- Associate Professor: Department of Aerospace Engg., Indian Institute of Technology Kanpur, December 2005 – till date.
- Assistant Professor: Department of Aerospace Engg., Indian Institute of Technology Kanpur, October 1997 – December 2005.
- Postdoctoral Fellow: Texas Institute of Computational and Applied Mathematics (University of Texas at Austin) January 1997 - August 1997.
- Research Assistant: Department of Aerospace Engg., Texas A & M University, college station (Texas), August 1991 - December 1996.
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