Ph.D. is Training and Supervising Analyst at the William Alanson White Institute in New York City; Clinical Consultant and Adjunct Clinical Professor of Psychology at the NYU Postdoctoral Program in Psychoanalysis and Psychotherapy; and faculty at the New York Psychoanalytic Society and Institute. He is the Founder and Editor of a book series at Routledge, "Psychoanalysis in a New Key," which has 70 books in print and another 20 in various stages of completion. He is the former Editor-in-Chief of the journal Contemporary Psychoanalysis. He has published many articles and book chapters, and four books: Unformulated Experience: From Dissociation to Imagination in Psychoanalysis (1997); Partners in Thought: Working with Unformulated Experience, Dissociation, and Enactment (2010); Relational Freedom: Emergent Properties of the Interpersonal Field (2015); and The Infinity of the Unsaid: Unformulated Experience, Language, and the Nonverbal (2019). In the near future a new book will appear: Fieldwork: Transaction and Transformation. He is the co-editor of four books: Pioneers of Interpersonal Psychoanalysis (1995), The Handbook of Interpersonal Psychoanalysis (1995), The Interpersonal Perspective in Psychoanalysis, 1960s-1990s: Rethinking Transference and Countertransference (2017), and The Interpersonal Perspective in Psychoanalysis, 1980s-2010s: Evolving Interest in the Analyst's Subjectivity (2017). He serves as Associate Editor of Psychoanalytic Dialogues and The Journal of the American Psychoanalytic Association, and is a member of the editorial boards of Psychoanalytic Inquiry, Psychoanalytic Psychology, and The Psychoanalytic Quarterly. He is in private practice in New York City, where he sees adolescents and adults in psychoanalysis and psychotherapy, does clinical consultation, and leads private study groups.