CSFB is expected to announce Wednesday that Chuck Ward, co-head of investment banking, will move from New York to London, while other senior bankers will be freed to spend more time with clients.
The shake-up comes less than two weeks after John Mack, the former Morgan Stanley executive, was appointed CSFB chief executive. But the bank said the moves had been planned several weeks before Mack's arrival.
Ward and Tony James, CSFB's other investment banking co-head, will divide up regional responsibilities.
The reshuffle will also see Chris Carter, CSFB's head of investment banking in Europe, become chairman of global investment banking with a remit to spend more time on developing client relationships.
Carter will be replaced by James Leigh-Pemberton, deputy co-head of European investment banking. Richard Gillingwater, the other deputy co-head, will become chairman of European investment banking.