Frank Lowenstein, the staff director of the Senate Foreign Relations Committee and chief foreign affairs adviser to chairman Sen. John Kerry, D-Mass., is leaving the Hill and taking on a principal's role at the Podesta Group.
Lowenstein will advise multinational clients trying to expand in the United States and abroad.
Lowenstein worked for almost a decade on the Hill, helping get a new START treaty ratified, negotiating Iran sanctions and responding to recent events in North Africa. He also served as director of national security policy for Kerry's 2004 presidential campaign.
Also heading to the private sector is former D.C. mayor Anthony Williams, who is joining the international law firm McKenna Long & Aldridge LLP as a senior strategic advisor. He served as mayor from 1999 to 2007. Before that, he was the District's CFO and he CFO for the Department of Agriculture during the Clinton administration.