McIntire entered the Navy Medical Corps in 1917. He served aboard the cruiser New Orleans during World War I.
CL-22. The First U. S. Navy ship commissioned the USS New Orleans, CL-22, was a 3769 ton protected cruiser. The ship supported naval operations off the coast of Cuba in the Spanish-American War and convoy escort duty in World War I. New Orleans served two tours of Asiatic service and one in the eastern Pacific up to 1917, when World War I requirements called her to the Atlantic. She escorted convoys until January 1918, and then sailed for further duty in Asiatic waters, where she spent the rest of her active career. Designated PG-34 in 1920 and CL-22 in 1921, New Orleans was decommissioned in November 1922 and sold for scrapping in February 1930.
