Log in

Northeastern Society for Group Psychotherapy Foundation (NSGPF)

Our Team

Board of Directors

Barbara Keezell, LICSW, CGP, FAGPA, NSGPF President

Barbara Keezell, LICSW, CGP, FAGPA, NSGPF President

Barbara Keezell is a therapist in private practice who works with people in individual, couples, and group therapy. She has been an NSGPF Board member since 2006. She is a past President of the Northeastern Society for Group Psychotherapy, where she has also served as Conference Co-Chair and Newsletter Co-editor. She has served on the Board of the American Group Psychotherapy Association and is currently Co-Chair of their Online Institute Committee. She has led many Experience Groups to help train group therapists as she is passionate about the value of groups in healing. She loves walking, smelling the flowers, and speaking French. 

Laura Crain,

NSGPF Vice-President

Bio coming soon

Jeff Brand, Psy.D.,

NSGPF Treasurer 

Jeff Brand is a staff psychologist at The Brookline Center for Community Mental Health and has a private practice in Jamaica Plain, MA.  At the Brookline Center, he directs the adult group therapy program, including supervision, teaching, and program development. In his private practice (, he works with adults in individual and couples therapy, as well as running a therapy group.  He completed his Psy.D. at Rutgers University and did his internship at the Cambridge Health Alliance.  He has written about trauma and published articles about concepts from group therapy.   He was previously on the board of directors for the Northeastern Society for Group Psychotherapy.  He enjoys being outside. 

Caleb Englander, LICSW,

NSGPF Secretary

Caleb Englander joined the NSGPF Board in the role of Secretary in November 2021. Caleb has been leading therapy groups for many years in a wide range of settings and capacities: wilderness therapy, community mental health center, schools, transitional living programs, and currently as a clinical social worker with a private psychotherapy practice in Cambridge MA. He is an active member of the Northeastern Society of Group Psychotherapy (NSGP) and the Massachusetts Institute for Psychoanalysis (MIP). 

Sara Emerson, LICSW, CGP

Sara Emerson, LICSW, CGP

Sara Emerson is in private practice in Cambridge working with individuals and groups. Currently a member of the American Group Psychotherapy Association, Northeastern Society for Group Psychotherapy, and the Massachusetts Institute for Psychoanalysis, she has served as President (NSGP) and board member (AGPA and MIP). She is on the faculty at MIP, and regularly presents at NSGP and AGPA conferences. As a member of the board of NSGPF she has also taken the role of chair of the Rice Memorial Fund. In this role she is working to collaborate with other members of the NSGPF board and NSGP to design outreach and support for clinicians working with clients who have experienced domestic violence.

Steffen Fuller, PhD, CGP

Steffen Fuller, PhD, CGP, NSGPF

Steffen Fuller is a neuropsychologist and therapist in private practice where he focuses on neuropsychological and personality assessment and on individual, couples, and group psychotherapy. He is a past President of the Northeastern Society for Group Psychotherapy board and has frequently presented at area conferences on subjects related to group therapy and group process in organizations.

Aliza Phillips-Stoll 

Bio coming soon


Laura Richardson

Bio coming soon 

Roger Rodriguez, B.S. Entrepreneurial Studies

Rogerio Rodriguez brings with him, a unique blend of global experience, local business expertise and a lifelong commitment to community mental health.  An alumnus of Babson College, in Wellesley, MA, he works as a real estate agent dedicated to enhancing his client's real estate prosperity. He enjoys traveling, gardening and walks with his long time partner and their golden retriever Chewbacca.

Joseph Shay, PhD, CGP, LFAGPA

Joseph Shay, PhD, CGP, AGPA-LF

Joe Shay is a psychologist in private practice and works with individuals, couples, families, and groups. He also teaches and supervises for a number of training programs as well as having served on the boards of various professional organizations, and on the editorial board of the International Journal of Group Psychotherapy. Joe especially enjoys teaching and mentoring younger professionals and has twice been awarded the Psychotherapy Supervision Award by the psychiatry residents in the Massachusetts General Hospital/McLean Hospital training program.

Adam J. Silk, MD, CGP

Adam J. Silk, MD, CGP

Adam Silk is a psychiatrist in private practice, treating individuals and groups. He is also the Executive Director of RELATE, a nonprofit organization that provides training for K–12 educators in group leadership and group dynamics. Adam has been a member of the Northeastern Society for Group Psychotherapy for many years, and has been on the NSGPF Board since 2018. He is on the faculty of Harvard Medical School at Massachusetts General Hospital, where he teaches in the Psychiatry residency program. Adam is also a musician who has performed at many venues in the Boston area.

Ex Officio Board Members

Guy Croteau, LICSW, CGP

Guy Croteau, LICSW, CGP

Guy Croteau is currently President of the Northeastern Society for Group Psychotherapy. He has served on the NSGP board for four years as Treasurer and has chaired and co-chaired the Conference Committee for 3 years. He is passionate about group work and helping NSGP bring the power of groups to more people and professions. Guy maintains a robust private practice in Boston and specializes in Trauma/EMDR work as well as working with the LGBTQA+ community.

Joel Krieg

Bio coming soon

Sasha Watkins, Ed.D., LMHC

Alexandra (Sasha) Watkins, currently Co-President Elect of the Northeastern Society for Group Psychotherapy, serving as NSGP Diversity, Equity, and Inclusion (DEI) Co-Chair and Board Officer, has over 20 years of experience in mental health and related fields in the US and internationally. As MBA Support Services Associate Director at Harvard Business School, Sasha oversees DEI programming for students. She also teaches group dynamics from the identity-based perspective at Lesley University and runs a program for neurodiverse adults for the Massachusetts Rehabilitation Commission. Sasha’s research focuses on identity, culture, and leadership, and she has facilitated long and short-term therapy and other types of groups across various settings.

Support Staff

Jennifer Voiles, MBA

Jen Voiles is the NSGPF Office Manager and Bookkeeper. She is an independent contractor providing financial and administrative support to various small businesses and nonprofits. Jen also has more than 25 years of experience working in large corporations with a focus on finance, accounting, planning, and operations. She is passionate about helping others and enjoys music, animals, and nature.


6 O'Leary Way, #84

Jamaica Plain, MA 02130

Powered by Wild Apricot Membership Software