[1] During his college career he also played with USL PDL sides New Hampshire Phantoms and Ventura County Fusion.

His play with Tindastóll drew the attention of newly promoted top flight club Fjölnir Reykjavík.

Tsonis signed with New York Red Bulls II for the 2015 season and made his debut as a starter for the side in its first ever match on March 28, 2015, in a 0–0 draw with Rochester Rhinos.

[4] On June 30, 2015, Tsonis scored the loan goal for New York Red Bulls II in a 1–0 victory over Wilmington Hammerheads.

[5] On July 25, 2015, Tsonis scored twice for New York, helping Red Bull II to a 4–2 victory over Richmond Kickers.