Ripon College Athletics

Koster is in her ninth season as an assistant volleyball coach at Ripon College. She joined the Red Hawks' coaching staff in 2017 and helped guide the team to an appearance in the Midwest Conference Tournament during her first season.

A 2017 graduate of Ripon College, Koster was a three-sport student-athlete for the Red Hawks, competing in volleyball, basketball, and softball. During her collegiate volleyball career, she helped the Red Hawks reach the Midwest Conference Tournament in 2013 and 2015.

A Ripon, Wis., native and Berlin High School graduate, Koster also serves as the Director of the Willmore Center and Athletic Facilities at Ripon College. Her responsibilities include overseeing facility operations, scheduling, budgeting, event management, and supervising more than 90 student employees.

Koster earned her master's degree in Sport Management in 2026.