From 2002 Onwards 

Visiting Assistant Professor at EE Department, The Pennsylvania State University, USA.

From 2000 to 2002

Post Doctoral Research Associate at EE Department, The Pennsylvania State University, USA.

From 1996 to 2000

        Scientist ‘C’ from 1996-2000, in the same organization

From 1993 to 1996

Scientist ‘B’ in the Microwave group from 1993 to 1996 at Defence Research and Development Organization, Bangalore.