In 2015 he and Sunder Singh Verma attended the Fifth India Region CPA Conference.

He has held various significant positions, such as Parliamentary Secretary from 18 April 2005 to 18 August 2005, Chairman of the Subordinate Legislation Committee from January 2013 to March 2013, and Deputy Speaker of the Himachal Pradesh Vidhan Sabha from 12 March 2013 to 21 December 2017.

In his fifth term, Jagat Singh Negi was elected to the State Legislative Assembly in December 2022.

An active sportsman during college days, Jagat Singh Negi represented Haryana in the National Junior Hockey Championship in Madras in 1977.

He was also part of the winning DAV College, Chandigarh team in the Punjab University Inter-College Hockey Championship in 1977-78.