenneth Yass, P.E., CHMM

Ken Yass is a Principal Environmental Engineer based in Wisconsin with more than 25 years of experience focused on environmental compliance services for a wide range of industrial clients.

Nicholas Yafrate, Ph.D., P.E.

Nick Yafrate is a Principal Engineer based in Massachusetts with more than 11 years of experience in geotechnical engineering design, geotechnical instrumentation, and solid-waste facility services.

Jessica Yeager, P.E., LSP

Jessica Yeager is a Principal Environmental Engineer based in Kansas with more than 11 years of experience focused on strategic, risk-based closures and complex remedial design for legacy and brownfield…

Jeremy Yeglin, P.E.

Jeremy Yeglin is a Principal Engineer based in Texas with more than 14 years of consulting experience focused on providing multi-disciplinary engineering and environmental solutions to his clients in the…

Peter Zeeb, Ph.D., P.G., LSP

Peter Zeeb is a Senior Principal Hydrogeologist based in Massachusetts with more than 25 years of experience focused on investigation and remediation strategy at some of the most challenging sites…

Michael Zylich, P.G., LSP

Michael Zylich is a Senior Consultant based in Wilmington, North Carolina with more than 27 years of experience focused on construction environmental site compliance and soil/groundwater management, natural resource permitting,…
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