Guillaume is a fintech executive with a record of growth and accomplishments in both entrepreneurial and large corporate environments. He is currently the COO/CMO and Co-Founder of Extend, a platform backed by renown investors such as Point72 and Plug & Play, that enables banks, fintechs, and their customers with digital credit card distribution capabilities. 

Prior to cofounding Extend, Guillaume was the head of American Express’ Corporate Payments Global Consulting Business, advising clients on how to optimize their business payments. During his 12-year tenure at American Express, Guillaume ran different global organizations, including Innovation & Partnerships, Data Products & Solutions, Business Transformation, and M&A Integration.  As a leader of the Strategic Planning Group for 5 years, Guillaume also advised the CEO and the C-Suite on capturing business opportunities and addressing complex business challenges. 

Earlier in his career, Guillaume was a marketer and product manager at Capital One in the US before joining the team that spearheaded the inception of the business in France.  Guillaume is a Board member and Chair-Elect of the MIT Sloan Club of New York; he lives in New York City with his wife and three children.