Meet the Team

Meet the Team

Cassandra White

Cassandra has been the owner and Director of RMPS since 2013. She brings more than 20 years of experience in working with children and families to the practice. Her background and expertise in the areas of assessment and treatment of Autism Spectrum Disorders and ADHD as well as her knowledge of neurofeedback therapy and play therapy give her the broad base of knowledge to direct this multi-faceted private psychology practice.

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In addition to her experience in assessment and treatment of learning disabilities and giftedness, Cassandra has training and expertise in Child Psychotherapy and Play Therapy. She has worked extensively with children and their families regarding treatment of anxiety, depression, behavioral issues and emotion regulation using play-based and expressive interventions. Cassandra is also a clinical supervisor who provides supervision and consultation to other practitioners specializing in working with children.

Cassandra’s experience and knowledge is not only academic; she is the mother of four children. Her experience of being a parent of four children makes her a very practical and realistic therapist. She understands the demands of parenting and does not rely on “book knowledge” or recommendations that appear unattainable for parents. She prides herself in understanding both the needs of the parents and the child. She looks for ways to enhance family functioning so that parents can feel competent and successful in their difficult jobs of raising children with a variety of complex needs.

Helena Morris

Helena Morris is a Registered Psychologist with the College of Alberta Psychologists. Helena holds a Master’s in Counselling from the University of Victoria, and she specializes in providing counselling and psychotherapy to children, youth and families who are facing various challenges and mental health concerns.

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Helena has worked with children and their families for about 10 years. She draws from narrative and cognitive behavioural therapy approaches and utilizes sensory exploration, grounding and mindfulness during sessions. She works within an attachment-based and trauma-informed lens to help young people build resilience and emotional regulation.

Helena has experience working with a wide range of presenting issues including anxiety and depression, Attention Deficit Hyperactivity Disorder (ADHD), Autism Spectrum Disorder, addictions, trauma and behavioural concerns. She also has training and experience in suicide intervention and prevention and non-suicidal self-injury. Helena has worked within a variety of settings including crisis residential programs, schools and mental health centres.

Harleen Toor

Harleen is a Provisional Psychologist with the College of Alberta Psychologists and a member of the Psychologists’ Association of Alberta. Harleen has completed her Bachelor of Arts in Sociology and Psychology at Mount Royal University and a Master of Counselling through City University. She specializes in both counselling and psychoeducational assessment services.

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Harleen has spent almost eight years working alongside children, adolescents, and their families in a variety of settings. These include school, in-home support, residential programs, in early-intervention programs, and non-profits. She has experience working from a trauma-informed lens, and in a range of diagnosis such as but not limited to the following: Autism Spectrum Disorder (ASD), ADHD, Global Developmental Delay (GDD), Fetal Alcohol Spectrum (FASD), Generalized Anxiety Disorder (GAD). She also has experience supporting children and adolescents in emotional regulation, strengthening interpersonal relationships and developing coping strategies. Harleen works from an integrated approach, pulling from different areas of psychology to best fit the youth.

Harleen is passionate about helping families and children enhance their family functioning by setting achievable and sustainable goals. She also believes that each child, adolescent, and family is unique, and that therapy should be curated as such.

Kellie Lanktree

Kellie has completed a Bachelor of Child and Youth Care with the University of Victoria and a Master of Education in Counselling Psychology through the University of Lethbridge. She is a Registered Provisional Psychologist with the College of Alberta Psychologists. Kellie has over 13 years experience supporting children and youth with developmental disorders/delays.

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Kellie has over 13 years experience supporting children and youth with developmental disorders/delays and their families. Kellie has experience working in schools, clinical settings, and within homes to provide support and therapeutic interventions. Through her time at RMPS, Kellie has also gained experience in helping individuals affected by trauma, grief/loss, separations, emotional regulation, and anxiety. Kellie practices through a developmental and attachment/trauma focused lens, and draws up a variety of play-based approaches such as Child-centered play therapy, DIR/Floortime, Art-based mediums, and Mindfulness-based practices. Kellie has also recently begun offering Neurofeedback therapy, and is working on receiving her certification through BCIA. Kellie believes in meeting children where they are at and that there is no “one size fits all” for therapy.

