Scott Rubner, a Goldman Sachs (NYSE:GS) veteran known for his bold stock market predictions, is joining market maker Citadel Securities' institutional derivatives segment, according to a media report dated Tuesday.

Scott Rubner, a managing director in the derivatives sales and macro execution team at Goldman Sachs, has left the investment bank, a source familiar with the matter told Reuters on Monday. Rubner had joined the Wall Street giant in 2015.

Citadel Securities hired Goldman Sachs Group Inc.’s Scott Rubner, who has turned heads on Wall Street with prescient calls on equities markets, to help go toe-to-toe with banks in catering to hedge funds and other big traders.

Scott Rubner, Goldman Sachs Group Inc.’s managing director for global markets and tactical specialist, has left the bank after almost a decade at the firm, according to a person familiar with the matter.