Molly Cahill was named Assistant Coach of the Women's Senior National Team in April 2022. Cahill was part of the USA Water Polo Mountain Zone where she coached in the Olympic Development Program while also serving on the Women’s Junior National Team staff. Previously part of the UCLA Women’s Water Polo staff from 2008-2017, Cahill helped guide the Bruins to 12 NCAA Tournament appearances including an NCAA Championship.

A standout player at UCLA, Cahill was part of three NCAA Championship teams in Westwood before embarking on a coaching career that saw her mentor six Olympians. No stranger to club water polo, Cahill coached age-group squads with Los Angeles Water Polo Club, Bruin Stars & Stripes, and most recently Colorado Pirates Water Polo Club.

Cahill resides in Seal Beach with her husband Cooper O’Connor and three children, Oliver (born June 2016), Arlo (born August 2018), and Archer (born June 2021).