Tuki was born in a Nyishi family on 7 July 1964 in Ompuli, Sagalee sub-division, Papum Pare district.

[4] Tuki served as state National Students' Union of India president (1983 to 1986) and was the Chairman of North East NSUI Coordination Committee (1984 to 1986).

[4] He was first elected to the second legislative assembly in 1995 from Sagalee constituency and served as the deputy agriculture minister in the Gegong Apang ministry.

[4] He was re-elected to the assembly in 1999 from the same constituency and became a cabinet minister with the environment and forest portfolio in the Mukut Mithi ministry.

In December 2021, a special court at Yupia accepted CBI's closure report of the investigation after the allegations of corruption against Tuki could not be proved.