The 34-year old Socceroos centre-back joins the Sky Blues as a free agent after departing Qatari club Umm-Salal at the end of last year.
"I'm delighted to be able to sign for Sydney FC," said the former Seongnam Ilhwa star.
"It is always good when you are wanted by a big club and Sydney FC are an iconic club in Australian football. It will be an honour to pull on the sky blue shirt."
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