National Environmental Health Association. Fellow, Royal Society of Health.
Regional Advisor on Occupational Safety & Health, Regional Office(s) for Asia & the Pacific, International Labor Organization/Office. Managing Director, Industrial Health International, United Kingdom, 1984-1985. Chief Tech Advisor, Medical Service Consultants, Incorporated, United States of America, 1982-1983.
University Hygienist & Health Superviser, Radiation & Environmental Health & Safety, Rutgers University, 1978-1981. Senior Rch Scientist, Johns Hopkins University, 1977. Rch Fellow in Occupational Hygiene, London School of Hygiene & Tropical Medical, University of London, 1976-1977.
Instructor in Occupational Hygiene, School of Public Health, American University of Beirut, 1972-1975.