1976 - 1981 Research Assistant at Diabetes Research Centre & M.V. Hospital for Diabetes
1981 - 1984 Assistant Director at Diabetes Research Centre & M.V. Hospital for Diabetes
1984 - 1985 Welcome Research Fellow at Royal Postgraduate Medical Schools & Hammersmith Hospital, London,U.K.
1985 - 1986 Alexander Von Humboldt Fellow at University of Ulm, West Germany
1986 - 1991 Director at M.V.Hospital for Diabetes
1986 - 1991 Deputy Director at Diabetes Research Centre
1991 - Present Chairman & Chief Diabetologist at Dr. Mohan’s Diabetes Specialities Centre
1997 - Present Director & Chief of Diabetes Research at Madras Diabetes Research Foundation
2006 - Present Adjunct Visiting Professor at Hubert Department of Global Health, Rollins School of Public Health,Emory University, Atlanta, USA
2007 - Present Adjunct Associate Professor at University of Ulm, West Germany
2010 - Present Visiting Professor at Department of Medical Research, SRM Medical College Hospital & Research Centre
2013 - Present Ph.D Supervisor at Sastra University
2014 - Present Honorary Professor at Division of Metabolic & Vascular Health, Warwick Medical School, University of Warwick, UK
2015 - Present Adjunct Faculty at Department of Biotechnology, Indian Institute of Technology Madras