R. K. Singh is a native of Supaul district in Bihar. He was the district magistrate in East Champaran and Patna in the 1980s before joining the state home department in 1997. During the Nitish Kumar government's term from 2004–2009, Singh, as principal secretary in the road construction department, played an important role in improving the condition of roads in Bihar. In the National Democratic Alliance-led government, the then Home Minister, Advani, selected Singh to work as joint secretary in the Home Ministry for five years from 1999 to 2004. In 2019, He contested and won the Arrah parliamentary constituency with a margin of over 5,00000 votes.
Disclaimer: The information relating to the candidate is an archive based on the self-declared affidavit filed at the time of elections. The current status may be different. For the latest on the candidate kindly refer to the affidavit filed by the candidate with the Election Commission of India in the recent election.