Smyrniotis is the co-founder of the Sigma FC soccer academy based in Mississauga.

[4] On October 1, 2018, Smyrniotis was announced as the first head coach and technical director of Canadian Premier League club Forge FC.

[13] Forge repeated as league champions after a 2–0 win in the Championship final against HFX Wanderers.

[16] In 2024, Smyrniotis was nominated for Canadian Premier League Coach of the Year for a sixth consecutive season,[17] ultimately winning the award for the first time.

[20] He received a Specialized Honours Bachelor of Arts degree in Kinesiology & Health Science from York University and a Master of Science degree in Sports Management from the University of Louisville.