Dorjee Khandu was in the Indian Army Intelligence Corps and worked there for more than seven years. He received a gold medal for the meritorious intelligence services rendered during Bangladesh War. Later, he was engaged in social activities for village people of Tawang District and looked after their welfare up till 1980. In 1980, he was selected uncontested as the First ASM and worked in same capacity till 1983.
1982: Chairman, Culture and Co-operative Societies in those years. Due to enthusiastic efforts, cultural and co-operative societies established in Tawang and lead the cultural troupe representing Arunachal Pradesh in Delhi for ASIAD in 1982 and won silver medal for good performance.
1983–87: Elected uncontested as District Vice President, West Kameng District Zilla Parishad 1983–87.
1987–1990: Engaged in intensive social works and brought water......