Dissinger, the 2012 Intercollegiate Women's Lacrosse Coaches Association (IWLCA) National Assistant Coach of the Year and the 2016 IWLCA Division III Berkshire Region Coach of the Year, was promoted to head coach of the team in June of 2014. She played a significant role in Trinity's unprecedented run of six-straight NCAA Division III Championship Final Fours from 2012-2017, including an NCAA Championship season in 2012. Dissinger was also a participant in the 2011 NCAA Final Four as a captain for Bowdoin College's squad. Trinity played in seven-consecutive NESCAC Finals from 2011 to 2017, and won the league title for the fifth-straight year in Dissinger's rookie year as head coach in 2015.

Dissinger guided the program to a pair of wins in 2019-20 before the novel COVID-19 pandemic cut the team's season short. The Bantams pulled off a season-opening win against Williams, and ended its shortened 2020 season with a perfect NESCAC record, upending Bates 12-11. In 2019, the Bantams fielded a young team that went 9-7 overall and 4-6 in NESCAC play. The team started off the year winning eight of its first ten games and finished at ranked No. 17 in the final IWLCA National Poll. Four of Dissinger's players were named to the IWLCA All-Region Squad.

The Bantams returned to the NCAA Elite Eight for the seventh straight season in 2018, finishing the season with a 13-7 overall record and a 6-4 mark in the NESCAC. Trinity earned an at-large bid to the NCAA Tournament where they defeated Springfield, 16-4, and Rhodes College, 20-11, before ultimately ending their season with a 9-8 loss at Salisbury in the quarterfinals. In the final poll of the season released by the Intercollegiate Women's Lacrosse Coaches Association (IWLCA), Trinity was ranked No. 8 in the country. Dissinger guided a Trinity team that boasted three All-Americans, five All-Region selections, four All-NESCAC honorees, and 13 NESCAC All-Academic selections. Senior goalie Zoe Ferguson highlighted the year by being named the IWLCA Division III National Goaltender of the Year and the New England Lacrosse Journal Division III Player of the Year, marking the second consecutive spring that Dissinger has coached a national player of the year.

In 2017, Dissinger led Trinity back to the NCAA Final Four, as the Bantams posted a 17-5 overall record and 8-2 NESCAC mark.