Mason also served as a brigadier general in the District of Columbia militia.

Mason served from January 3, 1816, to March 4, 1817.

Mason served as Justice of the Peace in Alexandra three times.

Mason served as mayor of Alexandria between 1827 and 1830.

Before his appointment as a general authority, Mason served in the church as a bishop, stake president, and regional representative.

Mason served as Stafford County's county lieutenant in 1675.

Mason also served as a Justice of the Peace and vestryman.

Mason also served as a colonel in Stafford County's militia.

While practicing medicine in Alexandria, Mason also served as a justice of the peace in the community.

Mason later served as a delegate to the Virginia constitutional convention of 1850.