Costas Rigas started as a basketball player with 1st Greek division club. Later he became a coach and a referee in the same time.

In 1974 Mr. Rigas decided to follow his referee career only.

1977 – Mr. Rigas became an International referee.

1992 – He finished his ref career at Barcelona Olympics.

2012– Olympic Game's Commisioner

Costas Rigas officiated big finals and he is very happy and proud to choose the refereeing road which is not easy but as he said: “You are dealing only with yourself. Not with the presidents of the clubs, not with players, fans, media could fire you as it happens with coach job.”

Among the 23 big finals officiated we have to mention the Los Angeles Olympic Games Men’s Final in 1984 and Barcelona Olympics Women’s Final in 1992.

He also officiated World Championships Final in 1996. European Championships Finals in 1985 and 1991. Club's Champions finals “Korac Cup” four times and Intercontinental Final, America's Final twice and the first McDonald final in Milwaukee and other Zones Championships Finals.

He decided to finish 2 years earlier than the limit says, becoming the first General Director of the Professional League in Greece while at the same time he was FIBA commissioner and National Instructor.

With the unanimous decision of the clubs Costas Rigas became Director of the Euroleague referees on 2000 when the new organization was established.