Prince Saad was born in Qasr Al Hukm, Riyadh,[1] in 1915 as the seventh son of King Abdulaziz.

The injury forced his uncle Prince Muhammed bin Abdul Rahman, who was in the battle as well to carry him outside where he transferred to Taif and stayed one month for treatment.

After the Battle of Jizan and the unification of the Kingdom, he was appointed by his father the governor of the province of Khamis Mushait, and was at the time at the age of eighteen.

In 1935, Sa'ad worked to protect Khamis Mushayt from attacks of Mutawakkilite Kingdom of Yemen, where at the time Saudi–Yemeni War is held.

The province under Sa'ad made integrated urban renaissance, where wells were drilled and excavated, building markets and trading.

As a ruler of Asir, Saad developed the air defense with the help of the Defence Minister Prince Mansour bin Abdulaziz, who sent civilian and military aircraft in the 1940s and 1950s.