• June 2005 to May 2007: Post Doctoral Research Associates, Department of Chemical & Biomolecular Engineering, University of Nebraska, Lincoln, USA with Prof. R. F. Saraf.
• June 2007 to September 2008: TEES Research Assistant Engineer, Texas A&M University (TAMU), College Station, Texas – USA with Prof. H. Liang.
• October 2008 to December 2010: TEES Research Associate Engineer, Texas A&M University (TAMU), College Station, Texas – USA with Prof. H. Liang.

          July 2016 to May 2017: Visiting faculty under BASE Fellowship to Texas A&M University, College Station, Texas, USA.