| 1968 | A.B. (Summa cum Laude), Columbia University |
| 1968-1971 | NSF predoctoral fellow |
| 1972 | Ph.D. Physics, Princeton University |
| (summer), Research Associate, Princeton University |
| -74 CTP Postdoctoral Fellow, University of Maryland |
| 1974 | -76 Research Associate, University of Chicago |
| 1976 | Compton Lecturer, University of Chicago |
| -80 Assistant Professor, University of Chicago |
| 1976-1980 | Sloan Foundation fellow |
| since 1983 | Editor, Chicago Lectures in Physics, University of Chicago Press. |
| 1984-1987 | Editorial Board, Classical and Quantum Gravity. |
| 1980 | -85 Associate Professor, University of Chicago |
| 1985-2001 | Professor, Department of Physics, Enrico Fermi Institute and the College, University of Chicago |
| since 1986 | Associate, Cosmology Program, Canadian Institute for Advanced Research |
| 1992 | Chairman, Scientific Organizing Committee for International Conference on General Relativity and Gravitation (GR13), Cordoba, Argentina. |
| 1996 | Fellow, American Physical Society |
| Chairman, Organizing Committee for Symposium on Black Holes and Relativistic Stars, Chicago |
| 1997 | Graduate Student Teaching Prize, University of Chicago |
| 1997-1999 | Editorial Board, Physical Review D. |
| | Since 1997 Director, Master s Program in the Physical Sciences, University of Chicago. |
| 1999-2002 | Chair-elect, Vice-chair, and Chair of the Topical Group on Gravity (GGR) of the American Physical Society. |
| 2000 | Fellow, American Academy of Arts and Sciences |
| 2001 | Elected to National Academy of Sciences |
| since 2002 | Charles H. Swift Distinguished Service, Professor Department of Physics, Enrico Fermi Institute and the College, University of Chicago |
