At a young age, he was a huge fan of Odd Moseby and Trond Schea, who raced Anglias, Lotus Cortinas and Escorts in the sixties and seventies.
He started racing in September 1972 along with Martin Schanche. One of their instructors was 10 times Swedish Champion, Erik Berger.
his first race was in January 1973 on a frozen lake (ice racing) in a group 2 Escort Mexico taking a surprising win.
He bought an Escort Mexico, which was converted to a RS2000 specification in 1974. He won his first Norwegian Hill Climb Championship with this car in 1976. He then aquired an Escort RS 2000 Mk II which was supplied directly from Ford.
He raced his three Escorts in hill climb, ice racing, rally and on horse tracks with great success up to 1982.
Trond Schea, the famous Norwegian racing driver from the sixties, decided in 1982 to make his comeback in motor sport and bought Matheson's Mk II RS 2000.
During the next six month Matheson borrowed different racing cars, NSU TTS Group 5 (Geir Tørmoen) and an Escort RS group 2.
In 1983 he bought an Escort Mexico Mk I that had been imported to Norway in December 1971.
The car was rebuilt with a group 2 Pinto engine and successfully raced until 1997.
In 1997 the car was upgraded with a 2.0 BDG and full group 4 specification. He has over 100 victories with this well know car.
Matheson has won the Norwegian Championships six times (1976, 1980, 1985, 1986, 1988 and 1992).