Omar Faiek Shennib Avenue in Derna was named after him posthumously.

Shennib served as President of the Cyrenaican delegation to the United Nations in the post-war period and was instrumental in the creation of a unified Libyan state in the years following World War II.

[3] Together with Idris, Shennib was part of the 1941 delegation to the UN which put forth the case for the unification of the three traditional free-standing regions, Cyrenaica, Tripolitania, and Fezzan into the nation state of Libya.

Following independence on 24 December 1951, he was appointed Chief of the Royal Diwans[4] Shennib is credited for the design of the Flag of Libya: this flag represented Libya from its independence until 1951 to 1969, and was re-adopted by the rebel movement during the 2011 Libyan Civil War.

According to the memoirs of Adrian Pelt, UN commissioner for Libya (1949 to 1951), “during deliberations of the Libyan National Constitutional Convention, a paper drawing of a proposed national flag was presented to the convention by Omar Faiek Shennib (distinguished member of the delegation from Cyrenaica).