He is part of the Aam Aadmi Party and is a member of its national executive committee.
[1] Sadhu Singh was born in the village of Manuke Gill in Moga District in 1941.
He also taught the subject of English to paramedical classes at Baba Farid University of Health Sciences, Faridkot.
He was selected by Punjab Public Service Commission as a college lecturer in English in 1970.
[citation needed] Singh contested the 2014 Indian general election on an Aam Aadmi Party ticket from Faridkot constituency and defeated Shiromani Akali Dal's Paramjit Kaur Gulshan by 172,516 votes.