Positions held earlier
- Dr Vikram Sarabhai Distinguished Professor at ISRO Headquarters and Chief Mentor, ISRO Strategy Group (ISG)
- Chairman, Executive Committee, National Board of Accreditation (NBA)
- Adjunct Professor, Birla Institute of Technology & Science (BITS), Pilani, India, an internationally reputed institution and Member Senate, BITS, Pilani
- Vice President, All India Dayanand Anglo-Vedic (DAV) College Managing Committee, a network of high quality schools (615) and colleges (60) throughout India.
- Member, Courts of Jawaharlal Nehru University (JNU), Delhi University and Guru Gobind Singh Indraprastha University, New Delhi
- Member, Academic Council, Guru Ghasidas Vishwavidyalaya
- Principal Adviser, CII (2004-2010)
- Scientific Adviser to Punjab Chief Minister (Minister of State Rank) from Oct 2002 to March 2004.
- Vice Chancellor & Chairman, Board of Governors, Punjab Technical University (PTU) from Oct 2002 – Feb 2004).
- (Founder) Executive Director TIFAC (Technology Information, Forecasting and Assessment Council) from July 1988 to November 2002. India Vision 2020 and many other Missions came from this Institution.
- Scientific Secretary to Principal Scientific Adviser to GoI (Secretary to Govt of India level post) from March 2000 to Oct 2002, Member – Secretary Scientific Advisory Committee to Cabinet etc.
- Senior Adviser (Technology), CII from Sept 1996 to March 2000.
- Advisor, Dept of Science & Technology (DST), Govt of India (Addl Secretary level position), from July 1988 – Sept 1996.
- Scientific Secretary, ISRO from 1976 to 1988.
- Director, Earth Observation Systems & several other senior positions in ISRO till 1988.
- Secretary, NNRMS (National Natural Resources Management systems) - Founder Chief Executive Officer) from 1983 to 1988.
- Responsible for programme management at senior corporate headquarter level for many projects of ISRO like SITE, SLV-3, Aryabhata, INSAT, IRS, PSLV decade profiles in ISRO etc. from 1970 to 1988.
- ISRO Engineer at NASA ATS – F Project Goddand Space Flight Centre (USA) from 1970 to 1973.
- Member, ISRO – MIT Study on INSAT 1970.
- Development Engineer in INCOSPAR/ISRO from 1966 to 1970.
- Research Scholar at Physical Research Laboratory, Ahmedabad from 1964 to 1966.
Others:
- Member of Executive Council of Universities: Banaras Hindu University (BHU), Doon University, Dehra Dun.
- Visiting Professor Anna University.
- Chairman, Nalanda University Board established by Bihar Govt.
- Member GC, M S Ramaiah Univ of Applied Sciences, Bangalore