2011 Aug.- Assistant Professor, Department of Biological Sciences, East Tennessee State University, Johnson City, TN, USA

2009 Sept.- Visiting Research Associate, Great Lakes Bioenergy Research Center, Department of Plant Biology, Michigan State University, East Lansing, MI, USA   
    
2005 Sept.-2009 Aug: Postdoctoral Research Associate, Department of Biological Sciences, University of North Texas, Denton, TX, USA       

2005 (May-Aug.): Research Associate, Department of Biology, University of Louisiana at Lafayette, LA, USA

2000-05: Teaching and Graduate Research Assistant, Dept. of Biology, ULL, Lafayette, LA, USA

1996-99: Director (Technical) Invitro Biotek, Eluru, India

1995-96: Scientist, E.I.D Parry (I) Ltd., Research Center, Bangalore, India

1994: Research Associate, Godrej Plant Biotech Ltd., Hyderabad, India