|Jon Thiesen, J.T. as he prefers to be called, joined the FPU coaching staff in 2001-02, as a specialist in the horizontal jumps. In 2004 he joined the athletics staff as associate athletic director.
Thiesen graduated from FPU in 1996 and completed his teaching credential the following year at the university. He has spent the last 6 years as a math and computer teacher at Edison Computech Middle School in Fresno where he was also the cross country coach.
Prior to his arrival at FPU, Thiesen has coached varsity boys basketball at Immanuel High School with his father for 10 years. During this time the father/son duo amassed several valley championships and coached numerous state tournament qualifying teams. He also spent seasons as an assistant track coach at Dinuba High School and Immanuel High School.
Thiesen lives in his hometown of Reedley with his wife Shannae (Castellanos - FPU 1997). JT still competes in track and field (with Athletes In Action) where he is a 25-foot long jumper. He is coached by close friend and 1972 Olympic Gold Medalist in the long jump, Randy Williams.