Zemoga hired Andres Navarro as managing director, based in the company's Bogota, Colombia, office. Most recently, Navarro was Mediabrands' chief digital officer of Latin America.

Alyson Brown joined the New York Office of Vector Media as an account executive. Brown was most recently an account executive at Kinetic New York.

Doug MacDonald has been named vice president, digital for the Newspaper National Network.

Cramer-Krasselt promoted Karen Seamen to the new post of chief operating officer. Seamen will continue to serve as general manager of C-K's Chicago headquarters.

DDB Canada hired Ed Lee as director of social media to lead Radar DDB. He joins DDB Canada from Veritas Communications, where he served as managing director.

Pixorial named Ari Kaufman as CEO.

DataXu hired Beth Gregg as director of sales, based in San Francisco and Jesse Cozart as director of sales, based in New York.

Cartoon Network promoted Josh Feldman to senior vice president of ad sales, overseeing client relationships for the television and new media platforms supporting Cartoon Network and Adult Swim.

Joshua Brandau was named acting media director for Pereira & O'Dell. Brandau, who joined Pereira & O'Dell's strategy group in May 2009, oversees all mediums of purchase with an expertise in partnership negotiations.

JWT New York promoted Eric Weisberg and Tom Christmann to executive creative directors, Howard Lenn to creative director, and Aaron Padin to head of art.