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
Robert Pastorok, Ph.D.
Senior Science Advisor, Ecologist
Dr. Robert Pastorok is an ecologist specializing in ecological risk assessment and evaluation of natural resources. He has more than 30 years of experience developing and applying quantitative empirical techniques and ecological models to evaluate and solve environmental issues. Dr Pastorok has managed or served as technical lead on projects to address siting of industrial, municipal, and commercial facilities, cleanup of chemically contaminated urban-industrial habitats, restoration and conservation of habitat, and management of aquatic and terrestrial ecosystems. Dr. Pastorok has led major multidisciplinary investigations in Puget Sound (Washington), the Willamette River (Oregon), the Hudson River (New York), and the Clark Fork River (Montana). He has managed projects to develop risk management decision frameworks, ecotoxicological methods, risk assessment models, and chemical standards for soil, surface water, sediments, and wetlands. He was instrumental in the development of technical approaches in the USEPA framework for ecological risk assessment, the Washington State Model Toxics Control Act program, the Puget Sound Estuary Program, and the USEPA training program for use of population modeling in ecological risk assessment.
Dr. Pastorok was the lead author and editor of the seminal book titled Ecological Modeling in Risk Assessment: Chemical Effects on Populations, Ecosystems, and Landscapes (2002, CRC Press). He contributed substantially to two SETAC Pellston workshops and the resulting books (Uncertainty Analysis in Ecological Risk Assessment and Population-Level Ecological Risk Assessment). Dr. Pastorok is internationally known for his expertise in ecological modeling and risk assessment and has been an invited technical reviewer for prominent journals, industries, and environmental management agencies.
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