Bastien holds a master’s degree in Finance from Paris 1 Panthéon-Sorbonne and a Master's degree in Banking & Financial Engineering from Toulouse Business School. He began his career in mergers and acquisitions involving listed companies at Crédit Agricole CIB and Credit Suisse in Paris. Wishing to work with entrepreneurs, Bastien worked with investment banks such as HK Finance and Mansartis, mainly on transactions in the Education, Training and Personal Services sectors.

Bastien joined La Baume Finance in 2021.