Theodore J. Hogan, PhD, CIH Expert Witness

Contact Information

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Specialties & Experience

General Specialties:

Industrial Hygiene and Safety

Specialty Focus:

Certified Industrial Hygienist, CIH, Chemical exposure assessment, research, OSHA, COVID-19, Professor


PhD, Public Health, University of Illinois at Chicago; MS, Public Health, University of Illinois at Chicago; BA, Chemistry, Loyola University, Chicago

Years in Practice:


Number of Times Deposed/Testified in Last 4 Yrs:


Additional Information

Certified Industrial Hygienist. Consulted on over 100 cases on behalf of defendants and plaintiffs. Evaluate occupational and environmental exposures and their potential health risks, including reviews of past exposures, and skin exposures. Testified on workplace injuries and fatalities. This work is separate from my Northern Illinois University employment or other professional affiliations. Associate Professor at Northern Illinois University (tenured). Subject areas: industrial toxicology, occupational safety and health, industrial environmental sustainability. Member of an international committee which develops chemical workplace exposure guidelines relied on worldwide. Consultant (since 1990) to over 400 clients, providing industrial hygiene, safety, and environmental health services. Business sectors include: manufacturing, utilities, food production, petrochemical, hospitals, pharmaceuticals, plastics. Provided infection control guidance to healthcare facilities and industrial operations. Was the first industrial hygienist hired by Commonwealth Edison and built and ran their industrial hygiene program. Then became corporate head of safety and industrial hygiene for this 18,000 employee company. Authored chapters in "Fundamentals of Industrial Hygiene" (3rd, 4th, 6th, and the "Air Sampling" chapter in the upcoming 7th edition). FIH is the premier Industrial Hygiene textbook and is used by over 50 universities worldwide.