He began competing for his home country in international competitions in 2008. Lefkaritis competed in the 2012 Winter Youth Olympic Games in Innsbruck. In 2013, he trained with Cyprus representatives in Ushuaia, Argentina before training for slalom racing in Cortina d'Ampezzo, Italy. After competing in the 2013 FIS Alpine World Ski Championships he sustained an injury (anterior cruciate ligament tear); he suspended training for three months to recover. In February 2015, he competed in the FIS Alpine World Ski Championships in Vail, Colorado. He was asked to compete in the 2014 Winter Olympics in Sochi, Russia, however, an injury prohibited him from competing; he was replaced by Constantinos Papamichael. Lefkaritis won the silver medal representing Cyprus in the 2017 Games of the Small States of Europe.