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 -
Marc Lorenzen, Ph.D.
Principal Business Advisor -
Judi L. Durda
Corporate Secretary, Principal Toxicologist -
David Livermore, R.G., L.H.G.
Principal Hydrogeologist -
William Locke, P.E.
Principal Hydrologist -
James Lape
Principal Environmental Scientist, Human Health Risk Assessor -
Michael V. Ruby
Principal Scientist -
Steven O. Helgen
Principal Geochemist -
William Cutler, P.G.
Principal -
Reid M. Carscadden, P.E.
Principal Engineer
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 -
Todd Martin, P.E.
Senior Managing Engineer, Hydrogeochemist -
Jennifer Sampson
Senior Managing Ecologist -
Randi Wexler
Senior Managing Scientist, Regulatory Affairs -
Damian V. Preziosi
Senior Managing Environmental Scientist -
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.
Senior Managing Engineer
Jennifer Sampson
Senior Managing Ecologist
Ms. Jennifer Sampson is an aquatic ecologist and risk assessor with 20 years of experience investigating stream, river, and wetland ecosystems, and evaluating ecological risks associated with anthropogenic disturbance. She specializes in identifying structural and functional components of ecosystems and predicting ecological responses following chemical or physical perturbations. Ms. Sampson has project experience in ecological risk assessment, sediment toxicity investigations, natural resource damage assessment (NRDA), habitat restoration, ecological research, development of aquatic systems monitoring strategies, and development of remedial investigations/feasibility studies (RI/FSs) under Superfund. She has performed quantitative modeling of bioavailability, bioaccumulation, and exposure to xenobiotics in terrestrial and aquatic food webs.
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