<sod >Â  Following 12 years at the helm, he is one of the longest-serving bosses on Wall Street and helped navigate the bank through the financial crisis.< eod>< sod > Â  After 12 years at the helm of one of the most prominent investment banksÂ in the world, the 63-year-old is among the longest-serving bosses on Wall Street and helped navigate GoldmanÂ through the financial crisis.< eod>