Dr. Hatfield is Professor and former Chair of Environmental and Occupational Health at the California State University, Northridge. A Registered Environmental Health Specialist (REHS), he was general chair of the National Environmental Health Science and Protection Accreditation Council, and is a subject matter expert for the California REHS exam. He is a senior Technical Editor for the Journal of Environmental Health, and has received funding from the UNEP, CDC, NIH, WHO, AID, and ATSDR. He has also held adjunct appointments at the University of Eastern Finland and Tampere Technical University.
Tsai P and T Hatfield, “Global Benefits from the Phaseout of Leaded Fuel,” Journal of Environmental Health, December 2011.
Hatfield TH, “Measuring the Value of Environmental Health Programs,” California Journal of Environmental Health 29(1): 5-7, Spring 2010.
Hatfield TH, “Paradigm Shift: 10 trends that are changing the Environmental Health Profession,” California Journal of Environmental Health 28(2): 5-7, Fall 2009.
TH Hatfield, J Schillinger, O Seiver, “Health Effects from Mold – Evaluating the Current Evidence,” California Bulletin for Environmental Health Specialists, 2003.
Hatfield TH, "Risk Analysis for Environmental and Occupational Health Professionals" (textbook), National Environmental Health Association, 2002.
Seiver OH and TH Hatfield, "The Determination of Thresholds of Environmental Significance in the Application of the California Environmental Quality Act (CEQA)" California Faculty Fellows, April 2001.
Hatfield TH and OH Seiver, "Preference Reversals for Grading Systems of Retail Food Facilities," Journal of Environmental Health, April 2001.