Accentmarketing promoted YARELI ESTEBAN to group vice president, management supervisor; SERGIO RODRIGUEZ to vice president, group creative director; CHRISTY SCHIFFER to vice president, group account director; and KURT KRUGER to group account director, Chevy regional advertising and fulfillment.

Avenue A | Razorfish Los Angeles named JASON WANG as a technology director.

Discovery Communications named BRAD SINGER its senior executive vice president and chief financial officer. He joins the company from American Tower Corporation, where he most recently served as chief financial officer and treasurer.

TIMOTHY CASTREE joined MediaVest as executive vice president, managing director. Castree will lead MediaVest's AORs for Mars and Wendy's. Most recently, Castree served as managing director and CEO of Leo Burnett Sydney, where he worked with such clients as Procter & Gamble, McDonalds and Subaru.

STEPHEN MOORE joined IAC Ad Solutions as director of sales, western region, from BusinessWeek, where he served as Southern California manager.

LevLane Philadelphia hired KATIE ROSE THORNTON as account manager on the Taco Bell account.

SUSAN LYNE has stepped down from her posts as president and chief executive officer at Martha Stewart Living Omnimedia. Replacing her as co-CEOs are WENDA HARRIS MILLARD, currently president of media, and ROBIN MARINO, president of merchandising.

JAY WOODRUFF was named editor in chief of Maxim.com, the digital companion to Maxim magazine. Woodruff was most recently managing editor of EW.com.

Creative Civilization named SERGIO H. SALINAS as executive vice president. Most recently, Salinas served as executive vice president and general manager of Hearst Corporation's, San Antonio Express-News.

Euro RSCG Worldwide named PHIL BUEHLER as chief market scientist. Prior to joining Euro RSCG, Buehler was the director of account planning at mcgarrybowen, where he oversaw strategic planning services for Chevron, Verizon and Marriott.