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 communications partner at Wilmer Cutler Pickering Hale and Dorr, will serve as the FTC's general counsel.