Ryan Castle will begin his second year as the assistant coach with the Arizona State University water polo program. Assigned to assist the coaching staff with day-to-day activities such as practice and travel, Castle also serves as the head coach of the ASU men's club team that placed third at the 2008 National Collegiate Club Championships. Castle also competed with Sun Devil Head Coach Todd Clapper at the 2007 U.S. Maters Championships, where their team won the national title.
Castle came to Tempe with a wealth of coaching experience. Prior to arriving in Tempe, Castle coached the South Irvine Water Polo Club during the 2006-07 season and helped the team to a ninth-place finish at the Junior Olympics. Also in 2006, he was selected as an assistant coach for the Waterpoloplanet.com/Turbo European All-Star Select Team that competed in the Junior Olympics and finished fourth.
In South Africa, Castle was an assistant coach (2003-05) with the South African Senior National Team while also serving as the head coach of the National `B' Team in 2004. In 2003, he was selected as the coach of the South African Youth National team as well as the Western Province region's senior provincial women's team head coach in 2003 and the men's team in 2004, which finished second in the Currie Cup. Also in 2003, he guided the University of Cape Town women's team to a bronze medal at the 2003 South African University Aquatics Championships.
Starting in 1997, he coached at Wynberg Boy's High School for five years before taking over at Reddam House College in 2002. Between 2001 and 2005, he served as the provincial age group boys and girls teams coach for the Western Province region.
A native of Cape Town, South Africa, Castle graduated from the University of Cape Town with a degree in Information Systems in 2001 and a post graduate Credential in Education in 2003. He is currently working toward his Master's degree in Physical Education at Arizona State.