1966--1967 Research Fellow, Osmania Medical College, Hyderabad
1966--1967 Lecturer in Chemistry, SRAS College, Kothagudem,A.P.
1967---1969 Junior Scientific Assistant, (DAE Scheme ) Dept. Of Biochemistry, Osmania University, Hyderabad-500 007. A.P.
1970---1972 Junior Research Fellow (Dept. Of Atomic Energy), Dept. Of Biochemistry, Osmania University, Hyderabad-500 007. A.P
1973---1974 Senior Research Fellow (CSIR) Dept. Of Biochemistry, OsmaniaUniversity.
1974—1980 Lecturer in Biochemistry, Dept. Of Biochemistry, Osmania University, Hyderabad-500 007. A.P.
1981---1988 Reader, Dept. Of Biochemistry, Osmania University.
1989—2009 Professor of Biochemistry, Dept. Of Biochemistry, Osmania University.
1984---1986 Fogarty International post doctoral fellow of NIH, U.S.A Dept. Of Biology, New York University,New York
1987---1989 Visiting Research Scientist, Dept. Of Biology, New York University, New York, U.S.A.
1992---1992 Visiting Professor, Dept. Of Biology, New York University, New York.
1990---1992 Head, Dept. Of Biochemistry, Osmania University. Hyderabad - 500 007.
1992---1993 Chairman, Board of Studies in Biochemistry, Osmania University.
1993---1995 Head, Dept. Of Biochemistry, Osmania University, Osmania University.
1995 – 1997 Chairman , Board of Studies in Biochemistry Osmania University.
