- Mentor from India for Sakura Science, Ibaraki University, Japan exchange program,21 May 2018 – 08 June 2018
2. Visiting Professor ,Academia Sinica, Taipie, Taiwan,08 Jan 2018-13 Jan 2018
3. Visiting Professor, Ludwig Maximilians University, Germany,19 Aug 2017-05 Sep 2017
4. Visiting Professor (Indo-Russia DST-RSF project), Institute of Biomedical Chemistry, Moscow and St. Petersburg,18 June 2017-27 June 2017
5. Visiting Professor, Kyushu University, Japan, 28 Apr 2014-01 July 2014
6. Visiting Professor , Institute of Molecular Sciences, Okazaki, Japan ,28 Nov 2011-02 Apr 2012
7. INSA-JSPS Visiting Scientist &Invited Speaker, Institute of Molecular Science, Japan; Gifu University, Japan;Chemical Society of Japan, 22 May 2010-28 May 2010
8. INSA-JSPS Visiting Scientist, Institute of Molecular Science, Japan,11 May 2009-20 May 2009
9. Visiting Scientist, Jackson State University, United States of America,13 Oct 2008-28 Nov 2008
10. DST-DADD Visiting Scientist, Ludwig Maximilians University, Germany,05 June 2008-26 June 2008
11. IMS Visiting Researcher, Institute of Molecular Science, Okazaki, Japan,25 Jan 2008-30 Jan 2008
12. Alexander Von Humboldt Fellow & invited speaker in Germany (Munich, Harburg, Mulheim, Giessen, Berlin, Heidelberg), Netherland (Amsterdam, Leiden), Switzerland (Geneva, Fribourg) and Belgium (Brussels), Ludwig
13. Maximilians University, Germany, 01 July 2006-05 June 200
14. Visiting Scientist, University of Fribourg, Switzerland, 01 May 1998-30 July 1998