Arnab is a Director at IDIA. He completed his B.A. LL.B. (Hons.) from the West Bengal National University of Juridical Sciences (WBNUJS). Previously, he worked as a research associate of the IPR Chair at WBNUJS.

During his LL.B., Arnab worked to ensure minimum wages for all contract labourers of WBNUJS.

At IDIA, Arnab is the director-in-charge of the West Bengal, Jharkhand, Gujarat, Maharashtra and Goa chapters.