Jack Seibald is a Managing Director and Global Co-Head of Marex Prime Services, where they focus on expanding prime brokerage and outsourced trading capabilities while prioritizing client service. With 40 years of experience in financial markets, they have held key positions in several reputable firms, including Cowen, Concept Capital Markets, and Blackford Securities. Jack played a significant role in the acquisition of Cowen's Prime Brokerage by Marex in December 2023, and their team has been consistently ranked among the top Prime Brokers globally. They earned an MBA in Finance and Investing from Hofstra University and a BA in Economics and Spanish Language and Literature from The George Washington University.
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