Experience

1957-1959 
Commissioned officer, US Public Health Services.

1957-1960 
National Institutes of Health, Bethesda, Maryland, Laboratory of Physical Biology, National Institute of Arthritis and Metabolic Diseases.

1959-1961 
Assigned from US Public Health Service to El Salvador, Faculty of Medicine. Visiting Professor of Microbiology.

1961-1966 
Returned to previous assignment, NIH.

1966-1968 
Head, Section of Cell Biology and Immunology. Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases and Laboratory of Physical Biology, NIH.

1968-2009 
Hebrew University, Professor of Parasitology, Hadassah Medical School.

1974-1978 
Chairman, Department of Parasitology.

1977-1982 
Director of the Kuvin Centre for the Study of Infectious and Tropical Diseases.

1986-1989 
Director, School of Public Health and Community Medicine, Hebrew University.