Greg Dewey graduated from Anderson University in 1994 with a bachelor of arts degree in speech, theatre, and communications.
He coached volleyball in Indiana for eight years before moving to Oklahoma. While in Muncie, Indiana, Greg coached Delta High School to a career record of 189-43. Muncie, which has been a hotbed for volleyball in the United States for decades, once touted four schools in the USA Today top 25. Delta's highest ranking under Greg was 18th. He also coached for the Muciana Volleyball Club for four seasons leading the 17's to two third place finishes at the Junior Olympic National Championships.
Upon moving to Oklahoma, Greg volunteered with Will Ethridge at Santa Fe High School and Mark Herrin at UCO. In 2006, Greg's OP2 17's team qualified for the Junior Olympic National Championships and finished 38th at the tournament. During the 2006-2007 schoool year, Greg accepted an assistant head coaching position at the University of Tulsa.
In 2007, Greg founded and is the pastor of Skyline Church in Oklahoma City. In 2009, Greg was named the head volleyball coach at Heritage Hall. His wife of 17 years is Alicia and they have two children: Chase - 14 and Kadie Grace - 10.