He is part of the 1974 batch of IPS officer and served as Director General in Uttar Pradesh Police.
[2][3] SN Chak retired as Director General of Police on 30 June 2011.
[citation needed] Chak published Samaj Sanjeevani magazines, journals and a directory of the Khatik community, GharDwar.
[7][8] He founded Desh Shakti Party, whose motto was to support the Constitution of India.
The party contested general assembly elections in Jharkhand in 2015 and in Uttar Pradesh in 2017 and organised protests, rallies etc.