Seongnam confirmed the 33-year-old Australian centre back, who led the club to the 2010 AFC Champions League title, would be leaving on Saturday.

"I leave Seongnam kind of out of blue but I won't forget the team that gave me glorious trophies and so many things," Ognenovski told the club's website.

"I will always support Seongnam even though I will be far away because they are my team."

Along with the 2010 ACL title, Ognenovski also lifted the 2011 Korean FA Cup and won the 2010 AFC Player of the Year award while with Seongnam.

Ognenovski's new club Umm Salal finished 11th in Qatar's Stars League last term, only retaining their top flight status after winning a relegation playoff.