| 1970-73 |
President, Pradesh Youth Congress Committee,Kerala |
| 1973-75 |
General-Secretary, Indian Youth Congress |
| 1975-79 |
General-Secretary, Pradesh Congress Committee (Indira)[P.C.C.(I)], Kerala |
| 1980-82 |
Member, Kerala Legislative Assembly;Minister for Industries, Kerala |
| 1982-86 |
President, P.C.C. (S), Kerala |
| 1991 |
Elected to 10th Lok Sabha;Member, Joint Parliamentary Committee equired `Security Scam` |
| 1995-96 |
Member, Standing Committee on Finance |
| 1996 |
Re-elected to 11th Lok Sabha (2nd term) |
| 1996-97 |
Member, Committee on Transport and Tourism |
| 1996-98 |
Member, Panel of Chairman;Member, Estimates Committee |
|
;Member, Standing Committee on Power, Lok Sabha;Member, Consultative Committee, Ministry of Commerce |
| 1998 |
Re-elected to 12th Lok Sabha (3rd term);Member, Executive Committee, Congress Parliamentary Party (C.P.P.) |
| 1998-99 |
Member, Committee on Transport and Tourism;Member, Panel of Chairmen |
| 2009 |
Re-elected to 15th Lok Sabha (4th term) |
| June 2009 |
Member, Panel of Chairmen, Lok Sabha;Member, WTO Parliamentary Forum representing Indian Parliament |
| 31 Aug. 2009 |
Member, Committee on Energy |
| 4 Sept. 2009 |
Member, Committee on Security in Parliament Complex |
| 23 Sept. 2009 |
Chairman, Committee of Privilege |
| 27 Jul. 2010 |
Member, Standing Committee on Science & Techonology, Environment & Forest |
| 19. Oct. 2009 |
Member, General Purposes Committee |
| 1 Dec. 2009 |
Member, Joint Committee on Office on Profit |