Ben-Brahim is an engineer and mathematician by education. He graduated from École Centrale Paris (1987), studied Artificial Intelligence at the Max Planck Institut Munich, and received an MBA from INSEAD Fontainebleau (1990).
Early in his career, Ben-Brahim served as a Treasury Officer at the European Bank for Reconstruction and Development (EBRD) in London.
In 1994 Ben-Brahim joined Goldman Sachs. During his tenure he ran several businesses including global macro proprietary trading and emerging market trading and principal investments. He became a partner in 2004. News reports indicate he was one of Goldman's highest paid traders. 
In 2008 he was hired by GLG Partners, London’s second-largest hedge fund. Ben-Brahim developed and manages the Atlas Macro fund platform and ran the Atlas Value and Recovery investment fund until its spin off from GLG in 2011.
Ben-Brahim has a personal interest and is an active investor in technology and education. He is a partner of Zakoura Education and serves on the board of EMpower, charitable organizations focused on improving the lives and education of young people in developing countries.
Ben-Brahim is married to Heli Amin. They have three children.
- "City trader's £30m record bonus", BBC News, 18 January, 2004
- “Ben-Brahim to Quit Goldman Sachs for GLG,” “Financial Times,” 7 July 2008.
- “Goldman Star Trader Defects to GLG,” “Financial Times,” 7 July 2008.
- “Hedge fund bears win bets in euro crisis,” “Financial Times,” 5 October 2011.
- “Ils nous soutiennent,” “Zakoura Education.”
- “EMPower Underwriters,” “EMpower.org.”
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