Santanu Ray is a Distinguished Visiting Professor in the School of Informatics at Digital University Kerala. 

• 2009 (March) onwards: Professor, Dept. of Zoology, Visva-Bharati University.
• Institute of Ecology, University of Georgia, Athens, Georgia 30602, USA. Worked with Prof.
  Eugene. P. Odum, Prof. Barnard. C. Patten, Prof. Peter. Varity and Prof. Robert. E. Ulanowicz.
• Section of Environmental Chemistry, Royal Danish School of Pharmacy, Copenhagen, Denmark
  (Worked with Prof. Sven Erik Jorgensen).
• Department of Theoretical Biology, Czech Academy of Science, University of South Bohemia, Czech Republic (Worked with Prof. Milan Straskraba).
• Assistant Professor (Adjunct faculty) Department of Biology, University of South Bohemia
  (Jhioceska Univerzita), Czech Republic.
• Post-doctoral researcher, Department of Marine Science, Calcutta University, India, and partly
  at the Department of Mathematics, Jadavpur University, Calcutta.
• PhD researcher at the Department of Marine Science, Calcutta University, India.