Assistant professor, Medical microbiology and parasitology, Department of medical laboratory sciences, The Hashemite University, Zarqa, Jordan
Dean of Students Affairs and Research Director, Avalon University School of Medicine, Curaçao
Research Assistant, Medical Microbiology & Immunology Medical Microbiology Department, Creighton University,Omaha,Nebraska.
Professor of Medical Microbiology & Immunology, Dean of Students Affairs, Research Director,Avalon University School of Medicine, Sta. Rosaweg 122-124, Willemstad, Curaçao
Assistant Proffesor, Medical Microbiology and Immunology, Zagazig, Egypt