Co-President

Co-President
Michael Murray, LMHC, M.Ed

Michael Murray, LMHC, M.Ed is a therapist and educational consultant. He has worked in K-12 education for twenty-four years, in programs for students with significant social, emotional, and behavioral challenges. Much of his group experience is in leading groups with children and adolescents. Michael sees patients in his office in Cambridge, and consults with school districts about inclusion programming. 

Treasurer

Louis Arcudi, LMHC, MBA

Louis Arcudi, LMHC, MBA, is an individual psychotherapist, group psychotherapist, and clinical supervisor at The Brookline Center and in private practice. His work is grounded in psychodynamic, trauma-informed, and identity-affirming care, with a particular interest in group process.

Louis came to NSGP when a colleague invited him to co-lead the Special Interest Group Embracing Contrast: An Exploration of Relational Connection Across Differences at the 2025 Annual Conference. The group explored how difference can become a source of connection rather than division. At The Brookline Center, he co-leads an Observation Group, an experiential group psychotherapy training that helps clinicians deepen their understanding of group process, relational dynamics, and clinical leadership through live observation and consultation. He also provides supervision to licensed clinicians, pre-licensed clinicians, and trainees.

Louis brings clinical leadership experience and an MBA in Health Care Administration to support NSGP's continued growth as a community for group therapists and allied professionals.

Secretary

Simon Sandvik, LMHC

Samantha Dorian, MDiv, MA

Samantha Dorian works in Providence, RI & Boston, MA. She is a candidate in the Clinical Doctoral Program in Psychoanalysis at the Boston Graduate School of Psychoanalysis (BGSP) in Brookline, MA. She is a visual artist, a meditation teacher, and currently building her private practice while developing new groups as well as starting her foundation: SculptYourMind™ She sees adults, couples and runs workshops and facilitates groups. Samantha is experienced in conflict resolution, inter-religious dialogue and group dynamics; training she received at Harvard. As a meditation instructor as well as a group leader, she often works with people suffering from extreme states of psychosis. However, presently, she teaches meditation for the ILD Collaborative, for those suffering from lung disease. Samantha’s involvement with NSGP began when she attended her conference in 2019 after working with a group leader at the VA in Middletown, RI who had trained at NSGP. Samantha knows the benefits of group work are profound and long lasting. She firmly believes that groups provide the best possible experience to allow the shifts necessary for healing to occur when thoughts and feelings are put to language. The magic of words can transform the inner landscape.

Corey J Flanders, LMHC, MA, CGP

Corey Flanders is a mental health counselor and certified group psychotherapist with a private practice in Providence, RI. He began attending the NSGP annual conference in 2015 and absolutely loved the experiential components of group training. He went on to complete the Principles Course and the Experience Group at NSGP. He looks to expand his involvement with the NSGP community while building interest in group psychotherapy generally in Rhode Island. He is currently training at the Center for Group Studies in New York and leads a vibrant training group for therapists as well as a men’s group and a mixed gender process group.

Gabriela Pérez-Gil del Valle, LMHC, CGP, PsyD

Gabriela Pérez-Gil del Valle brings extensive experience in integrating psychotherapy with social and community-based work. For over twenty-five years, she has collaborated with Pina Palmera A.C., a community organization in Oaxaca, Mexico, serving primarily indigenous populations with disabilities.

Trained in Mexico in Humanistic, Gestalt, and Existential psychotherapies, Dr. Perez-Gil holds a specialization in group therapy. Her areas of expertise include addiction prevention, group desensitization, and group skills development.

She has taught extensively at conferences, universities, and throughout the Mexican school system. Clinically, she has worked as an in-home therapist for Latino children in crisis and their families, served for over a decade at the South End Community Health Center, and collaborated with Project Place to support incarcerated women. In that role, she also developed and led a group consultation model for staff at all levels, which ran for over six years.

Dr. Perez-Gil currently maintains a private practice in Brookline, Massachusetts, and earned her doctorate from the Boston Graduate School of Psychoanalysis.

E Merten, LICSW

E (they/she) is a clinical social worker working as an individual psychotherapist, group psychotherapist, clinical supervisor, and group therapy program manager at Advance Psychotherapy Practice in Northampton, MA. Alongside their clinical practice, they also teach at Springfield College's MSW program and enjoy writing and publishing on topics such as tabletop-roleplaying games, neurodiversity, and sexuality in group process.

With a passion for group therapy spanning over 15 years, you can imagine E's delight to stumble upon NSGP just before the Annual Conference in 2024. Since then, they have been eagerly putting their energy and enthusiasm into getting involved, particularly in bringing more NSGP programming and community to their area in Western Massachusetts. They are very grateful for the opportunity to serve on NSGP's Board of Directors and continue to contribute to, learn from, and grow with this vibrant community of group therapists.