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
Andrew Nicholson, Ph.D.
Senior Managing Scientist
Dr. Andrew Nicholson is a geochemist with 22 years of experience assessing the environmental impacts and chemical fate at industrial facilities and mining sites. Dr. Nicholson has conducted analyses of the source and mobility of petroleum hydrocarbons, metals, PCBs, and other chemicals in sediment, soil, and groundwater. His diverse, interdisciplinary experience includes predicting future water quality for the permitting of mines, fingerprinting petroleum hydrocarbons in the environment for litigation, and achieving regulatory approval of monitored natural attenuation as a remedy for metals and organic compounds in groundwater. His work has included extensive analysis of the behavior of acids, metals, radionuclides, and organic compounds in the environment at mines and in chemical manufacturing, petroleum production, and industrial settings.
Dr. Nicholson has authored numerous articles and book chapters, including the chapter on groundwater chemistry in the most recent edition of Groundwater and Wells, the standard reference for the water well industry. Known for his extensive litigation and regulatory experience, he serves on the faculty of the annual American Legal Institute/American Bar Association Short Course on Environmental Litigation.
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