Eric Suchomel, Ph.D., P.E.

Eric Suchomel is a Principal Environmental Engineer based in California with more than 15 years of academic and professional experience focused on remedial program management, site investigation and characterization, feasibility…

James Stout, BCES

Jim Stout is a Senior Principal Environmental Scientist based in Texas with more than 31 years of experience focused on the effective management of environmental remediation projects for private and…

Scott Struck, Ph.D.

Scott Struck is a Principal based in Colorado with more than 15 years of experience focused on planning, design, and implementation of stormwater infrastructure and watershed management to meet drainage…

Ken Susilo, P.E., CPSWQ

Ken Susilo is a Senior Principal Water Resources Engineer based in California with more than 20 years of experience focused on urban stormwater management. Ken specializes in the development of…

Gordon Thrupp, Ph.D., P.G., CHG

Gordon Thrupp is a Principal Hydrogeologist based in California with more than 25 years of experience focused on evaluating geological and hydrogeological conditions. He has specialized in quantitative analysis of…

Eric Tollefsrud, P.G.

Eric Tollefsrud is a Principal Hydrogeologist based in Minneapolis with more than 25 years of environmental consulting experience focused on the characterization and remediation of soil, soil vapor, and groundwater…

Keith Tolson, Ph.D.

Keith Tolson is a Senior Principal Environmental Scientist based in Florida with more than 15 years of experience focused on environmental sciences. He Specializes in the application of risk-based principles…

Denise Tripp

Denise Tripp is a Senior Consultant based in Massachusetts with more than 30 years of experience focused on environmental assessment and remediation and litigation support projects for the paper, petroleum,…

Paul Tschirky, Ph.D., P.Eng, D.CE

Paul Tschirky is a Senior Principal Coastal Engineer based in Louisiana with more than 20 years of experience in coastal resiliency, restoration, and water management.

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,…

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,…

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 and sediment investigation and remediation…

Joe Volpe, P.G.

Joe Volpe is a Principal Hydrogeologist based in Georgia with more than 30 years of diverse experience in all aspects of water management.

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

James (Yu-Sheng) Wang is a Principal Environmental Engineer based in Maryland with more than 18 years of experience focused on developing and applying innovative assessment and remediation technologies. James has…

Gary Wealthall, Ph.D.

Gary Wealthall is a Senior Principal Consultant based in United Kingdom with more than 25 years of experience focused on contaminant hydrogeology research and practice. He advises regulatory authorities and…

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 Welt, M.P.H., P.E.

Susan Welt is a Principal based in Massachusetts with almost 20 years of experience focused on the investigation and remediation of industrial sites, former manufactured gas plants (MGP), mining operations,…

Chuck Whisman, P.E.

Chuck Whisman is a Senior Principal Engineer based in Pennsylvania with more than 26 years of professional experience focused in the areas of soil and groundwater assessment/remediation, system optimization, compliance,…

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.

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 25 years of experience focused on the characterization and remediation of soil and groundwater contamination at industrial…

Matthew Wissler, P.G.

Matt Wissler is a Principal Hydrogeologist with more than 14 years of experience focused on the evaluation of water resources, hydrogeologic investigations relating to resource and waste permitting, and contaminated…

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 20 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.

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…
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