I have worked with occupational environmental medicine for over 25 years. My areas of expertise include clinical medicine; chemical and biological weapons; epidemiology; indoor air quality evaluations; medical and responder management of casualties; medical-legal causation; medical toxicology; non-stockpile chemical weapons demilitarization; pathology; physical and organic chemistry; radiation effects; risk communication; risk and exposures; toxic and hazard medical effects; toxic substances; weapons of mass destruction (WMD); workplace disease cluster; and workplace toxicant exposure investigations. I have provided consultations, deposition, and courtroom testimony for more than two decades as an occupational medicine expert witness.