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James Keenan, PhD, MS, DABT, Senior Managing Health Scientist


Full Resume (PDF)
Phone: (703) 373-7833
Fax: (703) 373-7601 
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Location: Washington, DC





Dr. James J. Keenan board-certified toxicologist and Senior Managing Health Scientist with Cardno ChemRisk.  He has a wide range of experience including risk assessment, exposure assessment, and toxicology.  His doctoral research included indoor and outdoor exposure assessments of children and adults to pesticides, including large scale biomonitoring studies.  Additionally, Dr. Keenan has vast experience in designing and conducting laboratory and field studies concerning the environmental fate of chemicals indoors and outdoors.  Dr. Keenan has participated in research concerning perchlorate, nitrate, and nicotine exposure to the general public.  Furthermore, he has performed research and provided litigation support concerning exposure to lead, asbestos, diacetyl, trichloroethylene (TCE), tetrachloroethylene (PCE), dioxins/furans, polycyclic aromatic hydrocarbons (PAH), cadmium, copper, chromium, nickel and benzene. 


  • PhD, Environmental Toxicology, University of California, Riverside, CA, 2007
  • MS, Veterinary Medical Sciences, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, 2003
  • BS, Animal and Poultry Science, Virginia Polytechnic Institute and State University, 2000

Professional Associations

  • Society of Toxicology (SOT)
  • American Chemical Society (ACS)
  • International Society of Exposure Assessment (ISEA)

Awards/Professional Honors

  • Travel grant recipient. American Chemical Society, Agrochemicals Division, 2006
  • Carl Strom/Western Exterminators Scholarship for Urban Entomology, 2006
  • Mini grant recipient. Graduate Student Association, University of California, Riverside, 2006, 2005, 2004
  • Carl Strom/Western Exterminators Scholarship for Urban Entomology, 2005, 2004
  • Graduate Student Fellowship, University of California, Riverside, 2003

Practice Areas

  • Crisis Management
  • Exposure Assessment and Dose Reconstruction
  • Health and Environmental Risk Assessment
  • Product Sustainability
  • Toxicology and Ecotoxicology


Christy Barlow
Amanda Burns
Brent Finley
Denise Hill
James Keenan
Michael Kovochich
Marisa Kreider
Amy Madl
Andy Monnot
Rachel Novick
Dennis Paustenbach
Angie Perez
Brooke Tvermoes

Key Services

  • Hazard assessments
  • Dose-response modeling and assessments
  • Physiologically Based Pharmacokinetic (PB-PK) modeling
  • Toxicology study design, management and interpretation
  • Structure activity relationships
  • Causation assessments and evaluations


pdf buttonCardnoChemRisk: Toxicology and Ecotoxicology


·         Heather Avens

·         Amanda Burns

·         Megan Glynn

·         Matt Ground

·         Matt Le

·         Chris Ronk

·         Paul Scott

·         Ken Unice