Howard B. Levine is a member of APSA, PINE, the Contemporary Freudian Society and Pulsion; he is on the faculty of NYU Post-Doc's Contemporary Freudian Track, on the editorial boards of the International Journal of Psychoanalysis and Psychoanalytic Inquiry, editor-in-chief of the Routledge Wilfred Bion Studies Book Series and in private practice in Brookline, Massachusetts, USA.

Jani Santamaría Linares is a member of APSA, APM, FEPAL, IPA and the International Advisory Committee of the Routledge Bion Studies Book Series, director of A-Santamaría Psychoanalysis Mexico A.C., a training and supervising analyst for children and adolescents, a member of the International Committee of Spanish Language Psychoanalysts and in private practice in Mexico City.