Derek Ryan is a retired Irish professional squash player and former UNSQUASHABLE sponsored player who in a distinguished career achieved a highest Professional Squash Association (PSA) World Ranking of No.7. A former Irish No.1, Derek has been capped a record 200 times by his country and remains an UNSQUASHABLE brand ambassador.

Ryan was born in Dublin(born 10 December 1969). He began playing squash along with his brother Noel, as his parents both played. Living in Killiney he played at various local clubs including Squash Ireland and from the age of 14 he played league squash with Sandycove TSC. Ryan was ranked first in Ireland by the age of 19.

He completed his school Leaving Certificate and went on to study accountancy which he discontinued after a year. Aged 19 he joined the Tour and went to play professionally.

After a successful international career as a professional player, including appearing a record 188 times for the Irish national team, he retired from the professional circuit in 2002. He continued to play national squash with Fitzwilliam, the current Irish champions and studied Physiotherapy at the University of Salford. Ryan now practices as a Physiotherapist in Dublin.