Dr. Ghaleb Mahmassani first joined the Beirut Bar Association in 1999, he is an attorney and legal counsel since 1962 and an international arbitrator since 1976, and he is also a member of the National Committee of the Permanent Court of Arbitration at The Hague (The Netherlands).

Dr. Mahmassani served as a member of the International Court of Arbitration at the International Chamber of Commerce (ICC) in Paris from 2000 to 2005.

Widely published at academic and professional levels, he received law degrees from Saint Joseph University-Beirut, a degree in political science from the American University of Beirut, and a Ph.D. in law from the University of Lyon.