Career
Since his retirement, Niniadis has been employed by his former club as a chief scout and an assistant manager, a position he holds today. Football He was one of the dominant players in one of Football Club gold eras (1997–2003) and he helped his team to reach 7 Greek superleague championships successively and 1 Greek cup as well. He also played for Pontioi Veroia, Ethnikos Piraeus F.C. and Kerkira Football Club. Niniadis earned 17 caps for the Greek national team scoring two goals.
Manager In the 2006-2007and 2009-2010 season he was the assistant coach of Football Club manager Takis Lemonis and Bozidar Bandovic.