O'Leary enters his first season with the track & field program in 2017-18.
A 2016 graduate of UVM with a degree in biology, Thomas was a four-year member of both the cross country and track & field teams. He served as a two-year captain for cross country and captained the track & field team as a senior.
A middle distance track runner, O'Leary holds the school record in the mile with a time of 4:07.12. Additionally, he was on the record holding DMR relay team (9:52.16) and the 4x800m relay team (7:35.49).
In addition to coaching, O'Leary works in a University of Vermont biology lab.