Sebastien is a very reliable and trustworthy expert in equity derivatives and finance. He has the ideal profile for structuring, combining two rare qualities: a strong business sense together with an excellent technical background. He quickly distinguished himself at JPMorgan by assimilating concepts at a fast pace while designing innovative products, including very innovative hybrid transaction or his fundamental work on new generation flow equity derivatives. His papers on Variance and Correlation Swaps made a definitive impact on the profession by bridging the gap between advanced theory and its implications for trading in a very accessible way.
— Martin Bertsch