he was elected as m.l.a from rampurhat (vidhan sabha constituency) in 2001 and subsequently re-elected from same constituency in 2006, 2011 and 2016. banerjee first time sworn in as a minister of state under chief minister mamata banerjee in 2014 and allotted the independent charge of department of ayurveda, yoga and naturopathy, unani, siddha and homoeopathy. the next year he was nominated for minister in charge for department of biotechnology, department of statistics and programme implementation, planning.