
Meet the Team
Stewart Psychological Wellness Group
Karen Stewart, Psy. D
Director/Clinical Psychologist

Dr. Karen Stewart is a seasoned clinical psychologist renowned for her expertise in Sexual Dysfunction, Relationships Issues and mood disorders. With over two decades of experience in the field, Dr. Stewart is highly regarded for her compassionate approach to therapy and her commitment to helping individuals and couples overcome their psychological challenges.
Educational Background
Dr. Karen attended James Madison College at Michigan State University and earned a BA in Social Relations. She then completed her Masters and Doctoral Education at the California School of Professional Psychology, earning a doctorate in Clinical Psychology, with an emphasis in Families and Couples work. She has had extensive training in relationship, couples and sex therapy and focused her studies on sexuality, sexual dysfunction and sexual desire disorders. She continues to enrich her education in the topics so she may be the best clinician possible for her patients.
approach to therapy
Dr. Stewart believes in the importance of creating a safe and supportive therapeutic environment where patients feel empowered to explore their thoughts, emotions, and experiences without judgment. She takes a holistic approach to therapy, integrating evidence-based techniques such as cognitive restructuring, exposure therapy, and mindfulness to help clients heal and grow.
Professional Contributions
In addition to her clinical work, Dr. Stewart is actively involved in teaching, training, and supervision. She serves as a mentor to aspiring psychologists. She enjoys her work as a Supervisor to Professional Psychologists, where she provides guidance and interpretation for aspiring Psychologists to grow in their own work and practices.
Natalie Marshman, Psy. D
Professional Psychologist

I value the trust I build with my clients through the transformative power of the therapeutic relationship and I work to create an atmosphere of respect, honesty, acceptance, and warmth. It is a privilege to be able to witness the growth, empowerment, challenges, and self-discovery of my clients and I consider therapy to be sacred work. I utilize a psychodynamic approach in my therapeutic work and have a warm yet direct approach. I specialize in relational work, internal family systems, and believe in a holistic approach to healing, embodiment, and self-acceptance.
Educational Background
I received my B.A. from Emory University in English Literature and a Doctor of Psychology (Psy.D.) degree from The Wright Institute.
approach to therapy
I have worked with children, teenagers, and adults and have worked in a variety of settings, such as community mental health and schools. I completed my pre-doctoral internship at Access Institute in San Francisco, CA. I work with a variety of mental health concerns and life struggles, such as Relationship and attachment difficulties, Depression, Anxiety, Prodromal psychosis, Personality disorders, Phase of life issues, Eating disorders and body image concerns, and Complex Trauma.
Kevin Niehaus, Psy. D
Professional Psychologist

Kevin Niehaus, PsyD. has been in the field of clinical mental health since 2012. Dr. Niehaus has experience working with clients, ages 4 – 85+, dealing with anything from anxiety, depression, trauma, career, social issues, and other things causing turbulence in their lives. He works with individuals, couples, and families on how they can best function in the world. Depending on the client’s needs, Dr. Niehaus works with clients to create a customized treatment plan best for their needs. Dr. Niehaus believes in a collaborative therapeutic environment that wants clients to have an active voice in their journey.
Educational Background
He holds a bachelor’s in Marketing and Finance from the University of Cincinnati. He holds a Master’s in Business Administration from Northern Kentucky University and a Master’s of Education in Mental Health from the University of the Southwest. He completed his Doctorate in Clinical Psychology (PsyD) in 2021 from California Southern University.
approach to therapy
Dr. Niehaus’s approach to treatment is to help empower the client on their journey. Dr. Niehaus is an integrated therapist, which means he will use different modalities (e.g., psychodynamic, Cognitive-Behavioral Therapy (CBT), solution focus, etc.). Being trained in both business and mental health, Dr. Niehaus can help his clients explore the core problems they are facing and discover the skills within them to approach the change they seek.
