 On September 14, 1929, he was promoted to the rank of Major.Rodríguez Vargas was a member of the District of Columbia Dental Society, the International Association of Dental Research and a fellow of the American College of Dentists.In 1925, he was assigned to the General Dispensary, U.S. Army in Boston, Massachusetts until August 1926, when he was reassigned to Holabird Quartermaster Depot, Baltimore, Maryland, which would turn out to be his last assignment.