Katalyst Psychological Family Center

Dr. Katerina (Kat) Tolstikova and her professional associates provide mental health services for children, adolescents, and adults. Services are by appointment only. In addition to cash, check, and credit card payments, the following insurances are accepted: Blue Cross/Blue Shield, Cigna, Harvard Pilgrim, NH Healthy Families, Optum United Behavioral Health, Tufts, United Healthcare, and Well Sense (Beacon Health Strategies).

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Katerina Tolstikova, PhD

I am a New Hampshire and Massachusetts Licensed Psychologist with a special interest in neuropsychological evaluation and psychological therapy. I have almost 30 years of professional experience from across the globe, from Russia to Canada to the US. My experience in neuropsychological assessment issues includes ADHD, learning disability, autism spectrum disorder, fetal alcohol spectrum disorder, acquired brain injury, and geriatric neuropsychology assessments. In individual and family therapy, I use a positive psychology approach to help people feel competent, fulfilled, and to make life most worth living.

Linda E. Powers, LCMHC, RN

I am a licensed clinical mental health counselor (LCMHC) in NH. I have many years of experience working with children, adolescents, and families, both in an outpatient mental health setting, and as a former pediatric and triage nurse. Life is filled with challenges throughout our journey of life, and working with individuals and families to find the best way to cope with these challenges is rewarding to me. >> Read more about Linda

Divina Girouard MS, LCMHC, MLDAC

Balance is one of the key components in our life. No matter how chaotic life can be, we strive to keep ourselves grounded but during challenging times that can be tough to do. My passion is to help you work through your challenges so that you can accomplish your goals in life. I provide a compassionate, engaging, warm, and non-judgmental space.

Divina is a New Hampshire Licensed Clinical Mental Health Counselor and Master Licensed Drug and Alcohol Counselor. >>Read more about Divina

Sandra Ackerman Psy. D.

I am a New Hampshire Licensed Psychologist specializing in compassionate and comprehensive neuropsychological evaluation for both neurodevelopmental disorders (i.e., Autism Spectrum Disorder and ADHD) and neurocognitive disorders (i.e., Alzheimer’s, Parkinson’s, Lewy Body, Frontotemporal Degeneration, stroke) in adolescents and adults. I utilize informed, data-driven case conceptualizations and provide practical recommendations that are relevant in school, medical, and/or home environments. >>Read more about Sandra

Bonnie Barlow, PhD

I am a licensed psychologist and psychotherapist. I treat every person as a unique individual and tailor treatment to your needs by using your strengths and helping you improve areas of weakness. I also consider your preferences in style of therapy. I am grounded in Jungian Informed Psychodynamic Psychotherapy, which emphasizes the development of the whole person as a means to wellness. Since I tailor therapy to each person’s needs and strengths, therapy can be different for different people. >>Read more about Bonnie

Tawnie Arnold, Psy.D.

I am a post-doctoral fellow, working under the supervision of Dr. Kat Tolstikova, while pursuing licensure in the states of New Hampshire and Massachusetts. My clinical focuses are neuropsychological evaluations across the lifespan and adult psychotherapy. >>Read more about Tawnie

Meghan Deneen, Psy.D.

I received my doctorate in clinical psychology from William James College in Newton Massachusetts, with a concentration in Children and Families of Adversity and Resilience. Before joining the Katalyst team, I worked with Boston Public Schools for several years, providing therapy and support to students, families, and educators. >>Read more about Meghan

Brooke Dumont, LCMHC

I am a Licensed Clinical Mental Health Counselor with experience supporting a wide range of clients, including those navigating anxiety, depression, ADHD, autism, intellectual disabilities, and life transitions. >>Read more about Brooke

Matthew Hillyard, Psy.D.

I am a post-doctoral fellow working under the supervision of Dr. Kat Tolstikova while pursuing licensure in the state of New Hampshire. >>Read more about Matthew

Danisha Baró, Ph.D.

I am a post-doctoral fellow working under the supervision of Dr. Kat Tolstikova while pursuing licensure in the states of Massachusetts and New York. I am fluent in both English and Spanish. My clinical focus is on neuropsychology, with particular interest in learning and mental health concerns, traumatic brain injuries, Chronic Traumatic Encephalopathy (CTE), and memory- related conditions. >>Read more about Danisha

Cristina Cruz-Thompson, M.S.

I am a Pre-Licensed Masters level Clinician working under the supervision of Divina Girouard MS, LCMHC, MLDAC. I have a master’s in counseling psychology from Carlos Albizu University in San Juan, P.R. >>Read more about Cristina

Edward Hu, M.S.

I am a pre-licensed clinician, working under supervision of Divina Girouard, LCMHC, MLDAC. I approach therapy as a space for thoughtfulness, inquiry, and growth. I hold a master’s degree in Clinical Mental Health Counseling from Boston College. >>Read more about Edward