Credit Suisse Group AG named Boon Sim as its new global head of mergers and acquisitions as part of a broader management shake-up amid hopes of a rebound in takeovers next year.

The overhaul shuffled duties for five of Credit Suisse's top bankers around the globe, according to an internal memo distributed Monday. It also comes as the bank has seen a spike in work on major takeover deals including helping to finance Kraft Foods Inc. on its $17 billion hostile bid for Cadbury PLC.