 In 2010, Seo joined the coaching staff of the senior team under manager Cho Kwang-rae.Since 2012, he has been a member of the coaching staff of the Suwon Samsung Bluewings, becoming the club's manager in 2013.Under his tenure, the Bluewings finished the 2014 and 2015 seasons as runner-ups and won the Korean FA Cup in 2016.