• by Steve McClellan  @mp_mcclellan, March 29, 2012

Monica Karo has been tapped to replace Andrew McLean as CEO of PHD US, the shop confirmed today. 

In addition, the agency is bulking up on senior management with the addition of two new positions, including a president of its New York office, Steve Williams, and chief operating officer, Craig Atkinson.

Karo was previously president of integrated accounts at Omnicom Media Group, PHD’s parent company. She will retain that role as she adds the PHD CEO duties, the agency said. Williams has been CEO of OMD UK and Atkinson was president and chief digital officer at PHD US.

Karo will report to both Page Thompson, North American CEO Omnicom Media Group and Mike Cooper, global CEO of PHD.

McLean’s departure was reported earlier today.