Professor, City College of CUNY (since 1997)
Associate Professor, City College of CUNY (1993-1996)
Associate Professor, Columbia University (1991-1993)
Assistant Professor, Columbia University (1987-1991)
Research Associate, Institute for Theoretical Physics, Santa Barbara (1985-1986)
Research Associate, Institute for Advanced Study, Princeton (1983-1985)
Ph.D., Syracuse University, New York, 1983
M.Sc., University of Kerala, India, 1978
B.Sc., University of Kerala, India, 1976
The Abdus Salam International Center for Theoretical Physics, Trieste, Italy (Summers 1998, 1999, 2001-2005, 2008)
Isaac Newton Institute, University of Cambridge, UK (August 2007)
The Perimeter Institute for Theoretical Physics, Waterloo, Canada (February & September 2006)
Massachusetts Institute of Technology, Cambridge, MA (Spring 2000)
Rockefeller University, New York, NY (Autumn 1999)
Institute for Advanced Study, Princeton, NJ (Autumn 1999)
National Science Foundation Research Grants PHY-9322591, PHY-9605216, PHY-0070883, PHY-0244873 and PHY-0555620, since August 1994.
CUNY Collaborative Research grants (1996-1998, 1999-2001, 2005-2007)
PSC-CUNY awards, every year from 1993.
Students who completed their Ph.D.: Jeremy Schiff (1991), Ravit Efraty (1994), Garnik Alexanian (1999), Aleksandr Yelnikov (2004), Yasuhiro Abe (2005), Hailong Li (2006).