The Treehouse Team

Master Clinician

Mary Ruth Cross

Owner of Treehouse Family Counseling Services

Mary3 (1)Mary Ruth Cross is a licensed Marriage and Family Therapist and Counselor Educator with over 20 years experience in the mental health field. Mary Ruth has provided counseling’s education with the University of Phoenix Bay Area Campus. She has also been on faculty with John F. Kennedy University and been a nationally recognized speaker on play therapy. She works in private practice in San Ramon CA and is the Clinical Director for Tree House Family Counseling Services, PC where she trains and supervises interns and trainees. Mary Ruth is a Registered Play Therapist Supervisor as well as past president for the California Association for Play Therapy and a member in good standing with the Association of Play Therapy, California Association for Marriage and Family Therapy and the American Counseling Association.

Staff Therapist

Michelle Culver

Michelle Culver is a licensed Marriage and Family Therapist with over 15 years’ experience in the field of trauma through various roles (researcher, educator, author, therapist). Michelle’s background in developmental psychology has informed her clinical work with clients of all ages. She has worked with clients through each developmental stage, from age 1 to adulthood, and enjoys witnessing how therapy can help clients achieve their developmental and relationship goals. Michelle’s clinical experience includes: child abuse, trauma, anxiety, depression, sensory challenges, emotion dysregulation, relationship difficulties, and attachment issues. Michelle individualizes therapy to each client and draws on various techniques, such as those found in play therapy, attachment theory, physiological theories, sensory processing, family systems theories, and strength based theories. She provides therapy to individuals, couples, and families with the goal being improved relationships and overall mental health. Michelle is invested in her clients’ health and well-being and is committed to assisting each and every one become their best self.

Michelle has a BA in psychology and a MA in developmental psychology from UC Davis, and a MS in Counseling from University of Phoenix. She has worked in county mental health programs, school settings, and in conjunction with Child Protective Services, law enforcement, and medical staff.

Amber Sanner

Amber is a licensed Marriage and Family Therapist with more than nine years experience providing therapy and services to children, adolescents, parents and adults. Amber has provided psychotherapy in public schools and in private practice. She has experience working with children who have endured a variety of stressors including divorce and adoption, family reunification or who struggle with impulse control, anxiety, anger, peer and family relationships, ADD/ADHD, grief and loss, PTSD, pregnancy, depression, trauma, suicidality or academic difficulties due to mental health issues.

Amber uses a variety of treatment approaches to meet the needs of each individual. Her collaborative style combines play therapy, family systems theory, behavioral therapy and strength based theories. She provides therapy to individuals, and families to help them develop new skills and strategies to overcome the challenges they face to reduce stress and promote overall wellness.

Amber has a BA in Psychology and a MS in Counseling from San Francisco State University and has a PPS Credential in School Counseling.

Christine Holmberg

Christine is a licensed Marriage Family Therapist, and is nearing completion of her license as a Professional Clinical Counselor. She has nine years of experience providing therapy to children, adolescents and their families. Prior to her time as a mental health therapist, Christine spent three years working as an Applied Behavioral Analyst working with children diagnosed with autism. While Christine has experience providing mental health therapy to individuals of all ages and ethnic backgrounds, she has a keen interest and passion for working with children and adolescents. Her clinical experience includes: depression, anxiety, child abuse, foster care youth, self-esteem and body image issues, parenting challenges, family-of-origin and relationship issues and trauma.

Christine’s approach to therapy is based on holistic values. She addresses each individual as a whole and complete person as they are today, and not as an individual who is broken or needs to be fixed. In sessions, she strives to create safety through listening deeply, providing compassion and appreciating the innate value of her clients. She uses humor, education, reflective listening, meditation, art and body-based techniques.


Harmony Quinn, Classical Homeopath

Harmony is a classically trained Homeopath with over 14 years’ experience working with clients of all ages, from infancy through adulthood. Harmony consults with clients for a wide range of ailments including mental health (depression, anxiety, ADHD), behavioral issues, sleep, physical (headaches, allergies, skin ailments), and acute illnesses. As a classical Homeopath, Harmony seeks to understand how the client functions on all levels (mental, emotional, and physical) in order to recommend a Homeopathic remedy that best matches the whole client. This remedy then serves to increase the client’s overall vitality and immune functioning, thereby enabling their body to heal itself. Homeopathy is thus applicable to most energy states the body can experience and the corresponding symptoms, ailments, and illnesses which it can produce. Harmony is passionate about helping her clients remove illness on all levels and achieve increased states of health and functioning.

Harmony has a BA in Psychology from UC Davis, a CHom from Pacific Academy of Homeopathy, and has further studied nutrition, health and fitness. She was raised by two classical Homeopath parents, experiencing firsthand Homeopathy’s incredible healing power since childhood. Harmony teaches Introduction to Homeopathy and Homeopathic First Aid workshops and has been in private practice since 2008.


Jolen  Philbrook

 Jolen loves to inspire and empower you, as you make the necessary changes in your life. She makes you feel relaxed with her easy going nature. She is compassionate, uplifting, and supportive.   Jolen’s warm and reassuring style helps you feel secure as she guides you to achieve freedom, strength, and success in your life. She believes each person has the power and answers within themselves as she guides you to finding them. She teaches you how to find the power within yourself to transform your perception, integrate and energize a new way of being with strength, balance and joy.

Jolen Philbrook holds a Behavioral Therapist degree and is a Certified Clinical Hypnotherapist along with being a Certified Life Coach. She is a graduate of The California Institute of The Healing Arts and Science. She has completed her advance training for spiritual awareness with the Church of Essence. She is a licensed Spiritual Practitioner with the Center for Spiritual Living. She has been studying the spirit, mind, body connection since 1976. Jolen is a #1 best-selling author of the Gratitude Book Project, Celebrating 365 Days of Gratitude, Reflections, The Power Of Your Dreams and her newest book From Tears to Triumph.