Hamadeh worked as a journalist, political commentator, and university professor of philosophy.[1] He was one of the Lebanese partisans of Palestinian Fatah movement from the early 1970s to the late 1980s. In 1984, he fled with his family to Paris.[1] He stayed in Paris for ten years. He received a PhD. from Sorbonne University and also, worked there as a journalist.[1]
Hamadeh was Minister of Labor in the 2005 government from April 2005 to 11 November 2006 when he and the other four Shi’ite ministers in the Siniora government resigned.[2] He succeeded Assem Qanso as Minister of Labor, and was succeeded by Muhammad Fneish, another Hezbollah member.