Mathieu Guyot-Sionnest

Mathieu Guyot-Sionnest was born and raised in Paris, France before moving to sunny California in 2016. With pretty much his entire family working in the Real Estate business in France, Mathieu was able to learn the ropes of the industry early in his life especially by witnessing and assisting at various client visits.

While doing his Masters Degree in International Business, Mathieu was working part-time at a commercial Real Estate company while simultaneously developing a project of his by opening a vintage motorcycle workshop in Paris.

Upon arrival in the US, Mathieu kept sourcing cars and motorcycles on behalf of European clients before entering Bonhams Auctioneers as a Motorcars and Motorcycle Specialist. Mathieu then joined Broad Arrow Auctions in fall 2022, which became Hagerty in 2023. Meanwhile, Mathieu worked on several real estate projects, both in Europe and in the US, particularly for car collectors' clients needing home comprehending the right logistic components to store collections of 10+ cars.

Still active in the collectible car world, you will probably meet Mathieu at various events both in the US and Europe; Mathieu is a Judge at several official ICJAG concours such as the prestigious San Marino Concours in Pasadena, CA and an veteran vintage car racing driver having notably raced twice at Le Mans Classic in France.

Drawing on his background with auction houses specializing in collectible and one-of-a-kind assets, Mathieu excels at meeting the demands of clients who expect nothing short of exceptional service.