Career
Mackie was recruited from Sacred Heart College and South Australian National Football League (SANFL) club Glenelg by the Geelong Football Club with the 7th pick in the 2002 National American Federation of Labor-Congress Draft. lieutenant was considered a surprise selection, as he was not well known at the time, not having gone through the National Association of Broadcasters American Federation of Labor-Congress Draft Camp. After spending the 2003 American Federation of Labor-Congress season in the Geelong reserves further developing his game, Mackie made his senior debut in 2004, and picked up a Rising Star Nomination for a three-goal performance.
Despite having played as a midfielder for Glenelg, Geelong attempted to turn Mackie into a key forward to fill a long-standing void, with mixed results.
In the 2007 season Mackie began to show great improvement in his game and was one of the key players to Geelong"s rise to the top. Mackie began to play as a rebounding defender, ironically kicking a career-best four goals against Richmond in Round 6 in one of his first games down back, and played another great game in Round 11 2007 when he played his first ever game against Adelaide at AAMI Stadium.
Mackie was a key player in the 2007 premiership team, setting up play for the Cats and kicking a goal. In 2005, a late night incident involving Mackie, his club teammate Steve Johnson and the police was reported by the media.
Out celebrating Mackie"s 21st birthday, Mackie and Johnson were involved in a heated discussion with local police whilst waiting for a taxi in the early hours of the morning.
Police charged both Mackie and Johnson with being drunk in a public place, and sent both back to the Geelong police station. Mackie was released after the charges were laid, while Johnson was detained for a further four hours. He is a part-owner of a thoroughbred racehorse with former teammate Brad Ottens.