Staff
Company Officers and Principals
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Lucinda Jacobs, Ph.D.
President, Principal Aquatic Scientist -
Betsy Day
Vice President, Principal Sediment Scientist -
Larry F. Marx
Vice President of Corporate Development -
Russell E. Keenan, Ph.D.
Vice President, Principal Toxicologist -
Judi L. Durda
Vice President, Corporate Secretary, Principal Toxicologist -
David Livermore, R.G., L.H.G.
Principal Hydrogeologist -
William Locke, P.E.
Principal Hydrologist -
Randi Wexler
Principal, Regulatory Affairs -
Damian V. Preziosi
Principal Environmental Scientist -
James Lape
Principal Environmental Scientist, Human Health Risk Assessor -
Michael V. Ruby
Principal Scientist -
Steven O. Helgen
Principal Geochemist -
William Cutler, Ph.D., P.G.
Principal -
Reid M. Carscadden, P.E.
Principal Engineer -
Edward P. Conti, C.E.G., C.H.G., P.G.
Principal Geologist
Senior Managing Scientists and Engineers
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Robert Pastorok, Ph.D.
Senior Science Advisor, Ecologist -
Scott Becker, Ph.D.
Senior Managing Ecotoxicologist -
R. Dreas Nielsen
Senior Managing Marine Scientist, Quantitative Analyst -
Les Williams, Ph.D.
Senior Science Advisor, Aquatic Ecologist -
Laura Jones
Senior Managing Scientist -
Todd Martin, P.E.
Senior Managing Engineer, Hydrogeochemist -
Jennifer Sampson
Senior Managing Ecologist -
Andrew Nicholson, Ph.D.
Senior Managing Scientist -
Gene Revelas
Senior Managing Scientist -
Kenneth E. Kolm, Ph.D., P.G., P.Hg.
Senior Science Advisor -
Patrick O. Gwinn
Senior Managing Scientist -
John Samuelian, Ph.D.
Senior Managing Scientist -
Marcia Greenblatt, Ph.D., P.E.
Senior Managing Hydrologist -
Ellen S. Ebert
Senior Managing Scientist -
Ramesh Venkatakrishnan, Ph.D., P.G.
Senior Science Advisor
Sue Trevathan
Senior Environmental Scientist
Ms. Sue Trevathan has over 25 years of experience as a project manager, environmental scientist, and technical author and editor. She has successfully conducted environmental assessments at aquatic and terrestrial sites, involving complex analyses of multiple contaminants. She has been a technical and editorial contributor to the nation’s most challenging cleanup investigations, including sites in Portland, Oregon; Butte, Montana; Tacoma, Bangor, and Harbor Island, Washington; and uranium milling and mining sites in New Mexico. Ms. Trevathan readily applies her substantial knowledge and experience in the environmental field to the accurate communication of scientific information for both technical and nontechnical audiences.
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