Between 1902 and 1904, he worked for the car firm Lorraine-Dietrich, with Ettore Bugatti.
In 1904, Mathis and Bugatti designed the Hermes car, which for some reason was known as the "Burlington" when sold in England.
Mathis founded his own car company in 1910 and the following year was a protagonist of the small, multi-cylinder engine, probably inspired by Bugatti.
[1] In 1907, Mathis developed a large factory in Strasbourg, where his cars were later made.
During the Great Depression, Mathis looked for a partner for his firm and eventually chose Ford of America in 1934.