[4] Before that, he held the position of additional inspector general of the Bangladesh Police,[5] which is the second in command within the organization.
[7] While serving as Bangladesh's first mission deputy contingent commander in the US-led "Operation Uphold Democracy in Haiti" in the Western Hemisphere in 1994, he was awarded by the US Department of Defense's "Commanders Award for Public Service"[8] for outstanding performance.
During the Bangladesh Nationalist Party rule from 2001 to 2006, Tripura was denied promotion along with other religious minorities and people from Gopalganj District who were viewed as being loyal to the opposition Awami League.
[7] He was appointed in March 2007 as the national project director of the Police Reform Program and held the post until 6 October 2010, when he joined the Ministry of Foreign Affairs.
[12] Tripura was elected chairman of the International Centre for Integrated Mountain Development (ICIMDD) board of governors in 2016.
[citation needed] Tripura was the secretary[13] of the Ministry of Chittagong Hill Tracts Affairs from 16 June 2011 to 28 February 2018.