Hassoun began his career at hometown club Chabab Ghazieh aged 13,[2] joining Ansar on 5 May 1997.
[11] Both Hassoun and Taha submitted their resignation on 11 September 2016, following Ansar's 5–2 defeat to Salam Zgharta in the first round of the 2016–17 season.
[13] He became coach of Second Division side Shabab Arabi on 3 February 2018,[14] resigning only one month later on 5 March citing administrative reasons.
[15] Hassoun was appointed head coach of Shabab Bourj in the Second Division ahead of the 2018–19 season.
[20] On 24 June 2022, Hassoun became head coach of Lebanese Premier League side Tadamon Sour.