In 1987, he landed his first credited television role in 1987 in FOX's sitcom Married... with Children. Two years later, he starred in his first feature film, Teen Witch where he played the title character's love interest. That same year, he landed his most high-profile primetime role as maverick helicopter pilot, Johnny McKay in CBS's Tour of Duty. Following the end of the series, Gauthier continued to make guest appearances such television shows as Who's the Boss?, Life Goes On and Silk Stalkings. In 1993, he was cast in the comedy film Son in Law. He played Travis, the main character's steady boyfriend who reacts unhappily to her changes from college life. By 1995, he landed a regular role on a series titled Courthouse. The show portrayed the trials and tribulations of court life. After nine episodes, the series was canceled. From 1996 to 1997, Gauthier found recurring roles on both Ellen and Beverly Hills, 90210. In 1998, he was cast in the prime time soap opera Melrose Place.