Thebe entered student politics from Taplejung's Sinam School during the 2036 BS referendum. Thebe, who was directly involved in the people's movement of 2046 BS was then elected chief of the then Kumarkhod VDC.
He is currently the district president of the Congress and is considered close to Krishna Prasad Sitaula.
Thebe was also a candidate for the House of Representatives in 2070 BS. However, he was defeated by UML leader Lal Prasad Sawa Limbu. He is competing in the elections for the second time with his earlier rival.