Professional Visits :

1. Visiting Assistant Professor, University of Washington, Seattle, USA, 2000

2. Visiting Fellow, International Centre for Theoretical Physics (ICTP), Trieste, Italy, March 2004.

3. Guest speaker at the workshop held in University of Kwazulu, Pietermaritzberg, South Africa, October, 2010.

4. Visiting Fellow, University of Koblenz, Germany, 2018.

5. Visiting Fellow, University of Hangzhou, China 2018.