Sitepu was inaugurated as a member of the Provisional People's Consultative Assembly, representing the Functional Groups, on 15 September 1960.

[3] During his tenure as the governor, Sitepu fully supported the inaugural Games of the New Emerging Forces, held in Jakarta.

The demonstrators accused Sitepu of appropriating funds for the construction of a public toilet in North Sumatra's central market.

[6] After the crackdown against the movement, Sitepu fled Medan, the capital of North Sumatra, on 8 September 1965 to Kabanjahe in Karo.

The researchers pointed out that there is no conclusion whether Sitepu was arrested because he gave political advantages to members of the Indonesian Communist Party or because he was trusted by Sukarno.