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
John Samuelian, Ph.D.
Senior Managing Scientist
Dr. John Samuelian brings 23 years of experience in environmental consulting, environmental and analytical chemistry, database development and management, human and ecological risk assessments, quality assurance, site investigation design, and remedial alternatives evaluation. He has served as environmental chemist, senior task leader, project manager, senior technical reviewer or QA/QC officer for a number of remedial investigations and feasibility studies (RI/FSs); remedial designs; remedial action construction projects; human and ecological risk assessments; commercial product risk assessments; aquatic ecology studies; manufactured gas plant (MGP) sites; private well surveys; and USATHMA, USACE, RCRA, and RBCA site investigations. Projects have included PCB and dioxin sites, building investigations, municipal and industrial landfills, arsenals, a lead shot site, pulp and paper mill sites, contaminated sediment sites, and solvent waste sites. These projects have ranged from several thousand to multimillion dollar efforts. He has also served as QA/QC officer, auditor, and assessor of overall data quality for similar projects. Dr. Samuelian has provided support for projects throughout the U.S. for clients from the public and private sectors.
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