Nirmal Singh is an Investigation Officer with the Haryana Police, based in Karnal, Haryana. A longtime friend of advocate Romil Chaudhary, the two entered Bigg Boss 12 in September 2018 as a commoner jodi — the 'Policeman and Lawyer Jodi' — under the season's 'Vichitra Jodis' format. Nirmal was one of the earlier evictees of the season, leaving in week 2 after 13 days, finishing eighteenth, while Romil went on to finish fourth.
Entering Bigg Boss 12 (2018) as the 'Policeman' half of the 'Policeman and Lawyer Jodi' with his friend Romil Chaudhary.