Walker has most recently served as an age group coach for the University of Denver Hilltoppers program that also trains and competes in El Pomar Natatorium.
Allnutt is a Hawaii swim and dive alum, who has spent the last 10 seasons coaching in the Mountain West Conference.
After spending the last six years rebuilding the U.S. national team, Fuentes is returning to her home country of Spain to take a new coaching role.
Killion was on the U.S. National Swimming Team from 1984-1992, and on the US Olympic Team in 1992 for the 400 and 1500 meter freestyle.
A 2000 Sydney Olympian for Venezuela, Fuentes brings 18 years of coaching experience to St. Bonaventure.
Olympian Gideon Louw is the third addition to the Pitt coaching staff this season. He joins the program after six seasons at Auburn.
Brazilian Olympic medalist Bruno Fratus will coach at the club he formerly trained at alongside his wife, Michelle Lenhardt.
The 27-year-old joins the Tigers after his second straight appearance at the Olympics in Paris, placing 17th in the men’s platform event.