He succeeds Neil Hardwick, who is returning to the UK to take up a new role outside WPP.
Pandya was last associated with Zee5 as head of content acquisition and partnership.
Park will succeed Kookhyun Shim to spearhead the overall India operations.
Deshpande brings over 27 years of experience in the media and entertainment business.
Dahiya spent eight years at the company, spearheading various brand launches.