Gradient Principal Environmental Consultants
Gradient's Principals are nationally recognized experts and active contributors to the promotion of sound science. We maintain our position as leaders in our scientific specialties through professional certifications, peer-recognized publishing, panel and conference participation, continuing education, and hands-on work on some of the world's most challenging environmental issues.
Select any Principal on this page for a biographical summary of their qualifications.
- Barbara D. Beck, Ph.D., DABT, FATS
Principal - Andrew Bittner, M.Eng., P.E.
Principal Scientist - Teresa S. Bowers, Ph.D.
President - Catherine Petito Boyce, S.M.
Principal Scientist - Eric L. Butler, Ph.D.
Principal - Julie E. Goodman, Ph.D., DABT
Principal - Kurt Herman, M.Eng., P.G.
Principal Scientist - David E. Langseth, Sc.D, P.E., D. WRE
Principal - Thomas A. Lewandowski, Ph.D., DABT
Principal Scientist - Ari S. Lewis, M.S.
Principal Scientist - Christopher M. Long, Sc.D.
Principal Scientist - David E. Merrill, M.S.
Principal - Lorenz R. Rhomberg, Ph.D., FATS
Principal - Manu Sharma, M.S., P.E.
Principal - Peter A. Valberg, Ph.D., Fellow ATS
Principal - Tim Verslycke, Ph.D.
Principal Scientist - A. Dallas Wait, Ph.D.
Principal