Competing as seniors domestically, they placed sixth at the 2018 U.S. Championships. As the top three American teams were assigned to the Olympic team, McNamara/Carpenter were sent to the 2018 Four Continents Championships in Taipei. McNamara/Carpenter placed fourth in Taipei, of which McNamara said "I think it went exactly the way we wanted, two strong, clean skates. I think it’s a good debut for us."