1982 – Present Hebrew University - Hadassah Medical School, Jerusalem, Israel, Professor of Virology.
2003 – 2008 Chairman, Department of Virology, Hebrew University-Hadassah Medical School.
2001 – 2002 National Institutes of Health, Vaccine Research Center, Bethesda. MD. Sabbatical, Visiting Scientist.
1992 – 2000 Bio-Technology General Corp, Israel, Chief Scientist of the company
1991 – 1992 College of Physicians of Columbia University, New York, NY. Sabbatical, Visiting Professor at the Department of Biochemistry.
1986 – 1991 Bio-Technology General Corp, Israel, Director of Research of the company.
1985 – 1986 Massachusetts Institute of Technology, Cambridge, MA. Sabbatical, Visiting Professor at the Whitehead Institute.
1979 – 1982 Hebrew University - Hadassah Medical School, Jerusalem, Israel. Associate Professor of Virology.
1979 – 1980 National Institutes of Health, MD. USA. Sabbatical, Visiting Scientist.
1978 – 1979 Hebrew University - Hadassah Medical School, Jerusalem, Senior Lecturer of Virology.
1975 – 1977 Hebrew University - Hadassah Medical School, Jerusalem, Lecturer of Virology.
1973 – 1975 Massachusetts Institute of Technology, Center for Cancer Research, Cambridge, MA. D.S.R. Staff Member - in Dr. David Baltimore's laboratory.
1971 – 1973 Massachusetts Institute of Technology, Department of Biology and Chemistry, Cambridge, MA. Research Associate- in Dr. Gobind Khorana's laboratory.
Prizes and awards
1979 Recipient of The Hestrin Prize for Biochemical Research, awarded by the Israel Biochemical Society.
1985 Recipient of The Eleanor Roosevelt International Award for Cancer Research.
1995- Present Incumbent of the Dame Susan Garth Chair for Cancer Research.
2004 Recipient of the Sarov Prize, awarded by the Israel Microbiology Society.
1990, 1998 and 2004 Recipient of the Hebrew University Rector prize for exellence in teaching.
1986 - 2000 Director of research and Chief scientist of BioTechnology Corp. Responsible for the devison of research and development. Development of three clinicaly approved products, recombinant Human Growth Hormone, Hyaluronic acid and a vaccine aginst Hepatitis B virus.
2000 License through The Hebrew University of the “Bio-pump” invention to Medgenics Corp and Cofounder of the company Medgenics. The company is now in the clinical phase of the Bio pump development for in vivo production of therapuitic proteins.
2000 License through the Hebrew University of the “Oncolytic virus” invention to Theravir Corp. and Cofounder of the company Theravir. A phase 1 clinical study has been completed successfully with patients suffereing of Glioblastoma.
Scientific articles 188, published in international refered journals.
Patents and patent applications 21, published in patent data bases.