Bipolar disorder therapists & psychiatrists in Simi Valley, CA

I graduated from Fresno Pacific University-Biblical Seminary in 2014 and obtained my license as a LMFT in 2018. My experience has been working with children, adolescents, families (4 years) and adults (11.5 Years). I have 11.5 years' experience with co-occurring disorders to include severe mental illness and trauma. I have utilized but not limited to the following evidence practices and modalities -ACT, Strength-Base, Family psychoeducation, DBT, CBT, and person centered. I am currently expanding my education/training in Internal Family Systems.

I am a transmasc, queer therapist. My ongoing, personal journey of exploration definitely informs my work as a psychotherapist.

I’ve been working as a mental health professional for over two decades,I have been helping people navigate systems and life changes throughout my career. My goal is to ensure that everyone feels valued and supported in my practice – gay, lesbian, bi, queer, exploring, neurodivergent, polyamorous, kinky, ASE, intersex gender expansive, genderqueer, transgender, nonbinary, and those who are exploring – I want everyone to feel safe, seen and heard in my office.

The focus of my work over the past 25 years has been on fostering a welcoming and inclusive space for individuals across the LGBTQIA+ spectrum – especially those who are questioning or wanting to explore their queer and trans identities in a safe, inclusive space.

I provide individual therapy and work with older teens, young adults to elder audlts who are exploring their gender identities.

It has been a privilege to provide psychotherapy to a variety of clients for over 20 years. I have advanced clinical training in trauma, addictions, sexual abuse, mood and personality disorders, and relationships. My therapeutic style is warm, direct, and encouraging. I provide support as you examine core issues and change underlying patterns of behavior or simply gain perspective concerning a recent issue.

If you're feeling stuck in the same patterns, overwhelmed by your own thoughts, or unsure how to move forward, you're in the right place. I work with adults dealing with anxiety, depression, trauma, and ongoing life stress. A lot of the people I see are looking for clarity, relief, and practical ways to handle what they're going through. Together we'll break things down so they actually make sense and build skills you can use in real life, not just in session, so you leave with a clearer path forward that fits what matters to you.

Demetric “Dee” Marsh, LCSW, JD, is a dedicated behavioral health professional with over 25 years of experience in the mental health field. She is a multistate licensed Licensed Clinical Social Worker and holds a Juris Doctor degree from the Jacob D. Fuchsberg Law School in New York. She earned her Master’s degree in Social Work from Adelphi University, with a specialization in mental health and addictions, and holds a Bachelor’s degree from Hofstra University in Sociology with a minor in Political Science and French Language/Culture.

Dee has extensive experience working in a variety of roles, including psychotherapist, program director, clinical supervisor, adjunct professor, and consultant. She also provides LCSW clinical supervision. Her practice includes working with individuals, families, couples, and groups.

She specializes in a wide range of areas, including anxiety, depression, trauma, stress management, addictions, grief and loss, workplace and employment issues, women’s issues, diversity and cultural concerns, spirituality, and court-related assessments and recommendations, as well as foster care and adoption-related services.

Dee believes in meeting each client where they are and tailoring treatment to their unique needs. She is committed to creating an inclusive, safe, and supportive environment that fosters trust, healing, growth, and a strong therapeutic alliance.

Robert Troy Vander Zwart obtained his Master's Degree at Gordon Conwell Theological Seminary and has over 25 years of experience. Prior to beginning in his private practice Troy worked in a variety of clinical settings. Troy's specialty is counseling individuals with symptoms of depression and anxiety and who have experienced trauma. He also has a passion for couples counseling, marriage and pre-marriage counseling, and family therapy.

Mental health has long been treated as the forgotten side of healthcare — and for me, that's exactly why it matters so much. As a Psychiatric Nurse Practitioner serving clients across California through telehealth and in-person care, I specialize in helping people navigate depression, anxiety, and ADD/ADHD. I believe that when mental health struggles go unaddressed, everything else in life suffers — and that healing is not only possible, it's necessary. When I'm not supporting my clients, you'll find me out in nature, getting lost in a good movie, or discovering new music — small reminders of the joy and balance I encourage my clients to find for themselves.