Shortly after returning to Portuguesa, Héverton was again on his way out on loan as he agreed to join Korean club Seongnam on loan until June 2012. He made his K League Classic debut on 16 July 2011 in a match against Jeju United where he also opened the scoring in the 19th minute, the match ended 2–2. He went on to make 12 appearances in total for Seongnam whilst scoring an impressive six goals from midfield. Seongnam finished the season in 10th but qualified for the 2012 AFC Champions League as winners of the 2011 Korean FA Cup. In the club's 2012 Champions League run, Héverton scored twice (both against Nagoya Grampus) in five appearances as Seongnam qualified for the Round of 16 before getting eliminated by Bunyodkor. He made seven further appearances in all competitions for Seongnam before going back to his parent club Portuguesa.
