In 2007, Tiley turned professional. Having failed to reach the final stage of the
European Tour qualifying school, he gained his card on the
Asian Tour. Tiley had three top 10 finishes during his first season, but finished just outside the top 65 on the Order of Merit that was required to retain his playing status. Tiley began the 2009 season on the Jamega Tour, a UK-based developmental tour. After a strong start, winning three tournaments, he started to play in some events on the second tier
Challenge Tour. Later in the year he won the
Egyptian Open, a Challenge Tour specially approved tournament prior to it becoming a full tour event in 2010. Since 2010 Tiley has played mainly on the
Challenge Tour. He qualified for the
European Tour in 2011 and 2017 but had little success and returned to the Challenge Tour. He did not win on the Challenge Tour until July 2019, when he won the
Le Vaudreuil Golf Challenge, although he has been runner-up four times before that, in 2010, 2013, 2016 and 2018. ==Professional wins (6)==