[3][5] Initially specializing in urology, Allen entered hospital administration after earning his PhD.

"[2][5] However, he refused to give a list of texts taught at UW to the House Un-American Activities Committee and allowed leftist writer Malcolm Cowley to speak at the university.

[4] In addition to his work for university hospitals, Allen dedicated time to public service.

[4] Allen briefly served as chair of the newly created Armed Forces Medical Policy Council in 1949.

[5] During his tenure, the UCLA Medical Center was built and the Schools of Medicine, Dentistry, and Nursing were developed, as well as the Neuropsychiatric Institute.

[3] He resigned after a three-year investigation led to the revelation of corruption between football players and the Pacific Coast Conference.