Coach O'Halloran, a 2009 graduate of Union Catholic and 2013 graduate of Central Connecticut State University, has a very impressive 39-3 record through her first five years as head coach.
Under her direction, the Vikings haven't lost a conference meet in four years. In 2024, she led the Vikings to a second-place finish in the Non-Public B Boys State Championship, the first state final appearance for UC as a co-ed team!! And it was the first state final for the UC swim program since the girls' team captured a third straight state championship in 1982.