- Research Associate, Florida State University, Tallahassee, Florida, USA 1968-1971.
- From 1972 to 1984, Head of the division of natural products at Hoechst Pharmaceuticals' Basic Research Centre in Mumbai, India.
- From 1984 to 2002, a professor at the Indian Institute of Technology's departments of chemistry and biomedical engineering.
- Honorary Professor, 2003, Institute of Chemical Technology Department of Chemistry.
- Head, Professor (Adjunct), Laboratory for Advanced Research, KET’s V. G. Vaze College, Mulund, Mumbai, India, 2004 Onwards.