Former Socceroos striker John Aloisi has been appointed as the new coach of A-League club Melbourne Heart for the next three seasons.The club chose the 36-year-old Aloisi ahead of fellow Heart assistant coach Ante Milicic.Aloisi replaces inaugural Melbourne coach John van `t Schip, who stepped down after leading the Heart through their first two seasons in the A-League.Aloisi is the only Australian to have played in the world's best three domestic competitions - the English Premier League, Spain's La Liga and Italy's Serie A.Aloisi, who was the Heart's youth team coach in 2011-12, said he had learnt a lot from Dutchman van `t Schip over the last 12 months."When I retired here just over a year ago I didn't expect to be the head coach within a year," he said."I enjoyed the experience with the youth team and when this came along I thought it was a great opportunity to get into the head coaching role."Aloisi expects Milicic to remain on the Heart's coaching staff, despite expected interest from the new western Sydney A-League franchise."We're good friends off the pitch too," said Aloisi."Ante is an integral part of this club."Aloisi said he believed the Heart had the most exciting young squad in the A-League.They have already re-signed 15 players for next season and hope to have their squad finalised by the time pre-season training begins in June.