Guillaume has over 30 years in the energy industry, primarily in the oil and gas sector. Prior to his current role, Guillaume was the chief executive officer of Lithium de France, a new energy company leveraging technology innovation in the energy transition space, from September 2021 to March 2025. Previously, he served in various senior leadership positions in the oil & gas industry with Schlumberger (SLB), including vice president of marketing & technology between April 2018 and September 2020, and vice president of production services between July 2014 and April 2018. Guillaume began his career in 1994 as a wireline field engineer with SLB and later held international roles across operations, sales, manufacturing, and technology development. Guillaume holds an engineering degree from École Polytechnique in Paris, France.