The 29-year old spent more than a week trialing with Sydney recently and found the net with a skilful free kick in the Sky Blues' 4-0 friendly win over State Premier League side Manly United on a rain-soaked night at Cromer Park last week.

He comes to Sydney FC after seven years and 134 appearances in the K-League, most recently with Jeju United, with whom he played 25 matches in 2008.

"I was made feel very welcome by players and staff at Sydney and am excited to be given opportunity to join the team," said Sung-Hwan.

"Sydney is strong side with many quality players and I look forward to competing for first time in the A-League. I believe it will be very successful season."

The new recruit is currently home in Korea making preparations for the move to Australia and will rejoin his new team-mates next week.

Sydney FC will finalise their roster with the signing of at least one more player in the coming weeks before kicking off the 2009/10 Hyundai A-League campaign on the road against competition newcomers, North Queensland Fury on August 8.