John Shirk enters his ninth season with the Aztec volleyball coaching staff. His coaching resume spans all levels from club volleyball with Club Pacific girls' volleyball and Seaside boys' volleyball to a brief time with USA Volleyball in 1995 as a volunteer coach under Fred Sturm. Shirk also runs the Aztec Summer Volleyball Camps and is co-director of Club Pacific.
Prior to joining the Aztecs, Shirk spent the 1996 and 1997 seasons as associate head coach for the Lady Griffins of Grossmont (Community) College. He also was the first assistant at Grossmont from 1992 to 1995, serving in a similar capacity with the school's men's team in 1992 and 1993. During that span, he helped the women's team to three consecutive Pacific Coast Conference championships.
Since 1994, Shirk has coached club teams which have competed in both the USA Junior Olympics and the prestigious Davis Festival.
A native San Diegan, Shirk earned all-state honors as a middle blocker at Grossmont College during the 1991 and 1992 seasons. He has competed in open tournaments all over California in doubles, four-person and six-player formats, both indoors and on the grass.
Shirk graduated from San Diego State University in 1998 with a teaching degree in kinesiology. He completed a master's degree in kinesiology in August 2005.