Galvin was previously UK commercial strategy director at WPP media division.
Eight regional leaders announced in addition to Justin Peyton.
New COO and VP boost regional office in Singapore.
Mohit Pise and Milla Chaplin join Myanmar agency, while Khin Myat Thu is promoted to chairwoman.
Ben McAneny, Reevi Rajan, Alvin Kirk, EJ Segovia and Vinay Devarapalli join the agency.
Allison Coley joins MEC Singapore, while Anita Munro is promoted at Maxus Asia Pacific.
Top news, insights and analysis every weekday
Sign up for Campaign Bulletins