Koh (pictured) joined the firm in 1999 as a member of the consumer research team and was most recently an executive director at the company.

She replaces Paul Richmond who has been moved to managing director of retail services and product leadership for the region.

In her new role, Koh will report to Christophe Cambournac, Nielsen’s president for Asia Pacific, India, Middle East and Africa and be responsible for overseeing the firm’s consumer group in Singapore.

Cambournac said: “Joan possesses unwavering energy, which combined with her professionalism and disciplined approach have enabled her to develop strong relationships with some of the company’s key clients.”