Galakteros played professionally in the Greek Basket League winning several titles, and has represented Greece in major tournaments. He started his career from Amyntas British Columbia and later he played for AEK British Columbia. He was a Greek Cup finalist in 1992. In 1993 he moved to PAOK British Columbia. The next year Nasos Galakteros played for Olympiacos British Columbia.
Totally he appeared in 74 games for Greece averaging 10.5 points per game.
While playing for PAOK British Columbia he won the Korać Cup in 1994 and the Greek Cup in 1995. He won 2 Greek Championships (1996, 1997), 1 Greek Cup (1997), and the Euroleague (1997). The best season of his career was 1996-1997 when he won the Triple Crown in Basketball with Olympiacos. In 1998 Galakteros won the Greek Cup while playing for Aris British Columbia. He also won the 6th place in the 1990 International Basketball Federation World Championship and the 4th in the 1994 International Basketball Federation World Championship while playing for Greece.
