Coach Gauthier graduated from The John Carroll School in 1971. She went on to excel at the University of Maryland as a two sport athlete in Field Hockey and Lacrosse were she graduated from in 1975. Her coaching careeer began at Edgewood High School were she was a Field Hockey, Girls Lacrosse, and Swim coach for 4 years. She returned to her alma mater in 1990 as the Field Hockey coach were she spent 22 years leading the program. In 1996, she joined the faculty at JC were she continues to work to this day. In her time at JC, in addition to teaching, Tess has also been one of the Deans and was an Assistant Athletic Director for Women's Athletics. After finishing her Field Hockey coaching career at JC, Coach Gauthier start a brand new Badminton program, which has had great success over the years winning the 2013 and 2014 IAAM B Conference Championship. Her contributions to the John Carroll Athletic Program were recognized as she was inducted into the John Carroll School Athletic Hall of Fame in 2013.