Team

Our Team

We emphasize collaborative preparation and integration between patient and therapist.
Our diverse experience and training allows us to provide a multi-disciplinary approach.

MD | Owner & Medical Director

Ben Mati

Dr. Benjamin Mati is dedicated to the safe, effective, and therapeutic use of ketamine to help people discover their own healing potential. He does medical intakes and preparations, and is present at ketamine sessions.

Ben studied anthropology and environmental science at New York University, went to Jefferson Medical College in Philadelphia, completed a family medicine residency at Ventura County Medical Center (VCMC), and then completed both an acute care fellowship and a point of care ultrasound fellowship. Since then, he has been working in the emergency department, intensive care unit, and at critical access hospitals while also teaching procedural medicine and point of care ultrasound across the country.

Ben completed Ketamine Assisted Therapy training at The Ketamine Training Center and earned a certificate in Psychedelic Assisted Therapy from Naropa University. He has also completed the MDMA Assisted Therapy educational training from the Multidisciplinary Association of Psychedelic Studies (MAPS). Ben did the Primary Care Psychiatry fellowship at UC Irvine Medical School and is currently completing the Hakomi Training program. He is in the Earth Awareness Meditation Teacher Training program and will be in the 2026 Upaya Buddhist Chaplaincy training cohort.

MA, LMFT, APCC, ACC | Therapist

Colleen OBrien

Colleen is a licensed marriage and family therapist whose practice focuses on trauma, assault, addiction and recovery, eating disorders,intimate partner violence, and child abuse. Colleen has been practicing Ketamine Assisted Psychotherapy (KAP) for several years with an emphasis on treating depression, anxiety, PTSD, and trauma resolution. Colleen trained at the Ketamine Training Center in San Rafael, California with Phil Wolfson and his team. She also studied under the direction of Jeffrey Becker, MD and is an active member of Ketamine Providers Association and American Society of Ketamine Physicians, Practitioners, and Psychotherapists.

LPCC

Wendy Elliott

Wendy's unique therapeutic approach, honed over forty years as a Somatic Depth Psychotherapist, sets her apart. She skillfully connects body, mind, and soul with qualifications as a Licensed Professional Clinical Counselor (LPCC), Board-Certified Dance Movement Therapist (BC-DMT), Certified Somatic Experiencing Practitioner (SEP), Certified Psilocybin Assisted Therapist (PAT), Certified Ketamine Assisted Therapist (KAT), Authentic Movement Facilitator, Mindfulness-Based Stress Reduction Practitioner (MBSR), and Registered Yoga Teacher (RYT). Her enthusiasm for exploration shines through as she gently guides her clients between the spaces of knowing and unknowing to reveal possibility, creativity, and greater aliveness.

Co-Founder | Experience Leader & Creative Director

Jennifer Brenneman

Jennifer has been supporting and leading wellness brands for over 8 years. She leads Experience for Horizon Healing and will likely pop into your inbox at some point along your journey with us.

Jennifer is an artist, adventure seeker, healer, designer, and branding specialist committed to reconnecting ourselves to our inner knowing. She hopes that our work together empowers you to truly thrive.

Between creative pursuits, and doing work she loves, you'll find her swimming in the ocean, painting, and chasing sunsets with her dog Lucille.

AMFT

Moriah Stapf

Moriah is an Associate Marriage and Family Therapist (AMFT #140412, supervised by Wendy Elliott) who supports young adults in building deeper connection—to self, others, and the world. A Certified Somatic Psychotherapist, she specializes in helping clients heal from trauma, break free from limiting beliefs, and clarify their path forward to live more embodied, authentic, and fulfilling lives. Her practice is holistically informed by additional certifications as a Ketamine-Assisted Practitioner, Mind-Body Eating Coach, and Equine-Assisted Facilitator, honoring the innate link between mind, body, and spirit. Moriah is committed to providing a safe and compassionate space for your personal transformation.

L.Ac, MSAOM | Acupuncturist and herbalist

Jiling Lin

Jiling Lin is a Licensed Acupuncturist (LAc), herbalist, and artist in Ventura, CA. Jiling provides integrative medicine and experiential education for thriving personal and ecological wellness through gentle acupuncture and herbs, accessible lifestyle solutions, and empowering classes and retreats integrating nature, art, movement, and ritual. “Tea Talks” podcast host on Herbal Radio and writer for various publications, Jiling also loves surfing, backpacking, and gardening and is writing her first book about Five Elements Lifestyle Medicine! Visit Jiling at JilingLin.com and join her newsletter for seasonal beauty.

You may see her if you sign up for one of our AcuKAP Groups.

DC, MSN, RN | Experienced Sitter

Brenda Parsons

Brenda brings over 3 decades of multidisciplinary professional experience and passion for promoting true healing at Horizon Healing.
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Brenda’s work is grounded in her strong conviction that true healing happens from within— from understanding, supporting and nurturing mind, body and soul. Her personal journey has included utilizing multiple alternative medicine modalities, holotropic breathwork, meditation, compassionate inquiry, movement therapy, and psychotropic medicines. Her specific areas of interest include the effects of psychotropic-assisted therapy in improving overall quality of life and performance, as well as the use of ketamine and other entheogens as part of palliative and end-of-life care.

You may meet Brenda if you join a group session.

Workshops

Dr. Picolya McCall

Dr. McCall-Robinson loves sharing knowledge about psychology whenever she can. She is currently working as an adjunct instructor at the Los Angeles Community College District, as well as the Chicago School of Professional Psychology. In these capacities, she continuously shares her knowledge about working with underserved populations, minority groups, and the most vulnerable people within society. These teaching opportunities also offer her an opportunity to share her professional and personal experience as a psychotherapist. When she is not teaching, she is utilizing her professional background education inputs and private clients (life coaching and consulting) or acting as a guest speaker to student conferences, seminars in organizations, or in offering live webinars.

You may meet Picolya at a workshop if you are a clinician.