McCann Worldgroup has promoted Brandon Cheung (pictured) to CEO, McCann Worldgroup Southeast Asia. Formerly the chief global client and growth officer of McCann Worldgroup, Cheung brings over two decades of strategic and digital expertise across brand building, performance marketing and customer experience to the role. With over 12 years within the network, Cheung is familiar with the Southeast Asia region where many of McCann Worldgroup's global clients have their APAC headquarters. In his new role, Cheung will report to Ghassan Harfouche, the president for McCann Worldgroup Asia Pacific and will be responsible for the continued development of capabilities to drive…