The Ligue 1 side announced the signing on their official website on Tuesday and the north African player will begin training with his team-mates as early as Wednesday before being presented to the press on Thursday.
Dhaouadi has arrived on a free transfer, after his contract with Club Africain expired, and will join Carthage Eagles colleague Sabeur Khelifa in the same side. A third Tunisian, right-back Iheb Mbarki, is also expected to sign for Evian in coming days.
Dhaouadi’s scintilliating performances at the 2011 African Nations Championship (CHAN) put him on the radar for many European teams, including Auxerre, Hannover, and Hamburg.
The 24-year-old helped Tunisia lift the title in Sudan, and was the tournament’s joint top scorer, while being designated as Most Valuable Player of the competition.
His final months at Club Africain were difficult, though, as the Beb Jdid outfit put pressure on him to sign an extension so that they would benefit financially from his move to Europe.
The Kairouan native also had a number of disciplinary issues with former manager Abdelhak Ben Chikha that led to him being dropped from Tunisia's recent 2014 World Cup qualifiers by Sami Trabelsi.