At the 2008, 2012 and 2016 Summer Olympics, he competed for the national team in the men's tournament. At the 2016 Olympics, he was part of the Belgian men's team that won the silver medal. Charlier also won silver with Belgium at the 2013 EuroHockey Championship on home ground in Boom and at the 2017 EuroHockey Championships in Amstelveen. In 2019, he finally won a gold medal at the European championships. On 25 May 2021, he was selected in the squad for the 2021 EuroHockey Championship.