Ph. D. (2000) Institute of Mathematical Sciences, India.

Post Doctoral Fellow,  Max-Planck- Institute for Gravitation Physics, Germany (1999-2002)

Post Doctoral Fellow, ULB, Bruxelles, Belgium (2002-2004)

Assistant Professor, University of New Brunswick, Canada (2004-2006)

Associate Professor, University of New Brunswick, Canada (2006-2008)

Associate Professor, University of Lethbridge, Canada (2008-)

Affiliate, Perimeter Institute of Theoretical Physics.

Chair, Division of Theoretical Physics, Canadian Association of Physicists (2013-2015)