Sanchia Bignell

Sanchia is a Registered Provisional Psychologist with the College of Alberta Psychologists. She completed her undergraduate degree in psychology at the University of Witwatersrand in South Africa, and her Master of Science, specializing in School and Applied Child Psychology, at the University of Calgary.

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Sanchia has experience conducting psychoeducational assessments with children and adolescents with social-emotional, learning, and cognitive challenges in both a clinic and school setting. She also has experience facilitating and co-facilitating small groups. Having worked with children and adolescents with diverse backgrounds, as well as having lived in many countries, Sanchia strives to work with culturally diverse families from a place of cultural awareness and sensitivity. Sanchia is caring and passionate about working with children and adolescents. She adopts a strengths-based perspective in her approach to supporting her clients.

Crystal Popke

Crystal is a Registered Psychologist with the College of Alberta Psychologists and a member of the Psychologists’ Association of Alberta. Crystal has completed a Bachelor of Biological Sciences and a Bachelor of Religious Studies with the University of Calgary and a Master of Arts in Counselling Psychology through Yorkville University.

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Crystal is experienced in supporting children, adolescents, and their families who are dealing with concerns related to anxiety, depression, emotion regulation, interpersonal conflict and self-esteem and identity. In addition, Crystal has a strong clinical interest in attachment and trauma-based interventions and modalities. Crystal has built her practice around strengths-based, integrative modalities and draws on child-centered play therapies, expressive arts therapies, cognitive-behavioural techniques, mindfulness practices and Theraplay®️. Crystal is passionate about supporting and empowering children and adolescents in overcoming obstacles and discovering their full potential!

Joanna Piekarski

Joanna has completed her undergraduate degree in psychology at York University and her Masters of Education specializing in developmental psychology at the University of Toronto. Joanna has over 10 years of experience supporting children and families with Autism Spectrum Disorders, ADHD, trauma, grief and loss, anxiety, and behavioural challenges in both school and agency settings, and is a Registered Psychologist.

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She recently completed a post-graduate fellowship in infant-parent mental health through the University of Massachusetts Boston where her interests included attachment-based interventions, early brain science, and trauma-informed practice. She is also a member of the Canadian Association for Play Therapy. Joanna utilizes both directive and non-directive forms of play therapy with children and families. She believes that the parent-child dyad is a crucial part of the healing process and will often include the caregivers in therapy using Theraplay-informed activities, filial play therapy or video feedback intervention. She is enthusiastic, fun, and passionate about creating a safe space for children and families to overcome challenges and to reach their full potential.

Fiona Donovan

Fiona Donovan is one of the friendly voices you hear when you call RMPS. She has more than 25 years of experience as an Administrative Assistant and Office Administrator. Fiona is passionate about serving our clients and will always go the extra mile to put a smile on your face.

Shamir Ladhani

Shamir joined Rocky Mountain Psychological Services (RMPS) in 2018 as a Business Consultant and is currently serving as Senior Business Consultant. Being an engineer, he gets excited about evidence-based technologies applied at RMPS to help individuals improve self-regulation, manage ADHD symptoms and enhance their abilities to function at their peak in personal and professional settings. Being a father, he is passionate about serving families, especially children whose mental well-being is paramount to our society’s future.

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Shamir is a former Vice-President of a Calgary-based Fortune 500 engineering company. After achieving standing as a HeartMath(R) Certified Trainer and HeartMath(R) Certified Coach, he was invited to speak on local, national and international stages featuring notable authors and speakers in Italy, Germany, Czech Republic, Mexico and the United States. He is a proud father of two daughters, a supporter of the Calgary Distress Centre, an award-winning stage actor, business growth consultant and a leadership coach and trainer.


Denise Riewe

Denise has completed a Bachelor of Health Sciences through the University of Lethbridge and a Master of Counselling with Athabasca University. She is a Registered Provisional Psychologist with the College of Alberta Psychologists and a member of the Psychological Association of Alberta.

Denise has over 9 years of experience supporting children, youth and their families in both residential and community-based practices. Denise is experienced in working with high and at-risk youth, supporting children and their families with strength-based approaches.

She practices from a client-center approach supported by Cognitive Behaviour Therapy, Dialectical Behaviour Therapy, Theraplay, and other play and art-based modalities.

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