| School Union Councillor, Government High School, Cherthala, Alappuzha, 1956-57 |
| Students Union Secretary, Government High School, Cherthala, Alappuzha, 1957-58 |
| General Secretary, (i) Cherthala Taluk Committee, Kerala Students Union, Cherthala, Alappuzha, 1957-58, (ii) College Students Union, Maharajas College, Ernakulam, 1962-63, (iii) Kerala Pradesh Congress Committee (K.P.C.C.), 1969-73 and (iv) All India Congress Committee (A.I.C.C.), 1984-87 |
| Treasurer, Kerala Students Union, 1963-64 |
| Treasurer (Acting), A.I.C.C., 1994-95 |
| President, (i) Kerala Students Union, 1964-66, (ii) Kerala Pradesh Youth Congress Committee, 1966-69 and (iii) K.P.C.C., 1973-77, 1978-82 and 1987-92 |
| Convenor, State Liaison Committee of the Ruling Coalition, Kerala, 1970-77 |
| Member, (i) Congress Working Committee since 15 April 1992, (ii) Central Disciplinary Action Committee, A.I.C.C. since 17 February 1993 and (iii) Central Election Committee, A.I.C.C. since 12 February 2001 |
