Field Trip Amsterdam

Field Trip Amsterdam offers you a wide range of truffle programs. Our center is designed to promote a process of self-discovery and inner healing in an inspiring, meditative and soothing environment.

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Contact details:

Piet Heinkade 55, 1019 GM Amsterdam

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The Field Trip Amsterdam Team

Meet our team of experienced professionals.

Onur Yildirim

Director of Clinical Operations

An entrepreneur at heart, Onur originally trained in clinical psychology and worked as a psychologist during the first years of his career. Later, Onur earned his PhD in neuroscience from Radboud University and worked in the R&D and MA of renowned pharmaceutical companies such as Johnson & Johnson and Novartis, where he championed the research of psychedelic molecules as potential antidepressants. After his time in the pharmaceutical industry, he began his entrepreneurial career which eventually led him to Field Trip.

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Hasret Alakus

Business Manager

Hasret has experience in social work, industrial engineering, IT, and management. He started his career at Alfa Laval, after which he got the opportunity to work at Cecil Alliance. There he fulfilled the role of project manager/business manager. After Cecil Alliance, he worked as a Business Consultant before starting the new adventure at Field Trip.

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Hans van Wechem


Hans has almost 30 years of experience in psychiatry and started his career as a registered couples and family therapist before specializing in (group) psychotherapy of patients with early childhood trauma and attachment disorders. After a life-changing psychedelic experience, he recognized the potential of psychedelics in therapy. He now contributes to projects such as MAPS in their efforts to investigate MDMA for the treatment of PTSD and has a wide network in the psychedelic community. His main interest lies in contributing to a future in which the use of psychedelics will become widely accepted, both as an evidence-based treatment and as a powerful catalyst for personal and spiritual growth.

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Jeanine Souren

Head Therapist

With an extensive professional career in mental health, Jeanine holds degrees (both MSc and specialisations) in psychology, psychotherapy, clinical sexology and couples & family therapy. She is accredited and licensed in the Netherlands and has worked as a lead clinician in several mental health settings. She is passionate about the therapeutic potential of psychedelics in combination with psychotherapy. Jeanine believes that by tapping into the deep psyche through psychedelics, suppressed patterns, emotions and beliefs can be made conscious again, allowing for healthy change.

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Fleur van den Elzen


Fleur is a psychodrama therapist who specialises in schema-focused therapy. She has a lot of experience with treating people with personality disorders, depression, anxiety, trauma and addiction. Her way of working is serious but playful, confronting and easy to apply in daily life. As a kind of "Rehearsal of Life" Fleur supports the playing of real life events, emotions, thoughts, dreams, fantasies or 'unfinished business'. She makes space for healing through action. The spirited exploration and discovery leads to an encounter with yourself that is more powerful than if only verbal exchange were the medium.

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Drew Puxty

Facilitator Therapist

Drew is a registered psychologist in the Netherlands with a Research Master's degree in Cognitive and Clinical Neuroscience from Maastricht University. He has experience working in an international private clinic specializing in the treatment of personality disorders, trauma and addiction; and as a researcher investigating the neuropsychological effects and clinical application of psychedelic substances. He is passionate and knowledgeable about the value that psychedelics can bring to the lives of individuals seeking alternatives to currently available approaches. He brings an empathetic, non-judgmental approach to his work.

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Mona Irrmischer

Facilitator Therapist

Mona is a neuropsychologist and received her PhD at the Vrije Universiteit of Amsterdam on research into the effects of meditation and yoga. She has completed a course in psychotherapy and works as a researcher, freelance psychologist and registered mindfulness and compassion trainer. Her current research concerns the role of warm, non-judgmental presence with each other. This is also the basis of her approach in therapy and also in her experience of facilitating psychedelic experiences. Her non-judgmental approach and her multidisciplinary background enable her clients to integrate important aspects in life. Her qualities make her a warm and empathetic facilitator and therapist.

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Antine van Leest

Office Admin / Host

Hospitality and hostmanship are anchored in Antine's personality. She has been active in the hospitality industry for more than 30 years, holding positions as F&B manager, Event manager, Manager Front Office at theatre and museum. Receiving guests, caring for them, offering a listening ear, creating an atmosphere with attention and love give her wings. Making the connection that creates something beautiful fascinates her and gives her a good feeling. The art of making people feel welcome, where expectations are not only met but exceeded, that is Antine's mission. Passionate about this way of hospitality, she is committed to make Field Trip Amsterdam the most hospitable centre of the Netherlands with dedication, enthusiasm, determination and pleasure.

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Thor Kristjánsson

Care Coordinator

Thor was born and raised in Iceland and has spent his life travelling and living in various countries such as Costa Rica, Florence, Berlin and Amsterdam. Hospitality, travel and photography have gone hand in hand for Thor over the years, eventually leading him to Amsterdam where he received his BBA degree in Hospitality Business Management. Thor's passion for psychedelics can be traced back to travels through the Peruvian rainforest, but came back to life when he moved to the Netherlands.

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Ellen van Wel


Ellen has over 25 years of experience as a psychiatric nurse. She works on the basis of the holistic approach and believes that psychedelic-assisted therapy can be a nice alternative for people who want to go further than just treating symptoms. At Field Trip Ellen will monitor the mental and physical well-being during the sessions. She is an enthusiastic, sensitive and dedicated person and loves to spend time in nature. The power of authenticity in and with ourselves and each other is inspiring to her.

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