| Till 1977 |
Joint Secretary, Bharatiya Jana Sangh, Bihar |
| 1977 |
Elected to 6th Lok Sabha |
| 1977-79 |
Chairman, Sub-Committee on Hindi, Department of Steel and Mines;Union Minister of State, Steel and Mines |
|
;Member, Janata Party;Member, Consultative Committee, Ministry of Energy;Member, General Purposes Committee;Member, Consultative Committee, Ministry of Civil Aviation;Vice-President, Parliamentary Forum on Children;Vice-President, Parliamentary Forum on Water Conservation and Management;Vice-President, Parliamentary Forum on Youth;Vice-President, Parliamentary Forum on Population and Public Health;Vice-President, Parliamentary Forum on Global Warming and Climate Change |
| 1980 onwards |
Member, Central Working Committee, Bharatiya Janata Party (B.J.P.) |
| 1982-84 |
Member, Bihar Legislative Assembly ;Member, Tribal Welfare Committee |
| 1989 |
Re-elected to 9th Lok Sabha (2nd term) |
| 1990-91 |
Member, Committee on Science and Technology; and Environment and Forests;Member, Consultative Committee, Ministry of Industry |
| 1991 |
Re-elected to 10th Lok Sabha (3rd term) |
| 1991-93 |
Member, Committee on the Welfare of Scheduled Castes and Scheduled Tribes |
| 1992 onwards |
President, Tribal Cell, B.J.P. |
| 1994-96 |
Member, Committee on Urban and Rural Development |
| 1994-98 |
President, All India Scheduled Tribes Front, B.J.P. |
| 1996 |
Re-elected to 11th Lok Sabha (4th term) |
| 16 May-1 Jun. 1996 |
Union Cabinet Minister, Welfare |
| 1996-97 |
Member, Committee on the Welfare of Scheduled Castes and Scheduled Tribes ;Member, Committee on Energy |
| 1998 |
Re-elected to 12th Lok Sabha (5th term);Vice-President, B.J.P. |
| 1998-99 |
Chairman, Committee on the Welfare of Scheduled Castes and Scheduled Tribes; and its Sub-Committee on Monitoring and Implementation of reservation orders in respect of SCs and STs;Member, Committee on Food, Civil Supplies and Public Distribution; and its Sub-Committee-B on Department of Sugar and Edible Oils |
| 1999 |
Re-elected to 13th Lok Sabha (6th term) |
| 1999-2000 |
Member, Committee on Communications |
| 2000-2001 |
Member, Committee on the Welfare of Scheduled Castes and Scheduled Tribes |
| 2000- Sep. 2001 |
Member, Consultative Committee, Ministry of Mines and Minerals |
| 1 Sep. 2001 - 29 Jan. 2003 |
Union Cabinet Minister, Agro and Rural Industries |
| 29 Jan. 2003 - 09 Jan. 2004 |
Union Cabinet Minister, Coal |
| 9 Jan. 2004-22 May 2004 |
Minister, Non-Conventional Energy Sources |
| 2005-2009 |
Member, Jharkhand Vidhan Sabha |
| 2009 |
Re-elected to 15th Lok Sabha (7th term); |
| 8 Jun. 2009 |
Deputy Speaker, Lok Sabha |
| 04 Sep. 2009 |
Chairman, Joint Committee on Security in Parliament Complex |
| 10 Sep. 2009 |
Chairman, Committee on Budget |
| 23 Sep. 2009 |
Chairman, Committee on Private Members` Bills and Resolutions;Chairman, Library Committee |
| 19 Oct. 2009 |
Member, General Purposes Committee |
| 21 Dec. 2009 |
Chairman, Committee on Provision of Computers for MPs, Offices of Political Parties in Lok Sabha and Officers of Lok Sabha Secretariat;Vice-President, Executive Committee of Indian Parliamentary Group |
