Addiction therapists & psychiatrists in St. Louis, MO

I am Stephen O’Neill, LSCSW, MBA, a licensed clinical social worker with over two decades of experience in behavioral and mental health. I specialize in evidence-based approaches to help clients navigate life’s challenges, improve relationships, and achieve personal growth. I am passionate about whole-person care, integrating mental health, well-being, and practical solutions tailored to each client’s needs. I believe in fostering a safe, supportive, and nonjudgmental space where clients can explore their concerns and develop meaningful change. I will see you, I will hear you, and I will walk alongside you. My approach is grounded in collaboration, empowerment, and respect for each person’s unique journey. In my free time, I enjoy hiking, biking, canoeing, playing video games, tabletop gaming, and cars.

With over 12 years of experience in mental health counseling, workplace wellness, and integrated primary care behavioral health, my life’s purpose is to help people find wholeness. I’m passionate about offering compassionate support to individuals and couples as they navigate life’s challenges, ensuring they feel heard, valued, and empowered to grow.

Throughout my career, I’ve worked in a variety of settings—including hospitals, outpatient programs, and corporate environments—where I’ve built meaningful relationships with clients while managing high caseloads. Whether providing short-term counseling, coaching clients through transitions, or supporting employees in enhancing their well-being, I am deeply committed to fostering an environment where individuals can address their challenges with understanding and care.

A particular area of focus for me is helping couples strengthen their relationships. I find great fulfillment in guiding them through communication issues, conflicts, and life stressors. I believe strong, healthy relationships are key to overall well-being, and I’m passionate about helping couples build lasting, supportive connections.

I also work with individuals dealing with a range of issues like depression, anxiety, family challenges, and work-related stress, always aiming to help them find balance and self-discovery. Additionally, I have contributed to wellness programs and telehealth services, equipping individuals and leaders with tools to thrive both personally and professionally.

I am dedicated to continuous growth, which is why I’ve pursued additional training in areas like Primary Care Behavioral Health and telehealth technology. This allows me to stay adaptable and ensure the care I provide remains effective and relevant.

In every aspect of my career, I strive to create a safe, open, and understanding space for people to explore their challenges and feel supported on their journey toward wholeness.

Larissa Theison is a licensed clinician with over 15 years of experience helping individuals navigate life's challenges. Trained in EMDR, DBT, and person-centered services, she specializes in supporting clients facing many struggles. Larissa is passionate about empowering people to find relief from pain and build more fulfilling lives.

With over 20 years of experience in the field of mental health, I am dedicated to supporting professionals in the helping profession as they navigate the complexities of their careers. My background includes 13 years of counseling and 17 years in outpatient community mental health, working with individuals with severe and persistent mental illness. With a Bachelor of Arts in Social Psychology from Park College and a Master of Arts in Counseling from Webster University, I am equipped with the academic foundation and practical experience to guide you effectively. Whether it's stress management, career guidance, or mental health support, you can trust that you are in capable hands.

I am a Licensed Professional Counselor in Missouri with over three years of experience helping individuals navigate and process traumatic events. I am passionate about supporting clients in growing and excelling amid life's challenges. I want everyone to grow and become a healthier, more balanced version of themselves.

That I intend to fully invest myself in helping them

***Same day appointments may be available****

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