Marsh & McLennan, the insurance broker accused of bid-rigging has appointed Brian Storms chairman and chief executive officer of Marsh, its risk and insurance services subsidiary, and Michael Caulfield president of Mercer human resource consulting.

Storms was previously president and chief executive of the firm's human resources division. He succeeds Michael Cherkasky, who took over as chief executive of the parent company after Jeffrey Greenberg resigned following an investigation by New York attorney general Eliot Spitzer.