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Jean Guillaume R. is currently working at Castleton Commodities International as the Head of European Physical Gas trading. Prior to this role, Jean Guillaume held positions as a Gas Trader at Koch Supply & Trading and as a Derivatives sales trader IR/FX at Compagnie Benjamin de Rothschild. With a strong educational background in Mathematics, Economics, and Finance, including a MSc in Operations Research from Columbia University, Jean Guillaume has a solid foundation for their work in Fixed Income & Currencies.