Timmer Willing enters his eighth year as an assistant coach for the Tritons in 2011. He graduated from Truman State University with a degree in Exercise Science and Health Education. Thereafter he took classes at the University of Indiana for Kinesiology. He also received a master's in Teaching-International Relations at the University of San Diego in 2009.

Prior to coming to La Jolla to coach at UCSD, Willing assisted with the men's and women's tennis programs at Truman State, his alma mater, for two years. Afterward, he worked as the Men's Assistant Coach at the University of Indiana for two years.  During the time at Indiana University, he was part of the program which hosted the Big Ten Championships, had a NCAA Qualifier for a doubles team at the NCAA Individual Championships for Indiana losing to eventual champions from Stanford. After leaving the University of Indiana he became the lead coach at the Weil Tennis Academy in Ojai, California. As the lead coach at the Weil Tennis Academy, Timmer was the coach and trainer for numerous tour players. His expertise in the sport have helped various players to win national championships and achieve national ranking.

Since he started working as the Women's and Men's Assistant Coach for UCSD, he has been a integral part of the coaching staff.  He is constantly looking to improve the level at which the players are performing and raise the bar for future players. Timmer consistently has a great attitude on the court that encouraged success and confidence.  Timmer hopes to continue coaching tennis in the future to  help young individuals reach the highest potential possible.