- About Gradient
- Services & Projects
- Product Stewardship and Safety
- Risk Sciences
- Environmental Sciences
- Environmental Cost Analysis
- Global Regulatory Compliance
- People
- Principals
- Lisa A. Bailey
- Barbara D. Beck
- Andrew B. Bittner
- Teresa S. Bowers
- Eric L. Butler
- Joel M. Cohen
- David G. Dodge
- Samuel A. Flewelling
- Julie E. Goodman
- Kurt Herman
- Jessie M. Kneeland
- David E. Langseth
- Tom A. Lewandowski
- Ari S. Lewis
- Christopher M. Long
- David E. Merrill
- Michael K. Peterson
- Kim Reynolds Reid
- Lorenz R. Rhomberg
- Manu Sharma
- Peter A. Valberg
- Tim Verslycke
- A. Dallas Wait
- Senior Scientists
- Steven R. Boomhower, Ph.D.
- Ali Boroumand
- Chase Butler
- Jonathan C. Callura
- Jiayang Chien
- Amy Dale
- Anna M. Engel
- Grace I. Greenberg
- Mary L. Hixon
- Laura E. Kerper
- John M. Kondziolka
- Cynthia J. Langlois
- Julie C. Lemay
- Charlotte Marsh
- Rosemary Mattuck
- David B. Mayfield
- Matthew J. Mayo
- Isaac Mohar
- Margaret C. Pollock
- Robyn L. Prueitt
- Kathleen A. Radloff
- James W. Rice
- Jeffrey T. Rominger
- Naomi L. Slagowski
- Meghna H. Swamy
- Rebecca C. Ticknor
- Caroline B. Tuit
- Matthew P. Tymchak
- Jiaru Zhang
- Research & Information Specialists
- Principals
- Evolving Issues
- News & Events
- Recent Scientific Papers
- Careers
- Directions
About Gradient
Gradient is an environmental and risk sciences consulting firm renowned
for our specialties in Toxicology, Epidemiology, Risk Assessment, Product Safety, Contaminant Fate and Transport, Industrial Hygiene, Geographic Information Systems, and Environmental/Forensic Chemistry.
Since 1985, Gradient has employed sound science to assist national and global clients with resolving their complex environmental and health challenges.
Our Scientists are nationally recognized experts and active contributors to the advancement of knowledge for science solutions. Focusing on rigorous, high-end science and creative problem solving, our engagements are led by teams with top credentials and unparalleled client focus.