2005-Present- Teaching Faculty, Department of Aerospace Engineering, IIT Kanpur
2002-2005- Head, Department of Aerospace Engineering, IIT Kanpur
*1992 - One month in summer, Expert on wind Energy, Integrated Rural Technology Centre, Palaghat, Kerala (on leave from IIT Kanpur)
*1991 - Three month in summer, Senior fellow at Folkecenter for Vedvarende Energi (Renewable Energy), Ydby, 7760 Hurup Thy, Denmark (on leave from IIT Kanpur)
1986-Present - Teaching Faculty, Aerospace Engineering, IIT Kanpur, India.
1985-1986 - Senior Visiting Research Fellow, Aeronautics and Astronautics, University of Southampton, England (On leave from IIT Kanpur).
1976-1979 - Coordinator, National Service Scheme, IIT Kanpur
1973-1985 - Teaching Faculty, Aerospace Engineering Department, IIT Kanpur, India.
1968-1973 - Ph.D. Student at Southampton, England
1967-1968 - Teaching Faculty, Aeronautical Engineering, IIT Kharagpur, India.