Harder impressed in his first tournament of the 2024-25 campaign as he took home the “A” flight title of the inaugural NEC Invitational. The 2023 NEC Rookie of the Year defeated FDU’s Thomas Linley (6-2, 6-7, 10-5), Binghamton’s Filipe Costa (6-3, 6-4) and Saint Francis U’s Tyler Nguyen (4-6, 7-5, 1-0 Ret.), before beating fellow Shark Philip Hible (6-2, 7-6 (8-6) in the final. His singles draw victory secured him a spot in the ITA Conference Masters Championship in November with a chance to qualify for the NCAA Individual Championship this fall. Paired with Victor Sjostrom in doubles play, they defeated Binghamton’s Ronin Lotlikar and Kyle Weekes in the opening round of the doubles “A” flight (6-2) at the NEC Invitational before falling to a FDU doubles team in the quarterfinals.