 In 1977, Kumar was sworn in as the Delhi Councillor by prominent social activist Guru Radha Kishan.He was first elected to the Municipal Corporation of Delhi at a time when only few congressman were able to win in Delhi, and was later appointed General Secretary, Pradesh Congress Committee (PCC), Delhi.In 1980, he elected to 7th Lok Sabha, and was a Member, Consultative Committee, Ministry of Works and Housing in the Lok Sabha.