Nicolas Constantin-Bicari played a pivotal role in Canadian water polo history. He was a member of the Canadian junior national team that clinched gold at the 2010 Junior Pan American Championships. This victory marked a significant milestone for Canadian water polo.

Before his junior success, Constantin-Bicari joined the senior national team in 2009. His contributions were instrumental in leading the men's team to an eighth-place finish at the 2009 FINA World Championships, their best-ever performance at the international competition.