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Our Team

Registered Psychologists – Toronto, York Region

York Region Psychological Services is committed to choosing the right experienced psychologist to work with each individual patient and resolve their issues. With that as our guiding philosophy, we at YPRS have assembled a team of highly qualified, experienced and dedicated team of Richmond Hill, Thornhill and Toronto based psychologists.

All of our team members are highly regarded specialists with extensive experience in their chosen field. Together, they have been providing reliable, comprehensive and accessible assessment, counseling and treatment for their patients.

Dr. Hannah Rockman, PsyD

Clinical Psychologist

Founder and principal of YRPS, Dr. Rockman has been practicing for over 20 years. She specializes in PTSD, Depression, Anxiety disorders, ADHD, psycho-educational and gifted assessments for individuals. She speaks English and Hebrew.

Kathy Aitken, M.A.

Clinical Psychologist

A certified member of the College of Psychologists, Ms. Aitken has more than 20 years of experience. She specializes in assessment, diagnosis and treatment of psychological disorders in adults and the elderly.

Anna Prudovski, M.A.

Psych Associate

As a certified member of the College of Psychologists of Ontario, Anna Prudovski is duly qualified to practice Clinical Psychology and perform psychological assessments and treatment of a wide range of mental health problems. Ms. Prudovski is a Diplomate of Academy of Cognitive Therapy (ACT) and a Certified Member of Canadian Association of Cognitive and Behavioural Therapists (CACBT). 

Corry Barkhuis, M.A.


Corry completed the coursework for a Doctorate in Clinical Psychology at the Adler School of Professional Psychology in Chicago along with an assessment and a therapy practicum.

Dr. Hart Brasche, PhD


A certified member of the Association of Consultants, Counselors, Psychometrists and Psychotherapists, Dr. Brasche has more than 15 years of experience in psycho-education, psychotherapy and conducting psychological assessments and treatment for PTSD, Depression, Anxiety disorders.

Aneta Chencinski, M.Ed.


A specialist in counselling adolescents and their families, parents of hard to managed children and youth and coaching students affected by ADHD. Ms. Chencinski is fluent in English, Hebrew and Polish.

Natalie Cournoyea, M.A.


A specialist in counselling and psychotherapy, she has over 35 years experience in health care, in both the acute care hospital sector, rehabilitation, and government. In her various roles in the patient services areas, she prides herself on her ability to coach and mentor individuals in their clinical decision making, conflict resolution and communication within their professional interpersonal relationships.

Anne Dhir, PhD


With various bachelor, masters and PhD degrees in many branches of education and psychology, Dr. Dhir specializes in trauma, stress management and relaxation techniques. As a Eurasian, in addition to English she fluently speaks languages of the South Asian sub-continent including Hindi, Urdu and Punjabi.

Lori Dyni, PhD

Children School Psychologist

A member of the College of Psychologists, Dr. Dyni has been providing psychological assessment to students with learning, behavioral and socio-emotional needs for over 15 years. She specializes in school psychology.

Tara Looby, M.A., M.Sc.


A certified member of the Association of Consultants, Counselors, Psychometrists and Psychotherapists, Ms. Looby specializes in transformation psychotherapy, holistic healing and trauma.

J. Roberto Nascimento, M.A.

Psychotherapist, Art Therapist

With over 20 years of experience in psychotherapy, Mr. Nascimento is a specialist in therapy through games and art therapy. Mr. Nascimento is fluent in English and Portuguese.

Else Silva, M.A.


A certified member of the Canadian Counseling and Psychotherapy Association, Mr. Silva specializes in the treatment of adults who suffer from PTSD, Depression, Anxiety disorders, work related stress and pain.

Reina Zatylny, MSW, RSW


A registered clinical social worker and member of the College of Social Workers, Ms. Zatylny specializes in the treatment of issues involving trauma, grief and bereavement, relationships, infertility, sexual assault and motor vehicle accidents.

Andrei Kozlowski

Registered Psychological Associate

A registered Psychological Associate with the College of Psychologists of Ontario, Mr. Kozlowski specializes in depression, anxiety disorders, and post traumatic stress disorder.

Hala Zahreddine, M.C., C.C.C.


A certified member of the Canadian Counseling and Psychotherapy Association, Ms. Zahreddine specializes in psychotherapy for adults and adolescents who are seeking guidance in the process of healing, coping, growth and self-discovery. She addresses issues including PTSD, Depression, Anxiety, pain and addiction disorders. Hala speaks English and Arabic.

Rebecca Hodson,

Fertility/Infertility Counsellor and Educator

HIPPS was conceived after a personal experience with infertility. Rebecca has passion, empathy and the ability to uniquely counsel those struggling with infertility. She has a desire to educate professionals in the fertility industry as a partner to improve the quality of life for patients in treatment as well as increase pregnancy rates.

Marek J. Celinski

He is affiliated with the Ontario, Canadian and American Psychological Associations, with the Canadian Register of Health Services Providers in Psychology and with the Canadian Academy of Psychologists in Disability Assessment.

Anna B. Wolanczyk

A trained and experienced psychotherapist and counselor with a well established experience in individual and couple psychotherapy and counselling. During the past 15 years she has worked in a variety of institutional settings including therapeutical communities, educational and business institutions.

Vaishnavi Nadesu


I am a member of the Ontario Psychological Association (OPA), and am working towards getting registered with the Ontario College of Registered Psychotherapists and Registered Mental Health Therapists.

Patricia Davies


Patricia is a graduate addictions counsellor, a certified member of the Ontario Association of Consultants, Counsellors, Psychometrists and Psychotherapists (OACCPP), an Internationally Certified Drug and Alcohol Counsellor, a Certified Problem Gambling Counsellor with the Canadian Problem Gambling Certification Board and a Certificate in Trauma Counselling.

Melanie Craig

Registered Social Worker licensed by OCSWSSW with experience in diverse interdisciplinary settings including hospitals, corporations and community health centres throughout Canada and the US.

Phyllis Ng M.A., C.C.C.

Counsellor / Psychotherapist

Ms. Ng is a Canadian Certified Counsellor (CCC) and a member of Ontario Association of Consultants, Counsellors, Psychometrists, and Psychotherapists OACCPP. 

Melinda Van Halteren, M.Div.

Melinda has been counselling individuals, couples, and families for over 15 years.   Through her caring and empathic approach, clients benefit from her ability to assist them when they are dealing with complications arising from traumatic and life changing events. 

Gui Mansilla


Psychotherapist and Coach he has been running a successful private practice working with individuals, groups and couples in Toronto for over 10 years. A seasoned professional Gui has over 10,000 hours of client experience.