Monster Worldwide Inc. appointed Mark Stoever as CEO, effective Dec. 1. He succeeds Tim Yates, who is departing Monster after serving as CEO for the last two years.

Yates will continue to serve on company boards and be active in private investments.

Stoever joined the company in July 2005 and currently serves as Monster’s president and chief operating officer.

“I can think of no one better to lead Monster,” Yates said. “Mark possesses a winning combination of indispensable knowledge of the recruiting marketplace, company, and its operations, with deep focus and broad leadership. He is eminently qualified to take on this role and spur a new era for Monster.”

Randstad North America, a subsidiary of Randstad Holding nv, acquired Monster on Nov. 1 for an enterprise value of approximately $429 million.

“I’m honored to lead Monster at this incredibly exciting time,” Stoever said. “With the support of Randstad, we now have a tremendous growth opportunity ahead of us. We are uniquely positioned to accelerate the transformation of Monster to deliver new and powerful ways to connect jobs and people. I look forward to working with this exceptional and dedicated organization to write the next chapter of Monster’s history.”