As the same time, Tim Mellors, current Grey New York senior creative executive, was promoted to vice chairman and chief creative officer of the Grey Group to handle global creative efforts.
"Grey's client roster is packed with potential," said Myhren in a statement. "We're going to infuse more radical thinking into the mix and seek true integration across all media. It should be fun."
Myhren had been executive vice president and executive creative director of Leo Burnett Detroit for the past three years, overseeing all creative development for the agency, including the General Motors business.
Myhren help re-launch the Pontiac brand and helped devise new creative/media models, such as the branded entertainment effort on NBC's "The Apprentice" for the Pontiac Solstice a few years back. After that "Apprentice" episode, the automaker said it resulted in selling out a year's worth of cars in 40 minutes.