As a two-way forward, he helped the Black Bears reach the championship game in 2004 and was lauded by his coach for inspiring the team to victory after finding themselves down 1–4 to Harvard.
Ronan returned to Maine to finish his degree in 2013 and then worked as a volunteer assistant at Union during the Dutchmen's national championship run.
[2] The following year he became a full time assistant in the USHL before returning to the college ranks and eventually wound up back at Union.
He remained as an assistant under Rick Bennett until his former boss was suspended in January 2022 after allegations of improper coaching conduct.
After the season, Union decided to name Josh Hauge as the new head coach, however, Ronan was retained as an assistant with the Dutchmen.