Besides him, Ashis Kumar Saha, who had won from Bordwali assembly seat in a by-poll held there on May 28, was named as Working President of the party's state unit.
Saha, who was the chairperson of Agartala Municipal Council, is a chemical engineer from Jadavpur University, Kolkata.
Congress had lost badly to CPI-M led Left Front in the assembly election in the state on February 14 this year.
CPI (M)-led Left Front retained power in the state for the fifth time in a row while Congress could bag only 10 seats in the 60-member assembly.