The Team
We’re a supportive and experienced team dedicated to creating spaces for healing, connection, and growth. Grounded in science and inspired by Jewish spirituality, we meet each person with care, presence, and respect. Our aim is to help people reconnect with themselves, with others, and with the world around them.
Hanna Radomski
Lic. Psychotherapist, CEO
Hanna has many years of experience in psychological treatment, with a focus on affect-focused therapy (ISTDP). She also works with training and supervising other psychologists and psychotherapists. For the past three years, Hanna has combined her psychotherapy practice in Malmö, Sweden, with her work as a facilitator at psychedelic retreats in the Netherlands. She has extensive experience in screening, preparing, and supporting participants through psychedelic experiences, as well as assisting with integration afterwards.
Hanna will be the lead facilitator on the retreats.
Susanna Hinderks
Body Coach, Yoga Teacher and facilitator
Susanna is a body-oriented coach and yoga therapist with a long-standing involvement in the psychedelic community in the Netherlands. Over the past 20 years, she has had a deep passion for psychedelic research, and her experience in supporting individuals through altered states of consciousness spans more than a decade. She has worked for multiple practitioners as well as in her own company.
Eli Gottlieb
Lic. Psychotherapist, Clinical Psychologist
Elie is an integrative psychotherapist and clinical psychologist, trained in CBT, EMDR, sexology and psychedelic‑assisted therapy. He will be an assistant during the retreats.
Elie has a deep passion for a fair and regulated access to psychedelic assisted therapy and is Luxembourg’s national coordinator for PsychedeliCare.
David Sjöström
MD
Medical advisor.
David Sjöström is a licensed physician with long experience in psychiatry. He conducts research on topics including psilocybin-assisted therapy for patients with anorexia.
Our mission
At Ketter, we guide people back to themselves, to one another, and to the natural world. Through carefully held retreats, we support healing, the release of trauma, the exploration of altered states of consciousness, and meaningful shifts in perspective. We believe that inner growth, creativity, and connection are vital for both individual well-being and collective transformation.
By fostering conscious community and encouraging personal inquiry, we hope to contribute to a more humane world and to the ongoing conversation around the safe and intentional use of psychedelics in therapeutic and spiritual contexts.
Our vision
We want to create spaces where people can safely explore their inner worlds – with honesty, care, and support. At Ketter, we offer a legal and structured setting for personal transformation, healing, and growth, free from judgment and pressure.
Our vision is to help people reconnect with themselves, with others, with nature, and with a sense of belonging. Through shared experiences, meaningful conversations, and supportive environments, we aim to make inner work more accessible, grounded, and connected to everyday life.
Our values
We value respect and integrity in everything we do. We communicate with clarity and transparency, and honour confidentiality. Psychological safety and informed choice are central to our work. We take responsibility, both during and after the program. We meet each person with cultural sensitivity and emotional presence.
We believe in connection: to self, to others, and to the world. Our practice is grounded in science, shaped by experience, and sustained through ongoing learning. Above all, we are committed to care, sustainability, and the principle of do-no-harm.