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Jamey Rosen, P.Geo.

Jamey Rosen is a Senior Principal Geoscientist based in Ontario with more than 20 years of experience focused on Geospatial Information Management System design and development. Jamey has built systems…

Gregory Roush, P.G.

Gregory Roush is a Senior Principal Geologist based in Georgia with more than 30 years of experience focused on directing multi-disciplinary projects involving site assessments and corrective actions at industrial…

Scott Rowlands, P.G., CEG, CHG

J. Scott Rowlands is a Principal Hydrogeologist based in California with more than 30 years of experience focused on environmental and geotechnical consulting.

Paul Sabatini, Ph.D., P.E., D.GE

Paul Sabatini is a Senior Principal Engineer based in Illinois with more than 26 years of experience focused on the analysis, design, and inspection of anchored walls, landslide stabilization systems,…

Eric Sager, P.G.

Eric Sager is a Senior Principal Geologist based in Florida with over 22 years of experience working collaboratively to build project teams that solve complex problems and meet client expectations.

Rodolfo Sancio, Ph.D., P.E., D.GE

Rodolfo Sancio is a Senior Principal Geotechnical Engineer based in Texas with more than 20 years of experience focused on geohazard management (i.e., identification, characterization, and mitigation of geohazards), geotechnical…

Thierry Sanglerat, P.E.

Thierry Sanglerat is a Senior Principal Civil Engineer based in California with more than 30 years of consulting experience focused on groundwater and soil remediation, brownfield site redevelopment, waste management,…

Christopher Saranko, Ph.D., DABT

Christopher Saranko is a Principal Senior Board-Certified Toxicologist based in Georgia with more than 15 years of experience focused on evaluating potential risks associated with exposures to chemicals in the…

Daniel Schauer, P.G.

Daniel Schauer is a Senior Principal Geologist based in Florida with more than 35 years of geological, hydrogeological, and geotechnical engineering consulting experience focused on multidisciplinary engineering contracts for federal,…

John Seymour, P.E.

John Seymour is a Senior Principal Civil Engineer based in Illinois with more than 40 years of experience focused on site remediation, deep foundation engineering, and construction management. His clients…

Scott Sheridan, P.E.

Scott Sheridan is a Senior Principal Civil and Geotechnical Engineer based in Virginia with more than 15 years of experience focused on providing professional engineering, construction management, and consulting services…

David Sherman, P.G.

Dave Sherman is a Senior Geologist based in Pennsylvania with more than 20 years of environmental consulting experience focused on site investigation, groundwater assessment and remediation, and vapor intrusion (VI)…

Saverio Siciliano, P.G., C.E.G.

Saverio Siciliano is a Principal Consultant based in California with more than 20 years of experience in geo-engineering focused on solving municipal and private client's problems dealing with site subsurface…

Andrea Siefers, P.E.

Andrea Siefers is a Project Engineer based in North Carolina with more than 10 years of consulting and regulatory experience focused on air quality permitting, compliance, carbon management, and greenhouse…

Eric Smalstig, P.E.

Eric Smalstig is a Senior Principal Engineer based in California with more than 25 years of environmental consulting experience focusing on industrial facilities (production and waste management) assessment and remediation,…

Alicia C. Smith

Alicia Smith is a Senior Principal based in Texas with more than 20 years of environmental, health, safety, and sustainability (EHSS) experience focused on capital project development, merger and acquisition…

Brian Smith

Brian Smith is a Senior Environmental Consultant based in Utah with more than 18 years of professional experience focused in site investigation and remediation, due diligence, environmental compliance and permitting.

Kenneth J.K. Smith, P.G.

Ken Smith is a Senior Principal Hydrogeologist based in Pennsylvania with more than 33 years of experience managing client liabilities and remediation in multiple states and under varying regulatory conditions.Recently,…

Garry Stanley, P.G.

Garry Stanley is a Principal Geologist Consultant based in Illinois with more than 20 years of environmental consulting experience focused on site investigation, groundwater assessment and remediation, and vapor intrusion…

Poppy Staub

Margaret "Poppy" Staub is a Senior Principal based in Colorado with more than 28 years of experience focused on regulatory compliance, water quality, permitting, integrated management systems and sustainable business…

Brandon Steets, P.E.

Brandon Steets, P.E., is a Senior Principal Engineer based in California with more than 20 years of experience in National Pollutant Discharge Elimination System (NPDES) and Total Maximum Daily Load…

Olga Stewart, P.E., PMP

Olga Stewart is a Senior Environmental Engineer based in Alaska with more than 13 years of experience focused on site characterization of contaminated sites; conceptual site model development and refinement;…

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 20 years of experience focused on planning, design, and implementation of stormwater infrastructure and watershed management to meet drainage…

Ken Susilo, P.E., D.WRE

Ken Susilo is a Senior Principal Water Resources Engineer based in California with more than 25 years of experience focused on integrated urban stormwater management.

Will Tanner, P.E.

Will Tanner is a Principal Engineer based in Georgia with more than 16 years of experience focused on geotechnical and geostructural engineering and construction. His practice has evolved around a…

Shanna Thompson, P.E.

Shanna Thompson is a Principal Environmental Engineer based in Georgia with more than 19 years of experience focused on site investigation, remediation design, and remediation system operation. She has performed…

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 Minnesota with more than 25 years of environmental consulting experience focused on the characterization and remediation of soil, soil vapor, and groundwater…

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,…

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…
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