Across 128 NCAA Division I games with the Princeton Tigers, Koelzer scored 100 points and was a Patty Kazmaier Award finalist in 2016 and 2017.

[10][11] She would appear for Team Decker in the Dream Gap Tour exhibition in Philadelphia during the 2019–20 PWHPA season.

[12] In September 2019, she was hired by Arcadia University as head coach for the new women's hockey programme.

[14] Along with Melissa Parnagian, she campaigned for the introduction of the Willie O'Ree Congressional Gold Medal Act.

[15] On March 25, 2021, she was appointed to the role of Advisor to the Commissioner on Diversity, Equity, and Inclusion for the NWHL.