| Previous Heads of the Department | Period |
| Prodipeswar Bhattacharyya | : 31 January 1996 - 19 January 1998 |
| S. Ponnusamy | : 21 January 1998 - 25 November 1998 |
| Meenaxi Bhattacharjee | : 09 February 1999 - 23 January 2000 |
| Rafikul Alam | : 24 January 2000 - 21 January 2001 |
| Meenaxi Bhattacharjee | : 22 January 2001 - 27 February 2003(FN) |
| Durga Charan Dalal | : 27 February 2003(AN) - 31 March 2006(FN) |
| Rafikul Alam | : 31 March 2006(AN) - 31 March 2009 |
| Rajen K. Sinha | : 01 April 2009 - 31 March 2012 |
| Bhaba Kumar Sarma | : 01 April 2012 - 31 March 2015 |
| Swaroop Nandan Bora | : 01 April 2015 - 01 April 2018 |
| N. Selvaraju | : 02 April 2018 - 03 January 2020(FN) |
| M. Guru Prem Prasad | : 03 January 2020 (AN) - 13 January 2021 (FN) |
