Meet Our Team
of Psychologists & Clinicians
At Duality Psychological Services, you are supported by a team of doctoral-level psychologists and master’s-level clinicians who combine clinical depth with genuine compassion.
Our practice was built on a clear belief: people don’t need to be “fixed.” They need clarity, honest support, and tools that respect their individuality so they can regain balance and a sense of power in their lives.
Our Approach as a Team
Our clinicians are guided by shared values that shape every interaction:
Compassion – Your lived experiences are valid and deserve understanding.
Clarity – Insight is foundational. We help you understand what’s happening and what to do next.
Empowerment – We don’t create dependence. We help you build tools and internal resources so you can be your own therapist over time.
Balance – Many clients come in feeling overwhelmed or stuck. We help you move toward steadiness and groundedness.
Dr. Joel Frank, Psy.D.
Founder & Licensed Psychologist
Dr. Joel Frank leads both the therapy and testing branches of Duality. His work centers on complex trauma, PTSD, ADHD, autism, and neuropsychological concerns such as concussion and TBI.
Joel’s approach is shaped by his own lived experience of feeling overwhelmed, overworked, and stuck. He knows what it’s like to feel powerless, and he uses that understanding to help clients restore balance, direction, and personal agency.
Clients often describe him as direct, compassionate, and deeply curious—someone who helps them understand themselves more clearly and take meaningful action.
Meet the Other Psychologists on Our Team
Dr. Regine Muradian, Psy.D.
Dr. Regine Muradian is a licensed clinical psychologist, author, and mental health advocate specializing in ADHD, anxiety, depression, and executive functioning. Fluent in French and Romanian, she integrates her multicultural background into her work with children, teens, and adults. A Certified Clinical Anxiety Treatment Professional, she also conducts psychological assessments and leads workshops on parenting, leadership, and communication.
Ms. Melissa Briseno-Vasquez, LCSW
Melissa Briseno-Vasquez is a Licensed Clinical Social Worker who supports clients navigating trauma, PTSD, depression, anxiety, gender dysphoria, relationship challenges, and co-occurring substance use concerns. Trained in EMDR, Melissa integrates trauma-focused care with CBT, Psychodynamic Therapy, and Motivational Interviewing to help clients build insight, resilience, and practical tools for meaningful change.
Ms. Yasi Nia, M.A.
Specializes in mood concerns, burnout, grief, and clients who feel disconnected from themselves. Helps individuals regain balance, insight, and a sense of internal stability.
Ready for Support That Brings Clarity?
Duality Psychological Services offers therapy and psychological testing in Sherman Oaks to help you understand your patterns, feel grounded, and move forward with more clarity. When you’re ready, we are here to talk through what you’re facing and help you take the next step.