Our Team

Intertox is comprised of a multidisciplinary team of toxicologists, pharmacologists, industrial hygienists, occupational physicians, epidemiologists, and regulatory policy experts working together to solve complex human health and environmental issues with innovative, cost-effective, and resourceful approaches based on sound scientific methodology.

Our team continually promotes their professional growth through participation in numerous professional organizations.


Intertox Director
Richard C. Pleus, Ph.D.
Director and Toxicologist

Key Intertox Technical Staff
Erin R. Bennett, Ph.D.
Environmental Chemist

Gretchen Bruce Hoffer, B.S.
Senior Scientist

Lisa M. Corey, Ph.D.
Staff Toxicologist

Susan M. Leaman, M.S.
Staff Toxicologist

Key Intertox Associates
Richard B. Belzer, Ph.D.
Regulatory Policy

Paul Chang, Ph.D.
Visual Communication

Gary Pascoe, Ph.D., D.A.B.T.
Toxicologist






Michael K. Peterson, M.E.M., D.A.B.T.
Senior Scientist











Gary Rischitelli, M.D., M.P.H., J.D.
Occupational Physician
Medical Toxicologist

Barbara A. Trenary, C.I.H.
Certified Industrial Hygienist

Professional Memberships of the Intertox Team