Eleven promoted Ben Freer to mixer; AJ Murillo to mixer; Benjamin Tomastik to staff assistant mixer and hired Melissa Elston as client relations and facility coordinator.

Entercom Communications hired Jeff Miller as vice president/general manager of SmartReach Digital.

8th Street added Andrew Baird to its directorial roster.

Siteworx hired Mike Gilpin as chief technical officer.

Humble hired Shannon Lords as executive producer in Los Angeles.

Moe’s Southwest Grill hired Dominic Losacco as vice president of global marketing.

R/GA tapped Barry Wacksman as executive vice president, global chief strategy officer. In his new role, Wacksman will assume global responsibility for all 3 of R/GA's strategic functions: Planning, Analytics and Business Transformation, while continuing to lead the global business development team. Based in New York, he'll continue to report to Bob Greenberg, R/GA's founder, CEO and chairman. "I look forward to gaining tremendous synergy by assigning these critical, thought-leading departments and capabilities under Barry, who has a proven track record of pioneering strategy and innovative approaches to connecting brands and consumers," said Greenberg. In addition, Matt Tepper, currently vice …

Critical Mass hired Andrea Lennon as general manager for the Asia Pacific Region. Lennon will handle agency operations, leadership on existing client relationships and new business development. She will be based in Singapore and report to John McLaughlin, chief operating offer of Critical Mass. Lennon joins the agency from WPP, where she served as executive vice president, consumer brand lead overseeing omni-channel brand communications work for Bank of America. Prior to that, she was group account director at R/GA, serving as client lead for McCormick & Co. "Andrea's appointment comes at a crucial time as Critical Mass' global client relationships …

UK-based media planning and buying agency, Arena Media, hired Elliot Parkus as managing partner and promoted Mark Holden to head of strategy. Parkus will work on the recently won Royal Mail account and serve as senior resource leader on core clients including Domino's. Most recently, Parkus worked as UK group director of planning at The Specialist Works, where he was responsible for establishing the planning and client management division, and launching new services, including The Mobile House. Prior to that, he worked at Publicis Groupe agencies ZeninthOptimedia and Starcom MediaVest, where he was responsible for managing clients including BMW, Scottish …

Big Spaceship named Andrea Ring as chief strategy officer, a new position at the Brooklyn-based agency. Ring starts her new position on July 20 and will report to Michael Lebowitz, founder and CEO of Big Spaceship. As chief strategy officer, Ring will be responsible for leading Big Spaceship's strategy discipline. Ring joins Big Spaceship from R/GA, where she served as senior vice president of planning/experience planning. During her 10-year stint, Ring built a team of 40 planners with skills ranging from building products and services to storytelling. Ring worked with brands such as Nike, Google, and Samsung, helping clients rethink …