Previously, Sheikh Saud was the Commander of the Umm al-Quwain National Guard with the rank of colonel. In 1979 he headed the Umm al-Quwain Royal Court (Al Diwan Al Amir). Then on the 22 June 1982 his father Sheikh Rashid III bin Ahmad Al Mu'alla designated him to be the Crown Prince of Umm al-Quwain. He assisted his father in managing the emirate’s affairs, oversaw many investment projects and established numerous government entities and local enterprises.
Born on 1 October 1952, Sheikh Saud received his elementary and primary education in Umm al-Quwain before attending high school in Lebanon. He graduated with a degree in economics from Cairo University, Egypt in 1974.
He was appointed to the United Arab Emirates foreign ministry in 1973, and seconded at the Umm al-Quwain Amiri court. He was appointed Commander of the Umm al-Quwain Amiri guard in 1977. In 1979, he was appointed chief of the Umm al-Quwain Amiri court (Diwan) and became crown prince in 1982.