Jonathann graduated from the University of Paris IX Dauphine with a master's degree in International Markets and Finance.

After working as a portfolio manager at Cirne International, Jonathann joined a large independent private bank, AISM, where he held the position of Vice President responsible for the strategic development and sales of derivatives, structured funds, equities and hedge funds in Europe, Asia and the Middle East.
In 2006, he founded LS Advisors to offer clients the benefit of his financial expertise on a fully independent basis.

Yann is a graduate of the DESS Assas-Finance program at the University of Paris 2. After working at Paribas and Citibank, he joined Merrill Lynch in Paris at the end of the 1990s, where he successively held the positions of key account relationship manager, sales & sales-trader portfolio trading, sales of equity derivatives, hedge funds & asset managers, sales of structured products to private banks and FdF, and sales of UCITS funds. In 2009, he was appointed head of sales for derivatives, structured products and funds in France. In particular, he was involved in the launch of the first ETFs in Europe (Global LDRS) in 2000, the Merrill Invest platform in France (Certificates) and the first UCITS hedge funds (known as Newcits) in the world in 2006 and, finally, the Merrill Lynch range of commodity funds in Europe in 2009.

Séverine holds a post-graduate diploma (DEA) in Money-Finance-Banking from the University of Paris II-Assas. She spent most of her career at Société Générale Asset Management, where she held marketing and institutional sales positions in both traditional and alternative investment management. She was then appointed Director of External Distribution in France and Monaco, before setting up the Consultant Relations department in Europe. After 12 years at SGAM, she focused on the selection and distribution of absolute return funds such as TPM, then was responsible for the development of a management company in Luxembourg, before joining LS Advisors as Managing Director in 2014.