Dunlap served as the 14th Chief of the Army Nurse Corps (ANC) from 1 September 1971 to 31 August 1975. She graduated from Santa Rosa Hospital School of Nursing in 1942, she received her Bachelor of Science cum laude from Incarnate Word College in San Antonio, Texas in 1954. She received her Master of Health Administration from Baylor University in Waco, Texas in 1960.[3] Her main focus during her time as the ANC Corps Chief was professionalizing the education of military nurses by creating a standard Bachelor of Science in nursing.
On 23 October 1973 Dunlap became the first woman in the history of the United States Army to serve as president of a Department of the Army Officer promotion board.[4]