With limited North American interest, Harty signed his first full professional contract in France with Ducs d'Angers of the Ligue Magnus on June 12, 2012.[2] In re-uniting with previous junior Silvertips assistant coach Jay Varady,[3] Harty competed in 18 games with the league-leading "Ducs" (=
long-eared owl) to compile two goals and 11 points in the 2012–13 season.
On June 1, 2013, Harty left the French league as a free agent and signed a one-year contract with Swedish HockeyAllsvenskan club, Mora IK.[4] On June 23, 2014, Harty signed a one-year contract with fellow HockeyAllsvenskan team IF Björklöven.[5]
After spending a second season in the French Ligue Magnus with Brûleurs de Loups, Harty left as a free agent to sign a one-year contract with Slovenian outfit, HDD Olimpija Ljubljana of the Austrian EBEL on July 8, 2016.[6]