He also had to restock its talent pool , which had been badly drained with the high-profile departures of bankers like Felix G. Rohatyn , who led the financial rescue of New York City in the 1970 's and served as ambassador to France in the Clinton administration ; Gerald Rosenfeld , who is now the chief executive of the investment bank Rothschild North America ; Kendrick R. Wilson III , who is now a vice chairman of Goldman Sachs ; and Steven Rattner , who started the Quadrangle Group , a private equity firm .