Transformance Journal Member: Experiential Assistants

Joshua DeSilva, PsyD, CGP

Joshua DeSilva, PsyD, CGP (they/them) guest presented in the AEDP Institute-sponsored seminar, “Wounds We Cannot See” in October, 2020 and currently serves on the AEDP Institute’s DBEI Committee. Joshua is a licensed psychologist in Virginia and DC. They identify as a nonbinary Latine person of queer experience. Their family immigrated from Venezuela and maintains strong ties to Latin America. Growing up in the Midwest as a first generation American and attending college and graduate school as a first generation student has powerfully impacted their sense of the importance (and difficulty) of empowering diverse groups to live and learn in spaces that have historically been oppressive and unwelcoming. Professionally, Dr. DeSilva (Josh) is the Associate Director and Director of Training at American University Counseling Center. Josh feels lucky to be a part of the future of psychology in this role. They were appointed by Governor Ralph Northam to serve as a Member of the Virginia Latino Advisory Board and currently serve as Vice Chair of the Board. (Read More…)


Mariana Barstad

Barstad, MarianaMariana Barstad, PhD in Clinical Psychology. Specialist in Medical Psychology, Psycho-Oncology and Psychological First Aid; Clinical Supervisor; Works in private practice.


Steve Carroll

Steve Carroll, LCSW is a psychotherapist in private  practice since 1988 working with individuals, couples and  families as well as supervision/consultation for  colleagues. Prior to private practice he co-developed a  treatment unit for families experiencing child sexual  abuse, supervised a group home for adolescent girls and  supervised an outpatient therapy program for a family  service agency. He is a certified Imago therapist/ supervisor and other background training includes  psychodynamic psychotherapy, object relations, family  systems, Internal Family Systems and Focusing-Oriented  Psychotherapy. 

Steve completed AEDP’s Immersion Course with Diana  Fosha in 2008 and three years of Core Training with Eileen Russell. He has assisted in numerous Immersion Courses, ESI and II and Wired For Healing Workshop with Diana. 

(Read More…)


Gregory Czyszczon

Czyszczon, GregoryGreg Czyszczon, Ph.D., LPC, is from Harrisonburg, Virginia where he teaches counseling and has a private counseling practice. He is also a clinical supervisor for the Secure Child Program, an organization providing attachment-based interventions that focus on the parent/child relationship.

Greg made his way to AEDP via interpersonal neurobiology as well as a supervision group led by David Waters, Ph.D., in Charlottesville, VA


Heidi Frieze

Heidi Frieze, LCSW is a certified AEDP therapist and supervisor. She is currently in private practice near Grand Central Station in New York City, and in Westchester, NY, where she treats both individual adults and couples. Heidi earned her Masters Degree in Clinical Social Work from Fordham University in 2004.

She participated in Diana Fosha’s first AEDP Immersion Course and completed one year of Core training with Diana. Over the years, Heidi has been in individual supervision with Eileen Russell and SueAnne Piliero and small group supervision with Ben Lipton. Heidi has assisted SueAnne in two previous Essential Skills I Training Courses in NYC and in a number of immersion courses.

She also assisted Diana Fosha at a weekend workshop at the Kripalu Center in the Berkshires, MA. Prior to becoming a psychotherapist, (Read More…)


Heather Gretton

Gretton, HeatherHeather Gretton, Ph.D. R.Psych. has more than 20 years experience working with adults, youth, and couples. She completed the AEDP Immersion Course in 2014, and continued with Essential Skills 1 and 2, and Core Training. She has received extensive individual and group supervision and has assisted at a variety of different training courses.

Dr. Gretton is involved in AEDP research and contributed as a co-author to the first AEDP Outcome Study. She is drawn to AEDP as a model of therapy that weaves together science, theory, and clinical knowledge with the authentic and therapeutic use of the self, to promote transformational and hope-filled change


Liza Greville, LCSW

Liza Greville, LCSW, is a Certified AEDP Therapist and Supervisor in private practice in Kane, Pennsylvania, and offers individual therapy to adults in Pennsylvania, New York and Montana, as well as individual and group supervision.

Liza trusts that people heal and grow when they have what they need. In turn, she loves all the ways AEDP theory and maps provide channels of understanding through which ways of nurturing new and needed experiences can flow, both intrapersonally and interpersonally. She believes the same holds true in supervision, and seeks to help supervisees expand their naturalness of use of self, and deepen their understanding of AEDP’s affective change processes. (Read More…)


Elizabeth Perkins, LMFT

Elizabeth Perkins, LMFT is in private practice in San Diego, California and currently is seeing clients online who reside in California. She has been strongly influenced by AEDP since she began learning the model in 2013. She is a Certified AEDP therapist and Supervisor in-training. L

iz thrives on fine tuning her skills in bi-weekly supervision with Senior Faculty, regularly assisting at  AEDP Essential Skills courses and attending other AEDP trainings. AEDP continues to be the heart of her client work. Liz feels like AEDP is responsible for the most memorable and meaningful breakthrough moments in her sessions.

She feels constantly challenged by the model and astounded by its results, in equal parts. Liz is most looking forward to witnessing the aha moments that inevitably occur within herself and the other practitioners each time she has the honor of assisting at an AEDP learning event.


Goretti Faria, MSW, RCSW, CCC

Goretti Faria, MSW, RCSW, CCC is a Certified AEDP Therapist and  Supervisor. She has a private practice in Fort Langley, BC. After  completing the Immersion Course in 2014, she went on to complete  Essential Skills 1&2 in San Francisco and New York, Core Training in  Vancouver, and extensive individual supervision. She has assisted at  various training courses throughout Canada and the US, and held the Lead Assistant role for many ES1 and ES2 courses across the globe.

Since  finding her therapeutic home in AEDP in 2014 and every step along the  learning journey, Goretti has experienced the
personal and professional transformative power of the model. She is deeply appreciative of her  clients’ trust in the safety of
the collaborative process and the mutually  transformative journey.


Lia Jones, LMFT

Lia Jones, LMFT is a certified Therapist and Supervisor in both AEDP and EFT in Denver, Colorado. She has worked with children and families experiencing homelessness in non-profit mental health services and has been in private practice since 1998.. Lia has served as both an assistant and Lead Assistant at multiple Immersion and Essential Skills trainings and helms multi-faculty core training groups in Denver. She teaches core training modules, introductions to and specific topics on AEDP to professional and student communities.

Lia is the founder of AEDP Rocky Mountains, a community group that sponsors AEDP workshops and community lunch and learns for practitioners learning the AEDP model. In addition to her practice, community work, and teaching, she offers group and individual supervision live and online. Lia has been delighting in AEDP since the 2003 Immersion followed by three years (Read More…)