Leong takes the place of Chris Skinner, who will relocate to Dubai in a regional role with the network.
Leong joins Mediabrands after nine years with Leo Burnett Hong Kong. She joined in 2004 as general manager and stepped up as managing director in 2009. She left the agency earlier this year in July and is currently in the UK on sabbatical.
In her new role, Leong will report to Prashant Kumar, president of IPG Mediabrands, and is expected to bring an alternative view to the business. "She fits perfectly into our DNA yet can augur new perspectives," said Kumar.
Prior to Leo Burnett, Leong worked with a string of creative agencies over the course of her 18-year career including Bates, JWT and Ogilvy & Mather and has built up experience in digital, shopper marketing, direct marketing, event PR and promotions.
Skinner, who has been MD of Mediabrands Hong Kong for the past six years, will move to Dubai at the end of the year to take up the post of regional managing director of UM Middle East and Africa.
Prashant Kumar, president of IPG Mediabrands World Markets Asia congratulated Skinner on building the Hong Kong office up from a team of 30 to nearly 90, coupled with a strong client portfolio. "We wish him our absolute best in the new role. We in the Asia community will surely miss him."