The former Initiative India president will also run Aegis's Southeast Asia operation, and will be based in Mumbai. He will report to Patrick Stahle, CEO of Aegis Media Asia-Pacific.
Bhasin ends a 20-year career with Lowe Group, where he was latterly executive vice president and Asia-Pacific director of integrated marketing of Lowe Worldwide.
"Aegis has not been the big presence it should be in this part of the world, and I am relishing the challenge to help the network fulfill its potential," he said.
"I have been impressed with the people at Aegis, and I have a good feeling about the direction we're headed in. Media agencies increasingly need a brand perspective, and I hope to add value in that regard," he added.
Stahle commented: "Ashish has a good understanding of media, but also of the services media agencies are increasingly required to offer, such as CRM, sports marketing and events. He will be a great asset to the network."
Halmarick announced his departure after a ten-year spell with Aegis in February.
Bhasin ends 20-years of Lowe service, replaces Halmarick at Aegis Media
MUMBAI - Aegis Media has replaced outgoing South Asia chief executive Richard Halmarick (pictured) with Ashish Bhasin, who brings 20 years of service at Lowe India to an end.