Romy made his debut with Switzerland men's team in the 2004–05 season. He earned a spot on the team for the 2005 IIHF World Championship in Austria as Switzerland fell to Sweden in the quarter finals. He played a total of 25 games with the men's team this season, failing to score a single point. Romy was also selected to represent Switzerland for the 2006, 2009, 2010, 2012, 2014 and 2015 editions. He was also selected to represent Switzerland at the 2014 Winter Olympics where he tallied 1 assist in 4 games as Switzerland lost to Latvia in the qualifying game for the quarter finals.