Susana Tsui replaces Cheuk Chiang as PHD chief in APAC 23 May 2013 - PHD has appointed Susana Tsui as chief executive of its Asia-Pacific operations, replacing Cheuk Chiang who is taking up the post of chief executive, Omnicom Media Group APAC. DigitasLBi and Razorfish shake up international leadership 22 May 2013 - DigitasLBi and Razorfish have restructured their agency-specific international leadership, following the global merger of Digitas and LBi back in February 2013. AudienceScience appoints new CEO 22 May 2013 - Digital marketing technology company AudienceScience has strengthened its management team with the promotion of its president Mike Peralta to the post of chief executive. SMG’s Rayan Karaky adds emerging markets to remit 21 May 2013 - Starcom Mediavest Group (SMG) has promoted Rayan Karaky to the role of chief digital officer, MENA and emerging markets. Cheil hires former WPP exec Chris Chalk 20 May 2013 - Cheil Worldwide is boosting its senior management team with the appointment of WPP executive Chris Chalk as president, chief strategy officer for Europe. Glue Isobar unveils new creative line-up 17 May 2013 - Digital agency Glue Isobar has appointed Simon Clancy and promoted Lewis Raven and Adam King internally to create a new senior creative team. TubeMogul hires Nick Reid as UK MD 17 May 2013 - Video ad buying platform TubeMogul has appointed former IgnitionOne managing director Nick Reid as managing director of its operations in the UK. Mediacom appoints EMEA head of social media 16 May 2013 - Mediacom has appointed ZenithOptimedia’s Nick Burcher as its new head of social media EMEA, effective June 10. Mcgarrybowen London MD relocates to New York 16 May 2013 - Mcgarrybowen London managing director Ida Rezvani is leaving the agency to take up the role of managing director at Mcgarrybowen’s New York office. BBH taps Patrick Lafferty as North America CEO 15 May 2013 - Bartle Bogle Hegarty (BBH) has appointed Patrick Lafferty as chief executive of its operations in North America. He is expected to start this summer.