 Jung Sung-ryong attended Gwangju Elementary School and went on to graduate at Seogwipo Middle School and Seogwipo High School.At one point at his time at Tamna University, Jung Sung-ryong was named the best player in the national championships in 2002 after helping Tamna University win the title.In January 2003, Jung Sung-ryong signed his first professional contract with Pohang Steelers after graduating.