American Waterworks Association. American Water Pollution Control Federation. Sigma Xi Society.
Regional Advisor in Environmental Health, Drugs Policy, Environmental Health & Health Technology (DET), World Health Organization Regional Office(s) for the Western Pacific since 1989. Team Leader, World Health Organization Country Office, Bangladesh, 1985-1989. Professor of Environmental Engineering, Middle East Tech University, Turkey, 1982-1985.
Fey Member/Lecturer, School of Public Health, 1980-1982, Director, Division of Air Quality Management, 1979-1980, Senior Tech Advisor/ Acting Director, Environmental Health, 1977-1979, Ministry of Health, Turkey. Senior Research and Development Engineer(s), Tech Centre, Union Carbide Corporation(s), United States of America, 1975-1977.