With this, AICC will have a total of five spokespersons including Manish Tewari, Rashid Alvi and Renuka Chowdhary.
The announcement was made by AICC general secretary Janardan Dwivedi who is Chairman of the AICC media department.
Chacko is the Chairman of the JPC on 2G spectrum scam while Sandip is the son of Delhi Chief Minister Shiela Dikshit.
The media department of the AICC was running short of spokespersons for quite some time after the exit of Abhishek Singhvi in the wake of a CD controversy, elevation of Shakeel Ahmed to the Congress Working Committee and appointment of Mohan Prakash as general secretary.
With Rahul Gandhi set to play a larger role in the organization and the government, the reshuffle of the AICC secretariat is on the cards and expected within a fortnight.