Investing.com - David M. Solomon is not simply co-president and co-chief operating officer at Goldman Sachs (NYSE:GS). Now, he's probably the next boss at the Wall Street firm, since Lloyd Blankfein, the current chairman and CEO, may step down as soon as the end of this year, according to the Wall Street Journal. Solomon became the frontrunner when Harvey M. Schwartz, who currently shares the two executive positions with him, suddenly announced he'd be retiring in April.If Solomon in fact gets the job, it will cap the Wall Street career of a man who didn't even study economics at college.Instead, Solomon,55, earned a B.A. in political science from Hamilton College in 1984. Skipping the Ivy League MBA so common on Wall Street, Solomon did stints at Irving Trust, Drexel Burnham Lambert and Bear Stearns before joining Goldman as a partner in 1999..At Goldman, Solomon has served as head of the financing group and co-head of investment banking. He was promoted to his current positions in 2016, after Gary Cohn left the firm to serve as chief economic advisor to President Trump.When not on the job, Solomon likes to perform as a disk jockey under the name "DJ D-Sol" at fashionable clubs in New York, Miami and the Bahamas, according to The New York Times. He also collects fine wine. Solomon is a trustee of his alma mater and a board member of the Robin Hood Foundation, New York's largest poverty fighting organization