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Suzanne
"This was one of the most profound experiences of my life, and I tend to be a seeker of experiences. I've had a lot of very powerful group experiences, but I was blown away by this one. I didn't expect it to be as powerful. It was a wonderful way to cap the training. Now, in my reflection, I can't imagine going out and doing this work without having completed this part of the training."
Erla
"Watching Costanza and the entire team work together was definitely a learning curve for me. I have immense respect for the way they handle everything with grace. I learned many things there [...] We shared many beautiful, memorable moments together. Honestly, it's something I will never forget. Everything was welcomed and discussed, which truly shows how proficient the retreat team is at their jobs."
Lorilee
"There wasn’t an expectation that we’d be perfect, yet there was a high standard, demonstrated by how the team responded when we brought up questions. I think the genuine care for us permeated my experience both as an observer and as a witness to my colleagues who were learning alongside me. A sense of safety was always present, along with mutual engagement in our collaborative efforts. It all worked out really well because each person brought their unique gifts. Thus, there was a culture of kindness toward one another, and our gifts were truly appreciated. I could see this among the retreat leaders."
Hanneke holds a safe and grounded space for individuals to explore their inner world with honesty, courage, and compassion.
A psychodynamic therapist specialized in trauma and inner child work, she weaves body-based practices, breathwork, hypnotherapy, shadow work, voice dialogue, and psychedelic-assisted approaches to support meaningful transformation.
With a vibrant practice in Amsterdam and extensive experience facilitating retreats and trainings internationally, Hanneke is known for creating attuned, non-judgmental spaces where people can meet themselves more fully.
She brings a grounded presence, a trauma-informed perspective, and a deep commitment to guiding participants toward clarity, wholeness, and inner coherence.
Lesley has four decades of experience as a group facilitator and coach, and in working with altered states as a vehicle for transforming consciousness. She aspires to bring authenticity, courage, tenderness, and joy to all she does.
Lesley embodies a long-term immersion in a number of intersecting healing modalities. Respectful use of psychedelics and plant medicines in ceremonial settings, Buddhist Insight meditation, the Indigenous Red Road practices of Sundance and Sweatlodge, Conscious Connected Breathwork, Family and Organisational Constellations, Archetypal Psychology, 20 years as a leadership consultant and trainer, and 40 years living in an international intentional community have all been part of her path. She is also a professional red-nose clown and clown-doctor.
Her work with Synthesis began in 2021, as a Learning Facilitator and Guest Faculty on the Professional Psychedelic Facilitator training, and ultimately as a Lead Facilitator on the retreat team.
Everything she shares as a facilitator is rooted in her own committed personal practice and ongoing study.
Mary Bredin is a psychotherapist with over 30 years of experience working in a variety of UK healthcare settings as a clinical supervisor, group facilitator, researcher, and educator. She specializes in helping people face loss and change, illness, and death, and is particularly interested in how nature connection, mindfulness, self-compassion, and vision quest rites of passage can support journeys of personal growth, transformation, and healing. In her spare time, she tends an old Cornish garden, which has lots of flowers and brambles. She swims in the sea all year round and loves to walk in wild places.
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Bernardino is a Religion Sociologist and Physiotherapist (specialised in manual therapy and myofascial disorders), born in Venezuela but currently living in Madrid, Spain. He has been studying yoga, meditation and ancient traditions for more than 20 years.
In the last ten years he has worked as a yoga Alliance certifier delivering 200-TTC and workshops all around the world. Having a passionate interest for the use of psychedelics in ancient cultures and religion practices, he is very interested in exploring the effects of psychedelics combined with ancient eastern practices as yoga and Qigong as a way of expanding human consciousness and finding inner balance . Having music background as guitarist and flute player, he enjoys playing music from different traditions in the context psychedelic ceremonies.
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