Essence named Brian Krick as head of search and biddable, North America.

TheaterMania.com named Andy Slater as senior vice president of sales.

Geetika Bhandari joined the Wasabi Rabbit as account supervisor.

LKH&S promoted Christina Seiwert from account executive to senior account executive.

John Teter was named creative director at ignition.

Cramer-Krasselt hired Guy Overfelt as creative director of its Milwaukee office. Overfelt is moving to Milwaukee from San Francisco.

Kantar Media named George Pappachen executive vice president of strategy and business development for the Kantar Media Ad Intelligence group. Pappachen most recently was global strategy & business development director at WPP’s Data Alliance.

R/GA hired Daniel Diez as global chief marketing officer.

SapientNitro hired Valerie Carlson as executive creative director for its Los Angeles office.

Arnold Worldwide named Corey Mitchell, as president of its New York office. In addition, Mitchell will sit on Arnold Worldwide's Global Executive Committee and report to Robert LePlae, CEO of Arnold Worldwide. Most recently, Mitchell was head of MRM East North America and prior to that president of TBWA/Chiat/Day New York. The appointment coincides with the launch of the first brand campaign for 23AndMe, which recently appointed Arnold Worldwide NYC as its agency of record.