Scott Johnston

Scott is the Chief Administrative Officer of Citadel. As CAO, Scott works with the Chief Operating Officer to manage business controls and drive efficiency across the global organization. Prior to becoming CAO in 2018, Scott served as Chief Operating Officer of Citadel Securities.

Scott joined Citadel Securities in 2017 from Tower Research Capital, where he was a partner and COO responsible for business development, operations and business management. Prior to joining Tower, he was Managing Director and Chief Information Officer at the Chicago Mercantile Exchange (CME), responsible for GLOBEX and clearing technology. During his time at the CME, Scott was a member of the management team that led the exchange through demutualization and an IPO in 2002.

Earlier in his career, Scott worked at UBS as Managing Director in Foreign Exchange and Interest Rates and later as Global Head of Treasury Products Technology. He was also a software developer, options trader and business manager with O’Connor and Associates, and started his career in financial services as a senior programmer with Townsend Analytics.

Scott is a graduate of the University of Michigan.