Boon made his debut in the national team in 2008. In 2009 he finished fifth with this team at the European Championship in Amstelveen and in 2011 they finished fourth at the European Championship in Mönchengladbach. In 2011, he also won the Champions Challenge. With his club Racing Brussels, he became Belgian field hockey champion for five consecutive years (2009-2013). At the 2012 Summer Olympics, he competed for the national team in the men's tournament that came fifth. Boon became European silver medalist with Belgium at the 2013 European Championship on home ground in Boom. In spite of his opening goal against Germany, Belgium lost the final by 1-3.