|Date of birth||June 23, 1979|
|Place of birth||Oreland, Pennsylvania, United States|
|Height||6 ft 4 in (1.93 m)|
|2001||-> Milwaukee Rampage (loan)||3||(0)|
|2013-2014||Philadelphia Union (assistant)|
|* Senior club appearances and goals counted for the domestic league only.
Jim grew up in Oreland, Pennsylvania and played high school soccer at Bishop McDevitt and college soccer at Villanova University. Curtin excelled at Villanova, being named the Big East Rookie of the Year his freshman year, and taking home first-team All-Big East selections his junior and senior seasons.
Following graduation, Curtin became the first Wildcat to be drafted by the MLS when he was selected by the Chicago Fire. Perceptions that Curtin was not athletic enough to play professionally, and the relative obscurity of Villanova, led to Curtin not being drafted until the third round of the 2001 MLS SuperDraft. He would go on to play in more than 200 games for the Fire, which included U.S. Open Cup championships in 2003 and 2006. He was a 2004 MLS All-Star and the March of Dimes/Comcast Athlete of the Year in 2005. In 2001, the Fire sent Curtin on loan to the Milwaukee Rampage in three early-season games and for the USL A-League playoffs. In his rookie year Curtin saw spot duty, starting 12 games and playing a total of 1194 minutes. In his second year, Curtin secured a starting spot on the team, started 22 games and played 2121 minutes. Curtin started every game for the Fire in 2003, playing alongside Carlos Bocanegra and helped the team's defense compensate for Bocanegra's loss in 2004. On January 22, 2008, he was traded to Chivas USA for a conditional pick in the 2010 MLS SuperDraft. Curtin was waived by Chivas USA on January 26, 2010.
On April 23, 2016 with a win over rivals New York City FC, Curtin became the most successful coach in Union history.