 He was also selected as the Austrian Footballer of the Year by two Austrian media "Kurier" and "" in 2005.After South Korea's head coach Pim Verbeek resigned in July 2007, Seo entered the list for the vacant managerial position for the national team.From 2009 to 2010, he and his former national teammate and close friend, Hong Myung-bo, worked together as a part of the coaching staff for the South Korea under-20 and under-23 team.