National Railway Mazdoor Union is the largest recognized worker's representative of C.Railway chosen by the employees through secret ballot elections held in 2007 and subsequently in 2013. This union further have its privilege to be the single workers union of Konkan Railway Corporation Limited (KRCL) repeatedly elected by KRCL employees through secret ballot elections in the past.

This union apart from striving it's best to achieve the demands and to protect the rights and privileges of the workers of CR & KR , it plays an inevitable role to mitigate the exploitation of contract workers engaged in railways and to protect their interest to the maximum extend possible.