Gradient Senior Scientists
Gradient is proud to have a diverse, skilled, and well-trained technical staff who work collaboratively to manage our projects, perform research, and deliver superior quality, innovative solutions.
Select any of the senior scientists on this page for a biographical summary of their professional qualifications, recent projects, and selected publications
- Lisa A. Bailey, Ph.D.
Senior Health Scientist - Leslie A. Beyer, M.S., DABT
Senior Environmental Health Scientist - Christopher Brynczka, Ph.D., DABT
Sr. Toxicologist - David G. Dodge, M.S., DABT
Senior Toxicologist - Samuel A. Flewelling, Ph.D.
Senior Hydrologist - Mary L. Hixon, Ph.D.
Senior Toxicologist - Ashish C. Jachak, Ph.D.
Environmental Engineer - Laura E. Kerper, Ph.D.
Senior Toxicologist - Cynthia J. Langlois, M.S.
Senior Health Scientist - Laurent C. Levy, Ph.D., P.E.
Senior Project Manager - Rosemary Mattuck, M.S.
Senior Environmental Engineer - David B. Mayfield, M.S., DABT
Senior Toxicologist - Marc A. Nascarella, Ph.D., CPH
Senior Toxicologist - Michael K. Peterson, M.E.M., DABT
Senior Toxicologist - Robyn Prueitt, Ph.D.
Senior Health Scientist - Kathleen A. Radloff, Ph.D.
Environmental Engineer - Kim Reynolds Reid
Senior Environmental Chemist - Sonja N. Sax, Sc.D.
Environmental Scientist - Mara Seeley, Ph.D., DABT
Senior Toxicologist - Caroline B. Tuit, Ph.D.
Senior Environmental Chemist - Matthew P. Tymchak, M.S.
Hydrologist
