Highlights of his earlier career include two medals in world track championships, in Points Races (Los Angeles 2005) and Scratch (Bordeaux 2006).

[3] In 2008, Tamouridis was given a one-year ban from cycling, following a positive drugs test for oxandrolone, an androgen and anabolic steroid (AAS).

[4] He won the bronze medal for the time trial at the XVI Mediterranean Games held in Pescara, Italy,[5] and competed with SP Tableware between 2009 and 2012.

[12] In June 2013 Tamouridis won both the Greek National Road Race Championships and Greek National Time Trial Championships titles, dedicating the latter to Rufino Murguía, Euskaltel–Euskadi's team masseur, who was killed when the team's bus was involved in a crash.

[13] Tamouridis rejoined SP Tableware in 2014, after his previous team – Euskaltel–Euskadi – folded at the end of the 2013 season.