« I am an engineer and a professional driver. When I started to test drive the best cars with the best tires at Michelin, it was like chritsmas! » What is a tire tester’s job: day in day out, to push cars and tires to their limit on the track in order to test and improve them. Location: Based in Clermont-Ferrand, France but travels regularly to test tires on some of the best tracks in the world. Jerome Haslin, Chief Tire tester. With MICHELIN since 1992.