Who We Are
Experts in Evidence-Based Therapy for Adults & Teens
At Catalyst, our mission is to support you in overcoming anxiety, stress, insomnia, and challenges with focus and intense emotions to foster your success and happiness.
Serving adults and adolescents in Massachusetts, we provide compassionate, personalized care using evidence-based cognitive-behavioral therapy (CBT). Our goal is to empower you to achieve lasting excellence, improved mental health, and resilience in the face of life’s challenges—now and in the future.
Catalyst Psychology's Philosophy of Care
Our goal isn’t just symptom relief — “it’s to support lasting change. We help you align your daily habits with your long-term goals so you can thrive now and in the future.
You don’t have to choose between science and warmth. We use gold-standard therapies like CBT, CBT-I, ACT, and ERP with empathy and personalization at every step.
We go beyond talk in our sessions, we include new learning and practicing new approaches that help overcome persistent problems. Our sessions are active, focused, and tailored to your goals. Most clients benefit from a course of 15–30 sessions—with tools to carry forward.
We work with goal-oriented adults and driven adolescents, offering support to the families and caregivers who walk alongside them. Whether you’re navigating burnout or helping your teen manage anxiety or ADHD, we provide structured, personalized care to help you move forward with clarity and confidence.
Dr. Jessica Weatherford
Catalyst was founded by Dr. Jessica Weatherford, a clinical psychologist with advanced training in evidence-based treatments and a deep belief in the power of structured, personalized care. Her approach integrates cognitive-behavioral therapy with the latest in neuroscience and behavioral science to help clients reduce distress and achieve their goals.
Dr. Weatherford earned her doctorate from Rutgers University, where she also completed specialized training in working with adolescents, and completed both her predoctoral internship and postdoctoral residency through the VA Healthcare System. With deep experience treating complex mental health challenges in outpatient, primary care, and inpatient settings, Dr. Weatherford is committed to providing structured, personalized therapy rooted in the science of how people think, feel, and change.
In addition to her clinical expertise, Dr. Weatherford brings a unique perspective shaped by her experience as an executive and her MBA training. This combination allows her to support both teens and adults—including high-performing professionals—who are navigating stress, burnout, and leadership or life transitions. She specializes in treating anxiety, OCD, insomnia, ADHD, and trauma, using cognitive behavioral therapy (CBT) integrated with the latest insights from neuroscience and behavioral science to help clients gain clarity, restore resilience, and move forward with purpose and confidence.
Areas of Expertise
Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), Exposure and Response Prevention (ERP), Dialectical Behavior Therapy (DBT), Cognitive Processing Therapy (CPT), Prolonged Exposure Therapy (PE), mindfulness and biofeedback.
Dr. Olivier Barthelemy
Dr. Olivier Barthelemy (“Dr. Ollie”) is a licensed clinical psychologist who helps adults and adolescents navigate anxiety, obsessive-compulsive disorder (OCD), depression, trauma, and life transitions. Many clients come to him feeling overwhelmed by worry, self-doubt, or repetitive thought patterns that are hard to break. Dr. Barthelemy offers a structured and compassionate space to make sense of these experiences, reduce distress, and build practical tools for long-term change.
Dr. Barthelemy specializes in evidence-based treatment of anxiety disorders and OCD. Specifically, he uses a flexible, skills-based approach that includes cognitive behavioral therapy (CBT) approaches such as the Unified Protocol and exposure and response prevention (ERP). In doing so, he helps clients manage strong emotions and shift unhelpful patterns. His clinical training at Boston University’s Center for Anxiety & Related Disorders (CARD) and the Edith Nourse Rogers Memorial VA Medical Center (clinical internship) emphasized individualized, goal-oriented therapy rooted in collaboration and respect. Known for his calm and transparent style, he helps clients understand their symptoms, develop resilience, and regain confidence in daily life.
In addition to his clinical expertise, Dr. Barthelemy brings a strong background in neuropsychology, having trained at the VA Boston Healthcare System, Brigham and Women’s Hospital, and Easterseals Capital Region & Eastern Connecticut (clinical fellowship). This foundation deepens his understanding of how the brain and behavior interact, informing his approach to both therapy and assessment. Drawing on science and compassion, he is committed to helping clients restore balance, strengthen resilience, and move forward with clarity and purpose.
Neal Bottom, M.Ed., MS
Neal Bottom, M.Ed., MS, is Catalyst Psychology’s Director of Client Services and an expert in executive-function and social-emotional development for everyone from ambitious teens to goal-oriented adults. Over a decade in school education, he has launched peer-mediation programs, delivered conflict-resolution training, and designed individualized plans that sharpen focus, resilience, and performance. Neal holds an M.Ed. in School Counseling from Rutgers and an MS in Human Resources & Organizational Development from Chapman University, along with training in Collaborative Problem Solving from Massachusetts General Hospital—giving him a rare blend of behavioral insight and operational know-how that translates smoothly to both academic and professional arenas.
As the first point of contact at Catalyst, Neal guides new clients through a clear, efficient consultation and onboarding process. He fields inquiries, coordinates schedules, and handles insurance logistics while collaborating closely with our clinicians to ensure each client’s goals are accurately captured from day one. Neal’s warm, solutions-focused style helps busy professionals and families feel at ease, making it easier for them to take that important first step toward care.