MEET OUR TEAM
William Mondello
William Mondello is a transformative leader with over 15 years of experience turning vision into results, leading P&L and teams across international markets. He grew Brand USA in France from obscurity to industry leader over eight years, generating $200M+ in business value through strategic activations and high-impact partnerships (Air France, NFL, Veepee), while founding Mondello Enterprise in 2021 to advise global firms on business development, with transferable expertise to luxury and FMCG sectors.
At the intersection of strategy, P&L management, and creative storytelling, he builds bridges between cultures, industries, and teams—with impact and elegance. A HEC Paris Executive MBA graduate (2022, Jury’s Distinction), he excels in shaping cross-industry strategies and building networks.
His career highlights include marketing management for Santa Monica Travel (positioning as exclusive luxury vs. mass-market Los Angeles), program management at BNP Paribas for innovation and digital initiatives across 36 countries, communication coordination for the City of Paris, and operational roles at Disneyland Paris. As a Franco-Italian with a strong transatlantic network, he bridges French and American industries, facilitating partnerships and growth in premium sectors.
He lives in Paris with his American wife and cat.
Marion Certain
Marion has evolved in the Tourism industry for the last 7 years, after spending 3,5 years abroad in Alaska, Canada and Australia.
Marion has actively supported American and Canadian territories - at local, regional and national levels - in their development in European French-speaking markets. Currently serving as the Manager Trade, France for Brand USA, Marion’s former tenures include working for Bonjour Québec, Philadelphia Convention and Visitors Bureau, Royal Commission for AlUla (Saudi Arabia), Atout France and the Tech Tour Operator Worldia.
Marion holds Economics and Tourism Management degrees from University of Paris 1 Panthéon-Sorbonne and Excelia Business School.
Proud Canadian Permanent Resident, Marion is currently living between Paris, Normandie and Canada, offering her knowledge, creative marketing skills and connections within French, Canadian and American industries to businesses and public organizations.
OUR STRATEGIC PARTNERS
Geoffrey Duval
With 25 years of experience in tourism, communication, business, and the arts, Geoffrey Duval is a seasoned professional in the industry.
Prior to joining Mondello Enterprise, Geoffrey took on dual roles as a Digital Editor and Publications Director for the magazine Voyages et Stratégie while continuing to consult for various tourism and other sector companies. Geoffrey served as B2B Sales Director for Royal Caribbean Cruises, and Project Manager and Partnership Director for PONANT, a luxury cruise company, where he was recruited to launch the Alaska destination. He spent 10 years as Sales Director for the tour operator Jetset Voyages. Geoffrey began his career as Travel Manager and Seminar Coordinator for the Carrefour Group before moving on to become a Sales Manager for Vacances Air Canada, the tour operator of the airline.
A significant highlight of Geoffrey's career is his 12-year tenure on the board of Visit USA in France, including six years as President. During this time, he promoted the United States to B2C, B2B, and media audiences, managed the annual budget, developed and implemented the annual communication and marketing plan, and maintained relations with the press, professionals, the U.S. Embassy in Paris, and the U.S. Tourism Office.
After living in South America during his childhood, Geoffrey now resides in Paris where he indulges his passion for theater by regularly performing on stage.