Constantinos is the President of the Cyprus Rugby Federation, a position he has held since 2019. Constantinos has been instrumental in promoting rugby in Cyprus and strengthening international relations. For instance, on July 8, 2021, he met with the Secretary-General of the United Arab Emirates Rugby Federation to discuss a partnership between the two organizations. In addition to his administrative duties, Constantinides is an active player and serves as the captain of the Limassol Crusaders Rugby Football Club. He has been a key figure in the club’s leadership, holding the captaincy for multiple seasons.