Doyle won the lightweight event (under-56 kg) at the 1990 Commonwealth Games, beating Australian Suzanne Williams in the final. It was Scotland's first judo medal at a Commonwealth Games. She came second in the under-52 kg event at the 1991 European Judo Championships, losing to Jessica Gal in the final. Doyle won the under-52 kg event at the 1992 European Judo Championships in Paris, France. Doyle was not selected for the 1992 Summer Olympics.