Coming through the youth system, Ghaddar began his senior career at Nejmeh in 2000. He stayed nine years at the club, winning multiple domestic and individual titles. In 2009, Ghaddar moved abroad, joining Al-Shabab in Bahrain, then Egyptian side Al Ahly in 2010, helping them win the league title. Following stints in Syria at Tishreen in 2010 and Al-Jaish in 2011, Ghaddar moved to Malaysia at Kelantan and FELDA United. He then returned to the Middle East, where he played for Al-Faisaly and Naft Al-Wasat between 2014 and 2017. Ghaddar returned to Kelantan, before moving to Johor Darul Ta'zim, winning the league as the top scorer. Following a second return to Kelantan and a stint at Johor Darul Ta'zim II, he returned to Nejmeh in Lebanon in 2020, where he retired two years later.
