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Guy Diamond

Contact Information

  • 610.888.6966
  • 267.359.5576 F
  • Health Sciences Building, Room 11W16

Guy S. Diamond


Associate Professor

Counseling and Family Therapy Department

Guy Diamond, PhD, is an associate professor in the Department of Counseling and Family Therapy in the College of Nursing and Health Professions at Drexel University and the director of the Center for Family Intervention Science (CFIS). He is a family intervention clinical trials researcher with a focus on family therapy for youth suicide. Since its inception, CFIS has been fully funded with up to 22 staff and has brought in over $30,000,000 of funding from NIMH, SAMSHA, CDC, CSAT and several private foundations. CFIS is dedicated to the development, testing and dissemination of family-based treatments for diverse samples of depressed and suicidal youth and their parents. In this capacity, he has overseen the design, implementation and dissemination of over 15 clinical trial studies. Diamond’s primary work has been in the area of youth suicide prevention and treatment research. On the prevention side, he has created a program focused on training, screening and triage to be implemented in non-behavioral health settings. On the treatment side, Diamond is the primary developer of attachment-based family therapy, specially developed and tested for treating youth depression and suicide. Most of his research career has focused on working with low-income disadvantages youth and families.

Professional Society

American Psychological Association, Division 43, vice president for Research
Society for Psychotherapy Research
American Association of Marital and Family Therapy
American Association of Suicidology

Selected Publications

Diamond, G., Diamond, G.M., & Levy, S. (2021). Attachment-based family therapy: Theory, clinical model, outcomes, and process research. Journal of Affective Disorders, 294(1), 286-295.

Ibrahim, M., Levy, S., Gallop, B., Krauthamer Ewing, S., Hogue, A., Chou, J., & Diamond, G. (2021). Therapist Adherence to Two Treatments for Adolescent Suicide Risk: Association to Outcomes and Role of Therapeutic Alliance. Family Process.

Levy, S., Mason, S., Russon, J., & Diamond, G. (2021). Attachment‐based family therapy in the age of telehealth and COVID‐19. Journal of Marital and Family Therapy, 47(2), 440-454.

Diamond, G. D., Kobak, R., Krauthamer Ewing, S., Levy, S. A., Herres, J. L., Russon, J. M., Gallop, R. J. (in press). Attachment-Based Family and Non-Directive Supportive Treatments for Suicidal Youth: A Comparative Efficacy Trial. Journal of the American Academy of Child & Adolescent Psychiatry.

Diamond, G., Russon, J., & Levy, S. (2016). Attachment-based family therapy: A review of the empirical support. Family Process 19. | DOI: 10.1111/famp.12241

Grant participation:

  • SAMHSA Garrett Lee Smith youth Suicide Prevention
  • SAMHSA NSSP Garrett Lee Smith Adult Suicide Prevention
  • SAMHSA COVID Emergency funds to support hospital aftercare for adults
  • NIH Family Based Treatment for Youth exposed to community Violence

Editorial review board membership:

  • 2013 – current Family Process
  • 2020 Couple and Family Psychology: Research and Practice

Research Interests

Family therapy, treatment and prevention of youth suicide, web-based screening.

Postdoctoral Fellowship, Clinical Psychology, 1993
University of Pennsylvania School of Medicine
Philadelphia, PA

Predoctoral Internship, Family Therapy, 1991
Philadelphia Child Guidance Center
Philadelphia, PA

PhD, Clinical Psychology, 1992
California School of Professional Psychology
San Francisco, CA

MA, Psychology, 1986
New College of California
San Francisco, CA

BA, Liberal Arts, 1981
The Evergreen State College
Olympia, WA