Gradient is an environmental and risk science 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 human health challenges. 

Our scientists apply skills and expertise to challenging issues relating to chemicals in the environment, workplace and products.  We work in a variety of fields affecting environmental and human health, including:  

Toxicology & Risk Sciences
Exposure & Risk Assessment
Epidemiology
Ecological Risk
Occupational Health & Safety
Gene-Environment Interactions
Chemistry/Forensics
Chemical Fate & Transport
Data Quality Management
Remedial Strategies
Air Quality
Geographic Information System (GIS)
Climate Impacts
Water Resources
Cost Recovery/Allocation
Environmental Cost Estimation
Global Chemical Registration & Notifications
GHS Hazard Assessment
Safety Data Sheet (SDS) Support
Pharmaceuticals/ Biopharmaceuticals
Medical Devices
Predictive Toxicology
Biocompatibility
Nanotechnology
Food Safety
Green Chemistry & Alternatives Assessment

Chemicals

Gradient

Manu Sharma

Marcia A. Olson

A. Dallas Wait

Tim Verslycke

Teresa S. Bowers

Samuel A. Flewelling

Michael K. Peterson

Lisa A. Bailey

Lindsey K. Borton

Kim Reynolds Reid

Joel M. Cohen

Jiaru Zhang

Jessie M. Kneeland

Jeffrey T. Rominger

Eric L. Butler

Christopher M. Long

Caroline B. Tuit

Scientist Team

Environmental Scientists and Engineers

Leadership Team

Teams at Gradient

Scientist Team

Environmental Scientists and Engineers

Leadership Team