Sounas started his career in youth teams of Aris. In 2012, new head coach Makis Katsavakis promoted him to the first team, and he made his debut on 14 August 2012, in a friendly game against Veria scoring a goal.[2] From August 2012 he is also member of Greece's U19 national team after he was chosen from Kostas Tsanas, head of the U19 team.[3] His professional debut was made on 27 August 2012 against Panionios and his first goal against Atromitos in Kleanthis Vikelidis in a 1–1 draw. On 23 September 2015, he dissolved his contract with the club.
On 17 July 2016, Sounas has signed a contract with Lega Pro club Monopoli.[5] He left the club having 93 appearances (4 goals, 17 assists) in all competitions.
Reggina
On 2 July 2019, Sounas has signed a contract with Lega Pro club Reggina until the summer of 2021 with an undisclosed fee.[6]
Perugia
On 28 September 2020, he joined Serie C club Perugia.[7] He lost his position in the squad after Perugia was promoted to Serie B for the 2021–22 season.
Catanzaro
On 13 January 2022, he signed a 2.5-year contract with Catanzaro, returning to Serie C.[8]