David&Goliath promoted Brian Dunbar to president and Colin Jeffery to chief creative officer.

Troy Ruhanen was named president and CEO of TBWA Worldwide. Ruhanen succeeds Tom Carroll who will continue as chairman of TBWA Group. Jean-Marie Dru will continue to serve as chairman, TBWA Agency Network.

MC2 hired Martin Knott as president of the southwest division, which includes Las Vegas, San Francisco and Kingman, Arizona. In addition, MC2 promoted William Foster to vice president of the southwest division.

Discovery Communications promoted Rick Holzman to general manager and executive vice president of Animal Planet.

Cronin and Company hired Joslyn McArdle as account executive, public relations and promoted Bridget Cordero to assistant account executive, public relations.

Curse hired Gabriel DeWitt as vice president of monetization. DeWitt was most recently a senior technical director, media and operations, at SAY Media.

Creative director Marcel Ziul and executive producer Joe Nash have founded STATE Design, a boutique design and animation studio, based in Los Angeles.

Kris Kohl joined Digitaria's San Diego office as a senior producer. Lindsey Williams and Jill Regan also joined the office as associate producers. All three will work across a variety of accounts including Brand USA, Kia, Ironman, Johnson & Johnson, USA Triathlon, and The Princeton Review.

AOL Advertising hired Jason Jahn as head of agency marketing.

Essence tapped Joseph Tomasulo as global chief financial officer, Mark Nancarrow as global chief operating officer, and Claire St Louis as global chief people officer.