Sheth will lead the global brand expansion at the company.
Her last held role with GroupM was as the chief strategy officer at Maxus Global.
The board elected ABP Network CEO Avinash Pandey as vice president.
Pradeep Dwivedi, Nandini Dias, Abhishek Karnani and Punit Goenka among office-bearers.
The organisation has announced the managing committee for FY 2021-22.
