Sean O'Sullivan is a highly experienced professional in sportsbook operations and trading, currently serving as Senior Director of Sportsbook Operations and Risk at PENN Entertainment, Inc. since June 2025. Previously, Sean held the position of Director of Sportsbook Trading Operations at Penn Interactive, where a trading operations team was built from scratch to a team of 16. Prior roles include Senior Sportsbook Trading Manager at Flutter Entertainment Plc and Trading Assistant & Employee Development Manager at Rational Group, where responsibilities encompassed hiring, real-time risk processes, and team management. Earlier experience includes leadership roles at Paddy Power Betfair, focusing on football trading and risk management, and initial exposure to the gambling industry as a cashier. Sean earned a Bachelor of Science (B.Sc.) in Environmental Science from University College Cork in 2010.
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