1982 - 1984 Assistant Professor ( Medicine ) at Command Hospital Air Force
1990 - 1992 Associate Professor ( Medicine ) at Command Hospital Air Force
1992 - 1994 Seniror Registrar ( Nephrology ) at Christian Medical College, Vellore
1994 - 1998 Associate Professor ( Nephrology ) at Command Hospital Air Force
1998 - 2001 Professor ( Nephrology ) at Command Hospital Air Force
2001 - 2003 Senior Advisor Medicine & Nephrology at Command Hospital ( Eastern Command )
2003 - 2013 Professor & Head ( Nephrology ) at St. John’s Medical College Hospital
2013 - 2014 Professor at St. John’s Medical College Hospital