He graduated with a Bachelor of Science in Civil Engineering from the Egyptian University in Alexandria in 1943.
He returned to Libya in 1950 to help with the reconstruction of the country following the Second World War and subsequent Allied occupation of Libya. He was appointed Minister of Public Works in Libya"s first government in 1953. Appointed Prime Minister in 1954 until 1957.
Ben Halim was the Private Councilor to the King of Libya from 1957 to 1958.
He was the Libyan Ambassador to France from 1958 to 1960. He left Public service in 1960 to start his own construction business.
He was away during the 1969 coup, and was unable to return to Libya. He briefly settled in Beirut, Lebanon in 1970 to pursue new business ventures.
He was a victim of a failed kidnapping attempt by mercenaries hired by Gaddhafi.
He then moved to London in 1973. In 1980 he was appointed Personal Councilor to then Crown Prince Fahd bin Abdul Aziz of Saudi Arabia. Ben Halim is the last surviving of the Kingdom of Libya"s premiers, and the only one of them who survived the fall of Muammar Gaddafi in 2011.