In 1965, he moved to the Lissan Al Hal newspaper and started publishing his first political cartoons editorially, remaining with the paper until 1966.
From 1971 to 1973, he was art director for Al-Usbu' Alarabi while also publishing cartoons in the English-language Daily Star newspaper and Monday Morning magazine.
In 1967, Kahil, along with Farid Salman and Roro Breidi, began producing the newsreel series Actualitees Libanaises exclusively for cinemas in Hamra, Beirut.
Mahmoud Kahil died at the age of 66 from complications during a heart surgery in London on 11 February 2003.
On 29 April 2015 an initiative by Mutazz and Rada Sawwaf[1] was launched at the American University of Beirut to create a new comics award for all talent in the Arab world in the field of cartoons, illustrations and graphic design, to be named "The Mahmoud Kahil Award".