Ready to open a door to a different perspective?
I’m Dorien — also known as Door of Perception. I facilitate psychedelic experiences with psilocybin truffles with a safe, grounded, and carefully guided approach.
I offer 1-on-1 psychedelic sessions in my practice in Amsterdam, and I’ve created an online toolkit for people who want to work with psychedelics responsibly in their own home setting. I also facilitate small-scale group experiences for mothers and offer masterclasses for beginning psychedelic guides.
Is this for you?
People who come to me are often looking to shift something in their lives. Sometimes it’s about feeling more connected to themselves or others. Sometimes it’s about gaining a new perspective on something they feel stuck in. And sometimes it comes from simple curiosity about what psychedelic experiences can open up.
A psychedelic journey is not meant as a quick fix or an escape, but it can act as a catalyst for a process that is already unfolding within you.
What is waiting for you on the other side of that door?
About me
For more than 25 years, I’ve been exploring psychedelics, altered states of consciousness, and the ways these experiences can bring meaning, insight, and transformation into our lives.
Over the years, this evolved into practical experience in psychedelic guidance and supporting people through profound inner processes. I have a background in medical anthropology (MSc) and was the founder of the OPEN Foundation, an organization that has been dedicated to scientific research into psychedelics and the responsible development of the psychedelic field for nearly 20 years.
In my work, I combine experience, compassion, and a grounded approach. Safety, preparation, and integration are central throughout the process — while making space for everything a psychedelic experience may bring into motion.
Professional approach
In my work, safety and preparation are central throughout the process, alongside respect for the intensity of psychedelic experiences and realistic expectations about what these experiences can — and cannot — offer. My approach is trauma-sensitive and mindful of the vulnerability that can arise in altered states of consciousness. Careful screening is therefore an important part of the preparation process.
I have been actively involved in the broader psychedelic field for many years. I served on the board of the OPEN Foundation for more than 15 years, where I contributed to the development of the organization and helped initiate ICPR, a large international psychedelic conference that OPEN has organized every two years since 2010. I currently work as an experiential facilitator at ADEPT, a two-year training program for therapists who want to learn how to work with psychedelics. This ongoing involvement reflects my commitment to ethics, quality, and the responsible development of the psychedelic field.
I am a member of the professional association for psychedelic guides in the Netherlands, the Guild of Guides and adhere to its Code of Conduct, which is based on care, respect, integrity, and professional responsibility.
If you have any questions or concerns, I invite you to discuss them with me directly in the first instance. In addition, the Guild of Guides offers an independent and confidential reporting point for any complaints.
My Services
Guided psilocybin truffle journeys in Amsterdam, with an emphasis on thorough preparation and a safe setting. A program consists of a screening and a minimum of 3 meetings.
A comprehensive toolkit for people who want to work with psychedelics in a conscious and responsible way in a home setting, with support from a tripsitter from their own network.
Consultations for (beginning) guides in the field & professionals interested in psychedelic facilitation. We address questions related to safety, preparation, ethics, and practical experience.
This fall I will be starting a small-scale and in-depth group program for mothers, consisting of monthly women’s circles and a guided group session with truffles. This program is offered Dutch.
Which treasures within yourself are waiting to be uncovered?
Client experiences
My truffle session with Dorien was life-changing. After more than half a year of drifting through a state of indecision and lethargy, I was able to close a chapter in my life. Dorien gives you the space and safety to let your experience fully unfold. She is completely present with unconditional, loving attention. At the same time, she is very grounded and down-to-earth—qualities that are not always common in this field. I have recommended several friends to her for a reason.
V.B. | 29 years
If you are looking for a safe and supported psychedelic experience, I would totally recommend Dorien to guide you. She was really transparent about what to expect and helped me make a realistic planning for when the journey should take place. I wanted to rush it, but she advised me to take a step back and make sure that I had the right support system in place to build up to the experience and to help me afterwards. For me the experience was greatly impactful; I felt Dorien had set the right conditions for me to “Trust and Let Go”. The experience opened a new dimension into my being and I was able to regain the ability to appreciate what life is worth living for.
Mary | 29 jaar
Dorien is a true professional through and through. From start to finish, she guided me through her Psychedelic Coach process. She supported me through a life-changing transition. By preparing me thoroughly for the session, putting me at ease, and guiding me through the process with great skill, I am now able to resume my career and personal life with renewed strength and insight. In my view, her programs should be covered by health insurance. It is a process that every self-respecting person should go through at least once in their lifetime
D.H | 40 years
Dorien prepared me really well for the journey by being very realistic and clearly explaining the practical aspects. It felt very clear and not at all ‘woo-woo’, something I am quite allergic to. She also listened carefully to my story and continuously checked what felt right for me. What I appreciated is that I could discuss everything in advance, including my doubts and fears. Because of this preparation, I felt so much trust that I was able to fully let go during my trip. I had an incredibly beautiful and visual experience. Afterwards I was full of all the amazing things I had seen. However, the week after I was also overwhelmed by emotions. That is why I was really glad I could talk with Dorien afterwards about everything that had happened during my psychedelic experience and how to integrate it into my life.
Zaida, 36 years
When I started looking for someone to guide me through a truffle session, two things were essential to me: first, I wanted to feel safe enough to fully surrender to the experience, and secondly, I wanted a grounded facilitator. No fluff or “woo-woo”. In Dorien, I found this combination. The result was a truffle session in which I was able to fully open up and relax into the experience.
Surrendering to an experience requires trust. This trust was strengthened by, for example, the preparatory exercises you are invited to work with before the session. In that sense, the journey already begins before you have taken the truffles. The process is already set in motion. The questions encourage you to reflect deeply on who you are and where you stand in life. The guided meditation helped me start the journey in a relaxed state. Everything I had been worrying about along the way faded into the background. I was able to effortlessly let myself be carried by the flow and explore with curiosity.
Marijn | 50 years
I experienced Dorien as a very pleasant guide during my truffle journey, both in the preparation and on the day itself. She is engaged, experienced, and understanding. Not too present, not too distant. I look back on this special and inspiring experience with a good feeling, and I would without hesitation recommend others to embark on this journey with Dorien.
M.H.
I found the music incredibly helpful, and I would not have been able to find it on my own. I felt that your guidance was essential in my process. Not only because of the preparatory conversations, the inspirational exercises, the meditation, and your physical support, but also because of your music selection and your sense of when to introduce it during the process. That is truly a gift.
M.E.
I had a very beautiful truffle journey under the guidance of Dorien. Even months later, I still feel the after-effects through the profound experience and the valuable insights I gained. The strength of the experience lies not only in the personal guidance, but also in the entire preparation for the journey.
The inspirational exercises helped me clarify my intention. This allowed me to deepen my involvement in the process and get even more out of the experience. The meditation prior to the truffle journey was very helpful in letting go of everything else and becoming fully ready to enter the experience. All in all, I found it to be a very impactful experience that continues to bring me joy in daily life to this day.
M.E.