earned his medical degree in 1910 from the University of Zurich, where he assisted Carl Gustav Jung at the Burghölzli Psychiatric Clinic with word association tests.
For a short time he practised psychiatry in Schaffhausen and Bern, and in 1912 he taught classes at the university clinic in Kraków.
In 1932 copies of his lectures were published (translated in 1955 as a book titled "Principles of Psychoanalysis, Their Application to the Neuroses");[1] and in the preface of the 1932 publication, an impressed Sigmund Freud wrote that it:"contains the most complete and conscientious presentation of a psycho-analytic theory of the neurotic processes which we at present possess".Nunberg was an early advocate (1918) of required "training analysis" sessions for psychoanalysts in training.
[4] Jacques Lacan however considered that Nunberg revealed something of his own grandiosity in his meditations upon the relations between the life and the death forces.
[5] Nunberg's articles on ‘The Will to Recovery’ (1926) and ‘On the Theory of Therapeutic Results of Psychoanalysis’ (1937) reveal his interest in the curative aspects of analysis.