The 21-year-old defender joins Pune FC after spending three months with Delhi Dynamos and will be a valuable addition to Karim Bencherifa's side ahead of the upcoming Federation Cup and the I-League.
After completing formalities, new signing Munmun said, "I am very happy to have signed for Pune FC. I will play with my heart for the club and will give my best every time I step on to the field."
Ranchi-born central defender Munmun, began his footballing career with Simla Youngs FC as a youngster. Coming up through the ranks, he also represented Simla Youngs FC in the I-League 2nd division for a couple of seasons in 2010 and 2011.
The following season Munmun made his top-flight debut with United Sikkim and was a mainstay of their defense making a total of 24 appearances in the I-League 2012-13.
With United Sikkim relegated, Munmun made the switch to another newly promoted side Rangdajied United. Once again, he became an integral part of the defense making 18 appearances in the I-League and helped his team survive relegation despite having a poor start.