Susannah Williams, MD

Dr. Jessica Marz is a board-certified psychiatrist who completed her undergraduate studies at the University of Florida and earned her medical degree from the Florida State University College of Medicine. She went on to complete her psychiatry residency at the University of Florida College of Medicine Jacksonville. Dr. Marz treats adults experiencing a variety of mental health concerns, including anxiety, depression, PTSD, OCD, ADHD, bipolar disorder, and adjustment-related challenges.

Dr. Marz is a compassionate and thoughtful psychiatrist committed to holistic, patient-centered, evidence-based care. She approaches each individual with warmth and without judgment, fostering a therapeutic environment built on open communication and trust. She believes that strong rapport is essential to achieving meaningful progress in treatment.

Dr. Marz combines medication management with supportive psychotherapy, incorporating cognitive-behavioral techniques and motivational interviewing. She customizes each treatment plan to align with the patient’s personal goals and evolving needs, recognizing that healing is a highly individualized journey.

Dr. Kira Posteraro is double board-certified in Adult and Addiction Psychiatry and has over 10 years of clinical experience. She completed her General Adult Psychiatry Residency at Allegheny General Hospital in Pittsburgh, PA, followed by a fellowship in Addiction Psychiatry at Beth Israel Medical Center in New York, NY.

Dr. Posteraro’s career has included serving as Director of Psychiatric Services at an addiction treatment center in Pittsburgh, PA, where she provided care across the full continuum of substance use disorder treatment—including residential, acute PHP, IOP, outpatient, and aftercare services. She later held the role of Section Chief Psychiatrist for the Center for Treatment of Addictive Disorders at VA Pittsburgh Healthcare System, offering both residential and outpatient services and acting as Medical Director for the SAMHSA-certified Opioid Treatment Program. Most recently, she served as Chief of Psychiatry for the Behavioral Health Service Line at VA Pittsburgh, where she had the honor of caring for our nation’s Veterans.

While her clinical expertise centers on the diagnosis and treatment of substance use disorders, Dr. Posteraro also has extensive experience treating a wide range of psychiatric conditions, including depressive and bipolar spectrum disorders, anxiety disorders, and trauma-related disorders.

Dr. Posteraro uses a collaborative, supportive approach to care, incorporating motivational interviewing to help guide patients on their journey to wellness. She integrates holistic strategies alongside medication management and is dedicated to meeting patients where they are in treatment to build individualized, effective recovery plans.

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Dr. Irene Pastis is a board-certified psychiatrist who specializes in adult psychiatry.  She completed residency training at East Carolina University in both internal medicine and psychiatry.  After residency, she pursued her passion in psychiatry and stayed on as a clinical assistant professor in the department of psychiatry at East Carolina University.  In this role she specialized in treating adults with mental illness in both the inpatient and outpatient settings.  She has spent a considerable amount of time teaching residents and medical students and has published several papers focusing on the neuroscience pathways of mental health conditions.  In her daily practice, Dr. Pastis focuses on evidence-based treatments utilizing the latest clinical guidelines and current approved treatments.  In addition to medication management, she also incorporates psychotherapy in the treatment of mental health conditions.  Dr. Pastis is passionate about taking a collaborative approach with her patients to help them reach their potential.

Jessica Fairchilds is a board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP) with over 8 years of experience in many psychiatric settings and populations. She earned her Master of Science in Nursing from the University of Mississippi Medical Center and is passionate about providing high quality, comprehensive mental health services. Jessica prides herself in her patient-centered approach by fostering strong provider-patient relationships to achieve optimal treatment outcomes. In her free time, Jessica enjoys spending time with her husband and young daughters, traveling the globe, or getting lost in a historical fiction novel.

Jessica is highly focused on building a strong therapeutic relationship with her clients while making them feel heard and validated. She strives to provide the highest level of care while exploring different treatment options to find what works best for each individual.

Jessica will focus on learning about the client as an individual and learning the concerns of the client while working to develop an individualized treatment plan. She uses her extensive knowledge of medications and therapy techniques to guide treatment options for the best outcomes.

Dr. Laura Mayol is double-boarded in child and adolescent psychiatry and adult psychiatry. She has been practicing for over 12 years. Dr. Mayol practice focuses on medication management, which is offered in conjunction with supportive therapy offered in 30 min visit follow-up visits. However occasionally Dr. Mayolmay believe additional therapy is needed and ask you to bring a therapist into your care team to provide the best outcome.

Dr. Mayol received her medical degree from the University of Puerto Rico School of Medicine in San Juan, Puerto Rico. She completed her residency in adult psychiatry at Jackson Memorial Hospital in Miami, FL. She pursued her fellowship in child and adolescent psychiatry at the University of Florida, in Gainesville. After completing training, Dr. Mayol worked with children and adult in a variety settings including Community Mental Health Centers and hospitals, providing both inpatient and outpatient services.

Dr. Mayol then became a Clinical Assistant Professor for the University of Florida Department of Psychiatry and provided clinical services for UF Student Mental Health at the Counseling and Wellness Center. While treating a wide variety of patients, her clinical focus has been on treating adolescents and young adults with mood and anxiety disorders

Bryce Thacker grew up in a rural community, where he learned the value of helping others achieve their best selves to support overall community health and well-being. With a passion for helping people live their best lives, he earned his undergraduate degree in biology from the University of Nebraska and completed his nursing education at Creighton University. He went on to earn a Master of Science in Nursing, specializing as a Family Nurse Practitioner and in Community Health, from Creighton University, and later completed a nursing practice degree at the University of Colorado with a focus on population and community health. He also holds a post-graduate certification in psychiatric mental health from Washburn University.

Bryce practiced family medicine for 18 years before transitioning to psychiatric mental health in 2022. His background in both physical and mental health gives him a holistic perspective on care. Since shifting his focus, he has helped individuals improve their quality of life through medication management for mood disorders, PTSD, anxiety, ADHD, and other mental health conditions. He continues to live in a rural community with his family and remains committed to helping people become their best selves.

Bryce believes that each person’s “best self” is unique and that mental health care should meet individuals where they are. He emphasizes a collaborative, client-centered approach, always keeping the individual’s goals at the heart of care. He is dedicated to helping clients identify and overcome the symptoms and stressors that interfere with their well-being, and he works to dismantle limiting beliefs or labels that may have been placed on them.

By taking the time to understand each person’s challenges and aspirations, Bryce helps clients find sustainable, holistic paths to wellness. His care is grounded in empathy, respect, and a deep commitment to supporting each person’s journey toward a fulfilling and balanced life.

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