World Conference 2026 Program Co-Chairs
Jacqueline A-Tjak, Ph.D. is a registered Clinical Psychologist and Psychotherapist and has worked in inpatient and outpatient facilities in the Netherlands, with patients with different kinds of disorders. She was trained in CBT and is a Supervisor with the VGCt. She started her training in ACT in 2004, is a peer reviewed ACT trainer, and a ACBS Fellow. She attended almost all World conferences since 2006. In her PhD research she compared the efficacy of CBT with ACT for depression.
Dr. Jean-Christophe Seznec is a psychiatrist, former head of clinic, sports medicine physician, lecturer, author of numerous books on ACT, and blogger. He was the president of the French ACT chapter. He teaches meditation and has developed several programs for phone apps, as well as ACT. He teaches at numerous universities. He is a member of the scientific committee of Santé Publique France for the development of soft skills in adolescents, of InspiR, which implements soft skills programs for adolescents, and of La Vie Kintsugi, for the development of health coaching in cancer. He is a specialist in trichotillomania and sports psychologie. He is a member of the medical committee of the French Rugby Federation. He is a trained clown and developed ACT through clowning.
Special thanks to the 2026 Program Committee:
Bara Al-Saleem
Courtney Barry
Taís Bento
Olga Berkout
Jenny Blaauwbroek
John Blackledge
Michael Bordieri
Alice Boudon
Puihan Joyce Chao
Connie Chong
Angela Coreil
Howard Crumpton
Emma Delemere
Peter Delsink
Frédérick Dionne
Rivka Edery
Colleen Ehrnstrom
River Farrell
Paula Carolina Fernandez Diaz
Laurie Gallo
Jennifer Gregg
Arryn Guy
Amy House
Abby Hurley
Sandi James
Daniel Johnson
Dawn Johnson
Rosie Jones
Aurelie Julien
Jennifer Kemp
Valerie Kiel
Seint Kokokyi
Ching Yee Lam
Andreas Larsson
Lou Lasprugato
Ineke Lauwen
Jenna LeJeune
Francis Lemay
Daniel Maitland
Wesley Malvini
Staci Martin
Tierney McMahon
Elijah Meason
Siri Ming
DJ Moran
Jose Moreno
Miranda Morris
Cecile Morva
Yannick Morvan
Frank Mutterlose
Manuela O'Connell
Margot Osorio
Ray Owen
Thibaut Paranthoen
Clio Pitula
Victoria Powers
Nanni Presti
Jiayin Ruan
Francisco J. Ruiz
Stavroula Sanida
Eugen Secara
Matthew Skinta
Gita Srikanth
Alison Stapleton
Sara Styles
Thamara Tabera
Steven Topper
Niklas Törneke
Sanna Turakka
Sheri Turrell
Vincent van Bruggen
Lauren Venable
Jeanette Villanueva
Harry Voulgarakis
Jasmine Wilson
Leslie Worley
Joann Wright
Sean Wright
Amie Zarling
Patricia Zurita Ona