[3] Early in his career, Menninger served as a teaching and research fellow at Harvard Medical School.

[2] From 1953 to 1955, he served as a psychiatrist with the United States Army, including a tour of duty in Salzburg, Austria.

[7] During his time as president, the Menninger Clinic was recognized as "one of the major psychiatric treatment and teaching facilities in the world.

"[8] Also under his leadership, the foundation successfully raised funds on a national basis to build a new $23-million hospital (completed in 1982) and underwent major expansion, extending its work to include group psychotherapy, family therapy, biofeedback, a halfway house, short-term psychotherapy, and an alcohol and drug rehabilitation program.

[9] Menninger and John Nemiah co-edited the book American Psychiatry after World War II, 1944–1994.