In January 2013, Ruiz made his Top 14 debut, taking charge of Stade Montois's home game against Toulouse. That same year, he was selected to officiate in the 2013 Rugby World Cup Sevens in Russia. In late 2013, he made his European debut, refereeing Mogliano against Bath in the 2013–14 European Challenge Cup. In January 2014, Ruiz became the first French referee to officiate a Pro12 match, taking charge of the Italian derby between Zebre and Benetton Treviso.