• 1967-1970: (undergraduate student) Mathematics and Physics, Tel Aviv University • 1970-1972: Military Service and MSc studies Space Sciences, Tel Aviv University under the guidance of A. Eviatar. • 1970-1976: Military Service and PhD thesis under the supervision of J. Shaham and J. Katz at the Hebrew University of Jerusalem: Penrose process and on modeling of GRBs from instabilities around black holes. • 1976-1977: Research Associate at Oxford with
Dennis Sciama's group: accretion disks instabilities and winds • 1977-1979: Research associate and later Assistant Prof. at the University of Texas at Austin with
Bryce DeWitt's group: foundation of Numerical Relativity, jets in AGNs. • 1980-1987: Long-term member at the
Institute for Advanced Study in Princeton, NJ and a faculty at the Hebrew University of Jerusalem: Numerical Relativity, Rotating gravitational collapse, Inflation, Galaxy biasing, neutrinos from SN 1987A • 1988-1990: The Hebrew University: Gamma-ray Bursts • 1990-1993: CFA Harvard: Gamma-Ray Bursts • 1998-1999: Visiting Prof. Columbia University and NYU • 2000- :Astronomical limits on Lorentz invariance violation • 2004-2005: Moore Scholar Caltech • 2005-2009: Dean Hebrew University School of Business Administration • 2009- :ERC Advanced Research Grant ==Honors==