After being at the helm of the fair trade regulatory body for over four years, he had superannuated on January 7.
Chawla's appointment would be effective from January 15, Cyril Amarchand Mangaldas said in a release today.
He would be joining Infosys Co-Founder N R Narayana Murthy, HDFC Chairman Deepak Parekh, Kotak Mahindra Bank Executive Vice Chairman and Managing Director Uday Kotak, who are already advisory members.
Others on the board are Janmejaya Sinha, Chairman of Boston Consultancy Group (BCG) - Asia Pacific and Umakanth Varottil, Assistant Professor, Faculty of Law in National University Singapore.
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On his new role, Chawla said: "It is my pleasure to be part of the distinguished advisory board of Cyril Amarchand Mangaldas and I look forward to be contributing to firm's growth."
"They (board) will guide the firm in making the best use of its resources, and achieves its ambitious vision to its fullest potential," the release said.