Tan confirmed the move, but would not comment further on the news.
The highly regarded executive has spent 17 months running GroupM Malaysia as well as Singapore, an additional role he was handed following the departure of former GroupM South and Southeast Asia CEO Andre Nair.
The highly regarded executive has spent 17 months running GroupM Malaysia as well as Singapore, an additional role he was handed following the departure of former GroupM South and Southeast Asia CEO Andre Nair.
Mark Patterson, GroupM's Asia Pacific COO, said the search was underway for a successor, and would be interviewing internal and external candidates.
"Henry is an outstanding individual," said Patterson. "He has been one of our most accomplished leaders. He was there at the formation of MindShare and has served the network brilliantly for 10 years. He will be a hard act to follow."
Astro is one of Southeast Asia's largest commercial radio, satellite television and magazine publishers, with operations in Malaysia, Brunei and Indonesia.
