He competed in the 200 m individual medley event at the 2012 Summer Olympics and was eliminated after the qualifying heats.

[1] At the 2016 Summer Olympics, he competed in the men's 200 m individual medley event.

[2] He was a member of the men's 4 x 100 medley relay team which finished 15th in the heats and did not advance to the final.

Andreas Vazaios is a member of the London Roar team, competing in Season 2 of the International Swimming League (ISL).

The ISL is an annual professional swimming league featuring a team-based competition format with fast-paced race sessions.