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. We accept cash, check, and credit card payments. We also accept the following insurances: Blue Cross/Blue Shield, Cigna, Harvard Pilgrim, NH Healthy Families, Optum United Behavioral Health, Tufts, United Healthcare, and Well Sense (Beacon Health Strategies).
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 neuropsychological assessment experience includes ADHD, learning disability, autism spectrum disorder, fetal alcohol spectrum disorder, acquired brain injury, and geriatric neuropsychology. In individual and family therapy, I use a positive psychology approach. My goal is to help people feel competent, fulfilled, and able to make the most of life.
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 in an outpatient mental health setting. I’m also a former pediatric and triage nurse. Life is filled with challenges. I find it rewarding to work with individuals and families to find the best way to cope with them. >> 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. 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. | Training Director
I am a New Hampshire Licensed Psychologist specializing in compassionate, comprehensive neuropsychological evaluation for adolescents and adults. I evaluate neurodevelopmental disorders (e.g., Autism Spectrum Disorder, ADHD) and neurocognitive disorders (e.g., Alzheimer’s, Parkinson’s, Lewy Body, Frontotemporal Degeneration, stroke). 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, using your strengths to help 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 Dr. Kat Tolstikova’s supervision, while pursuing licensure in Massachusetts and New York. I am fluent in both English and Spanish. My clinical focus is neuropsychology. I have a particular interest in learning and mental health concerns, traumatic brain injuries, 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
Krystle Magaw, Psy.D.
I am a post-doctoral fellow working under the supervision of Dr. Kat Tolstikova, while pursuing Massachusetts and New Hampshire state licensure. My clinical focus is on providing neuropsychological assessment across the lifespan. >>Read more about Krystle
Ellen Ijebor, PhD
I am a postdoctoral fellow working under the supervision of Dr. Kat Tolstikova while pursuing licensure in the state of Massachusetts. I currently provide neuropsychological evaluations to children, adolescents, and adults presenting with a range of cognitive and emotional concerns with a focus on diagnostic clarification and diagnosing ADHD and Autism. >>Read more about Ellen
Aashi Chhabra, Psy.D.
I am a post-doctoral fellow working under the supervision of Dr. Kat Tolstikova while pursuing licensure in Massachusetts. I received my doctorate in clinical psychology from William James College, where I completed a concentration in Asian Mental Health. I am fluently bilingual in English and Hindi. >>Read more about Aashai
Jagger
Therapy can feel a little lighter when there’s a wagging tail to greet you. Jagger, our beloved office dog, is part of the welcome team here. He may be a little slow to warm up at first, but once he trusts you, his sweet and funny personality shines through.
You’ll often find him waiting at the door to say hello or tucked under the therapy couch, quietly keeping you company. Jagger has a way of making people smile, offering comfort just by being nearby. He’s not just a dog—he’s part of the healing space we’ve created, reminding us that connection, patience, and warmth come in many forms.