Former Citigroup dealmaker Michael Klein has been handed control of Credit Suisse's investment banking unit, along with two other top jobs, after the Swiss bank agreed to pay $175m for his 40-person boutique.

Klein, who was previously on Credit Suisse's board of directors and is a key architect of the spin out of its investment banking business, has been named chief executive of banking, head of its Americas operation and CEO designate of CS First Boston — the new, rebranded dealmaking unit.