Jonathan has coached runners of different abilities from the beginner to the national class athlete. He has coached on the personal, group, and high school levels. Jonathan currently trains runners individually as well as in a group atmosphere. His runners range from teens to seniors. He was a distance track coach at Kamehameha Schools for 10 years and since 2008 has been an assistant girls cross country coach for Iolani School. Jonathan was also the Hawaii coach for the Leukemia and Lymphoma Society's Team in Training Marathon program from 1996-2013. He is one of Hawaii's most accomplished runners and a former Hawaii State high school track champion (1982). Jonathan has completed nearly 40 marathons and has been a 17x top local born(Kamaaina) in the Honolulu Marathon from 1993-2004, 2006-2009, and 2012. He is the 1994 and 2002 Great Aloha Run champion. In 2009, he was inducted into the Honolulu Marathon Hall of Fame. He has run 1500m in 4:00.3 on the track and on the roads he has best times of 1:09:06 in the half marathon and 2:29:25 in the marathon.