* 2008-2009: Visiting Assistant professor, Michigan State University, USA.
* 2003-Present: Assistant professor, IITM, Chennai, INDIA
* 2001-2003: Research Associate, Madurai Kamaraj University, Madurai,INDIA
* 1999-2001: Research Associate, University of Florida, USA
* 1997-1999: Research Associate, Madurai Kamaraj University, Madurai,INDIA