As a lawyer, Singh has had a distinguished career spanning over three decades.
In 2003, he was appointed as senior counsel by Central Government to conduct cases in the Bombay High Court for Union of India and also was appointed as special counsel to conduct cases for Brihanmumbai Municipal Corporation.
In 2010, Singh was elected as a member of the Bar Council of Maharashtra and Goa, by securing the highest votes in Mumbai. In 2011, Singh was unanimously elected as the chairman of the Bar Council of Maharashtra and Goa. In 2012, Singh was designated as senior advocate by Hon'ble Bombay High Court.
