He previously played for the South Sydney Rabbitohs in the NRL, and represented Lebanon in the 2017 Rugby League World Cup.

[5][6] After playing for the Balmain Tigers in the S. G. Ball Cup for two years, Doueihi signed a two-year contract with the South Sydney Rabbitohs in October 2016.

Doueihi made 15 appearances for Souths before suffering a season ending anterior cruciate ligament (ACL) knee injury in their 30–20 victory over Melbourne.

[23] In round 6 of the 2023 NRL season, Doueihi was taken from the field during the second half of Wests Tigers 28-22 loss against Parramatta with a knee injury.

Doueihi had previously been involved in a gay rights controversy when he supported a Sydney Catholic girls school banning students bringing female dates to the Year 12 formal.

[26][27] Doueihi made his long awaited return to the Wests Tigers team in round 16 of the 2024 NRL season, scoring a try in the clubs 48-24 victory over Canberra.