Chairperson of the Natural Science Department, 2006 - present, Lebanese American University.
Associate Professor, 1978 - present, , Chemistry Department, Lebanese American University.
Chemistry Instructor, 1982 - 1983, Hariri Nursing School-Kfrafalos.
Chemistry Instructor , 1977, Lebanese University, Education Department
Research Assistant, 1974 - 1975, Environmental Science Department/School of Public Health, American University of Beirut.
Member of the European Water Resources Association, 2009 - present.
Member of the Lebanese Association for the Advancement of Science, 2008 - present.
Member of the Lebanese Graduates of British Universities, 2000 - present.
Member of the Society of Environmental Geochemistry and Health – European Branch, 1997 - present.
Said Akl Prize, 2001.