• Visiting Professor, School of Engineering, Science & Primary Industries, Waikato Institute of Technology, Hamilton, New Zealand; One year (Jan 2012 - Dec 2012).
  • Visiting Researcher, School of Engineering, University of Guelph, Canada; Three months (May 2008 - July 2008).
  • DAAD Visiting Professor, Institute of Earth & Environmental Sciences, University of Potsdam, Potsdam, Germany; Three months (May 2007 - July 2007).
  • Mathematical Modelling Expert, State Water Resources Agency (SWaRA), U.P. Water Sector Restructuring Project, Lucknow; Two years (Jan 2004 - Dec 2005).
  • Guest Researcher, Institute of Hydrology & Meteorology, Technical University of Dresden, Germany; One month (June 2003 - July 2003)
  • Guest Researcher, Institute of Hydrology & Meteorology, Technical University of Dresden, Germany; Two months (May 2002 - June 2002)
  • DAAD Visiting Researcher, Institute of Hydrology & Meteorology, Technical University of Dresden, Germany; Three months (May 2001 - July 2001).
  • Post-Doctoral Researcher, Civil & Environmental Engineering Department, University of Connecticut, USA; One year (May 1999 - May 2000).
  • BOYSCAST Fellow, Danish Hydraulic Institute, Denmark; One year (May 1995 - May 1996).