He graduated from Ajou University and accepted an offer to join Pohang Steelers, making his professional debut.

He was traded with Jo Dong-Gun to join Seongnam Ilhwa Chunma, there he only played 9 games in 3 years, in 2013 he undergoing surgery and rehabilitation for a chronic injury.

After a year of rehabilitation Jae-Won made a comeback at Chungju Hummel, and moved to Daegu FC in 2016.

Due to his performance in the 2007 season, he was selected by then national team coach Huh Jung-moo in 2008 and made his debut against Chile.

Also he scored a dramatic equalizing goal in the 2011 AFC Asian Cup final between Korea and Japan in Qatar.