Till had success early being named Rookie of the Year of the Houston Region of the SCCA in 1986. Not long after, he won the 1990 Atlantic Championship. In 1991, he joined the Indy Lights series and won the race at Mid-Ohio. In CART he ran 20 races, including the 1994 Indianapolis 500, where he finished 12th. Till had three top-ten finishes in CART competition.