John MacDonald

John is the Chief Technology Officer of GSR. Prior to joining GSR, he spent five and a half years at Citadel Securities, where he held various technology leadership roles, such as Global Head of Derivatives Technology and Global Head of Fixed Income Technology. Before that, he spent 10 years at J.P. Morgan, where he was a Managing Director, running the Global Electronic Market Making Technology group. He started his career at Goldman Sachs, before joining Citadel to build an Options trading business. John graduated from Oxford University with a degree in Mathematics & Computation.