Key Positions


  • Research Fellow, California Institute of Technology, 1965.

  • Honorary Professor, University of Buckingham, UK.

  • Honorary Professor University of Ruhuna, Sri Lanka.

  • Visiting Professor, University of Peradeniya, Sri Lanka.

  • Honorary Professor, Sir John Kotelawala Defence University, Sri Lanka.

  • Adjunct Professor, National Institute of Fundamental Studies, Sri Lanka.

  • Editor in Chief, Journal of Astrobiology and Outreach.

  • Board Member, Institute for the Study of Panspermia and Astroeconomics.


  • Research Fellow, California Institute of Technology, 1965.

  • Professor of Mathematics, Vidyodaya University of Ceylon, 1966.

  • Visiting Professor, Universities of Arizona and Maryland USA, 1966-1970.

  • Visiting Professor, Yukawa Institute, Kyoto University, Japan, 1969.

  • Tutor and Supervisor in Mathematics, Jesus College, Cambridge.

  • Member of the Graduate Staff, Institute of Theoretical Astronomy, University of Cambridge, 1966-1973.

  • Visiting Professor, University of Western Ontario, London, Ontario, Canada, 1974 and 1976.

  • Director, Institute of Fundamental Studies, Sri Lanka, 1982-1984.

  • UNDP Consultant/Advisor, President of Sri Lanka, 1982-1984.

  • Visiting Professor, Institute of Space and Astronautical Studies, Japan, 1993.

  • Visiting Professor, University of the West Indies, Mona, Kingston, 1994.

  • Professor and Head of the Dept.of Applied Maths and Astronomy, University College, Cardiff, 1973-1989

  • Professor of Applied Mathematics and Astronomy, Cardiff University, 1990-2006

  • Professor and Director, Cardiff Centre for Astrobiology 2006-2011

  • Visiting Fellow, Churchill College, Cambridge 2015-2016.