On March 15, 1929, Simms and Charles C. Catron were appointed by Governor Richard C. Dillon to two newly-created seats on the state supreme court.[4]
He partnered with James R. Modrall.[5] The University of New Mexico has a lectureship named for him.[6]
Simms married Anne Clapton Schluter. His son was campaigning for the Democratic Party nomination when Simms died. Another of his sons was Dr. Albert G. Simms. He[who?] was pinned against a tree and both his legs broken in an auto accident.[citation needed]