Freudenberger (1926–1999) was a German-born American psychologist.
Though Freudenberger had many jobs during his life, including practitioner, editor, theoretician, and author, his most significant contribution is in the understanding and treatment of stress, chronic fatigue and substance abuse.Freudenberger was one of the first to describe the symptoms of exhaustion professionally and perform a comprehensive study of "burnout".
During 1980, he published a book dealing with chronic fatigue, which became a standard reference for the phenomenon.
His most prestigious award was the American Psychological Foundation Gold Medal Award for Life Achievement in the Practice of Psychology during 1999.