Katelyn played lacrosse at both Hopkinton High School, and Bentley University. She served as an assistant coach at Dover-Sherborn high school for 3 years, before taking over the program as head coach in 2014. In her 4-year tenure at DS, she has helped head the Raiders to a 56-25-3 record, including 4 straight MIAA tournament berths. In 2015, DS made it to the DII East-Sectional semi-finals.

In 2018, Katelyn was named the head coach at her alma mater, Hopkinton High School. In both the 2018 and 2019 seasons, she led her squad to the MIAA tournament.

Katelyn currently teaches kindergarten in the Hopkinton school district.