- Visited TU Darmstadt, Germany from May,2016 to July,2016
- Visited University of Caen, France during May-June, 2015.
- Visited University of Caen, France during June-July, 2014.
- Visited Human Language Technology Team of University of Caen Basse-Normandie, F-14032 Caen Cedex FRANCE during December 2013.
- Visited University of Trento, Italy during December, 2013.
- Visited FBK, Italy during December, 2013.
- Post Doctoral Research Fellow, University of Heidelberg, Germany from 1st September, 2009 to 30th June, 2010.
- Postdoctoral research fellow in Department of Information Engineering and Computer Science, University of Trento, Italy from September, 2010 - January, 2011 and June-July, 2011.
- Visited University of Melbourne, Australia in 2006.