Philip Yarrow has been competing in and winning squash tournaments for almost 30 years. He was a member of the under-19 junior squad in his native England. While attending Nottingham University, he was both the English Universities and British Universities champion. His school's team won the English Universities Team Championship in all three years of his time there. Philip moved to the United States in 1991 and won the National Amateur Championships in 1992 and 1993. At that time he was also building one of the best squash programs in the country as head squash professional at Chicago's Lakeshore Athletic Club. Philip is a certified coach with the English Squash Rackets Association, a certified referee in England and the United States, and a certified referee instructor in the United States. Aidan Harrison has been heavily involved in squash since he first picked up a racket at the age of eight.

Originally from Yorkshire, he captained the England under-19 junior team in 1990, which won the World Junior Team Championships, and he finished third that year in the individual event. Aidan turned professional at age 16 and played on the squash tour for five years, reaching the top 50 in the world rankings. In 1993, he moved to Dallas to coach full time. He was head coach of the U.S. national junior women's team, leading it to a highest-ever fourth-place finish in the World Championships in 2001. At the same time, he was the personal coach to Michelle Quibell, who became the first American junior to win a British Open title. In 2002, he received the U.

S. Olympic Squash Coach of the Year award. Aidan is a certified coach with the English Squash Rackets Association, a certified Spinning instructor and a personal trainer. He is currently the head squash professional at the Onwentsia Club in Lake Forest, Illinois, one of the most prestigious country clubs in the United States.