John Macdonald

Chief Technology Officer at GSR

John Macdonald is the Chief Technology Officer at GSR. John has held this position since December 2021. Prior to this, they were the Managing Director and Chief Technology Officer, Europe at Citadel Securities from July 2016 to December 2021. Macdonald has also worked as a Managing Director at JP Morgan from October 2007 to July 2016 and as an Options Market Maker at Citadel Investment Group from May 2004 to September 2007. John began their career in technology at Goldman Sachs, where they worked from July 2000 to April 2004.

John Macdonald's educational career would likely involve studying mathematics and computation at the University of Oxford.

They are on a team with Aman Bhalla - Director of Trading & Client Operations, Ravel Romero - Trader, and Jonathan Hugh - Chief Financial Officer. John Macdonald reports to Richard Rosenblum, Co-Founder and President.


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  • Chief Technology Officer

    Current role

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