Lecturer, A. C. College of Technology, University of Madras (1977 79)
Senior (Post-Doctoral) Research Fellow, University of Salford, England (1979 84)
Scientist in various capacities (Sci. EI to Sci. G during 1984-2003), National Chemical Laboratory (CSIR-NCL), Pune
Director, National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur (August 2003-January 2008)
Director, Board of Directors, and Member, Audit Committee, KIOCL, Bangalore (2006-09)
Director, Board of Directors and Member, Audit Committee, HOCL Mumbai (2006-09)
Environmental Consultant – Alcoa (USA), Feb 2008- Jan 2011.
Honorary Visiting Fellow, University of Salford, England (1984-90, 1994-95).
Professor of Eminence, Anna University (Hon), 2022-25
Chemical & Environmental Engineering – Independent Consultant (2011 to present)
Sukumar Devotta