Bradley Bondi, head of the securities enforcement and investigation group at Cadwalader, Wickersham & Taft, has joined Cahill Gordon & Reindel in a rare dip into the lateral market by the latter Wall Street firm.

Reached at his new office at Cahill in Washington, D.C., Bondi declined to comment on the circumstances surrounding his decision to leave Cadwalader. At Cahill, Bondi will head the firm’s securities enforcement and regulatory group and work out of its offices inside the Beltway and New York. Cahill has another outpost in London.