WASHINGTON — The revolving door between the Federal Trade Commission and big firms is spinning briskly with news that former chairman Jon Leibowitz is joining Davis Polk & Wardwell as a partner and Deborah Feinstein will leave Arnold & Porter to head the agency's Bureau of Competition. In addition, Jonathan Nuechterlein, a partner at Wilmer Cutler Pickering Hale and Dorr, will serve as the FTC's general counsel.

For Leibowitz, who served as chair of the FTC from 2009 until February and as a commissioner from 2004-09, this will be his first stint as a law firm partner. "It's something new and interesting and challenging, and I think it will be really enjoyable," he said in an interview.