Ray Petrisek is director of environmental microbiology at HP Environmental Laboratory, where he consults on indoor air quality (IAQ) assessments, reviews scientific data dealing with human exposure to biohazards, and has conducted numerous investigations of biocontamination of water-damaged buildings and water systems. Petrisek is a member of the American Industrial Hygiene Association (AIHA), the American Academy of Allergy and Immunology, American Academy of Microbiology, American Society of Microbiology, and the International Association for Aerobiology. He received his bachelors of science and administration degrees in microbiology from Kent State University and his master of science in medical microbiology from Ohio State University.