[1] He joined Scottish non-league side Buckie Thistle in 2004, and played for them in the Highland Football League for one year prior to his move across the Atlantic.
During his college years he also played with Des Moines Menace in the USL Premier Development League Souter was signed as a developmental player by Kansas City Wizards in May 2008 after impressing head coach Curt Onalfo during a two-day open tryout.
Souter was waived by Kansas City during the 2010 pre-season, and initially was selected by Seattle Sounders FC off the waivers list,[4] but was not offered a contract by the MLS club because their front office was targeting other international players.
[6] Having taken some classes at the university to allow him to play in 2010, Souter became the head coach of the women's team for the 2011 season, with Joseph staying on as an assistant until 2012.
In March 2015, Souter stepped down as head coach citing fatigue and a desire to move closer to family in Scotland.