Colleen O’Reilly began teaching math and working in the girls’ dormitory at Indian Mountain in
2008. Over her tenure at IMS she has coached a variety of sports including, boys’ and girls’ soccer, ice hockey, squash, and softball. Prior to coming to IMS, Colleen worked at the Cardigan Mountain School Summer Program, attended St. Lawrence University and Teachers’ College at Columbia University. Currently, she is Dean of Students, Upper Campus Math Dept. co-chair, continues teaching math, works as an AOD residentially, and coaches girls’ soccer.

Colleen lives on campus with her family.