By FOX Sports staff
Despite hailing from Adelaide, the 25-year-old has never played professional football in Australia having began his career at English side Newcastle, where he was briefly on the cusp of the first team but never played a senior game.
Troisi then spent time in Turkey with Genclerbirligi and Kayserispor, making almost 100 appearances in the Super Lig before joining Atalanta at the start of last season.
But having failed to establish himself at the Italian club, Troisi has now agreed to join Victory on loan in a bid to force his way back into the Australia team for next summer's FIFA World Cup in Brazil.
And his new coach Ange Postecoglou was delighted to add a player of his quality to the already-impressive attack at AAMI Park.
"Throughout his time in Europe, James has shown that he has the talent and attributes to compete at the highest level of club football," he said on the club's official website.
"At just 25, James is in the prime of his career, so we are extremely excited about what he will bring to Melbourne Victory.
"He obviously has a desire to get back into the Socceroos set-up, and there's no better way to state his case than to have an impressive A-League season."
Troisi is Victory's second big-name signing in recent days, after the club unveiled Chile international defender Pablo Contreras as their international marquee player for the upcoming campaign.