Meet The Team

Amanda Stoner

Cassandra White

Christopher McGregor

Denise Riewe

Emma Donnelly

Fernanda Plaisant

Gabriela Barros

MacKenzie Ebel

Raquel Freitas

Tammy Thomson

For over 25 years, Rocky Mountain Psychological Services (RMPS) has been a trusted provider of psychology services in Alberta. We’re so excited to widen our scope to invite more adults and professionals in psychology to engage with us. As always, our goal is to help the people in the present, knowing that the work we do now will create an impact for generations to come.
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MacKenzie Ebel

MacKenzie is a Registered Provisional Psychologist with the College of Alberta Psychologists. She holds a Bachelor of Arts in Psychology from Princeton University, where she was also a member of the women’s ice hockey team for four years. After graduating, MacKenzie returned to Calgary to earn her Master’s in Counselling from the City University of Seattle. With experience working with children, youth, and families, MacKenzie has provided support in various settings, including coaching, group homes, and working as a behavioural aid through FSCD contracts. She has specialized training in Neurofeedback, strengths-based ADHD interventions, and Play Therapy. At RMPS, MacKenzie offers a range of services, including counselling, neurofeedback, and formal assessments, including psychoeducational, social-emotional, and behavioural evaluations. She also offers assessments for Giftedness, ADHD, Anxiety, and Learning Disorders, helping clients better understand their unique strengths and challenges. MacKenzie’s background in competitive sports informs her belief in the value of play and organized sports as powerful tools for teaching healthy coping strategies and life skills.

Tammy Thomson

Tammy is a graduate of the Master of Arts in Counselling Psychology (MACP) program at Yorkville University, and is a Registered Canadian Art Therapist and Canadian Certified Counsellor (CCC). She is also a professional art therapist trained at the master’s level in art therapy and member of the Canadian Art Therapy Association. She brings more than 20 years of experience working with children, teens, and families in child development settings, children’s hospitals, and schools as an early childhood educator and elementary teacher. She completed a Bachelor of Applied Science specializing in Child Development Studies at the University of Guelph, Ontario and holds a Graduate Diploma of Teaching and Learning from the University of Canterbury in Christchurch, New Zealand. Tammy is a member of the Canadian Counsellor and Psychotherapy Association and College of Alberta Psychologists while pursuing her next goal of registration as a provisional psychologist. Within the past year, Tammy has completed training in Play Therapy. Tammy values a client-centered approach using play therapy and the expressive arts to support those who may find it difficult to articulate their thoughts and feelings with words. She weaves her training with child and youth cognitive behavioural therapy (CBT) and executive functioning skills into her expressive arts practice. Children and families do not need any skill or prior art experience and the art studio is a safe place where children can gain a sense of independence, greater emotional regulation, and confidence through self-exploration. Expressive interventions in art therapy can treat behavioural issues, anxiety, depression, ADHD, autism, learning disabilities, physical and developmental disabilities, and attachment difficulties. As a parent of three young children herself, Tammy understands the complexities of family life using compassion to help parents feel more confident in their role of raising a successful family.

Raquel Freitas

Raquel is an Office Administrator at RMPS. Back in Brazil, her home country, she graduated as a Psychologist and worked as a clinician for the past 5 years. Although she loved working with children and adults, she discovered a new passion: manage the administrative tasks that keep the business running. As someone who is passionate about learning new things and developing new skills, with the career transition also came the decision to live abroad and explore a new culture. To serve empathetically and connect with people is Raquel’s main personal and professional goal.

Emma Donnelly

Emma is a Registered Psychologist with the College of Alberta Psychologists. She completed her Bachelor of Arts in Psychology in her hometown at Brandon University, after which she moved to Calgary to earn her Master’s of Science in School and Applied Child Psychology at the University of Calgary. Emma provides both assessment and counselling services at RMPS. Emma has a passion for working with children and families and has experience doing so in a number of settings, including schools, homes, early intervention programs, and within the community. She specializes in assessment, including psychoeduational, social-emotional-behavioural, ADHD, gifted, and autism assessments, as well as in counselling. Emma uses a client centred approach to counselling, supported by cognitive behavioural therapy, as well as play-based, expressive, and attachment-based techniques. Within the past few years, Emma has completed training in Cognitive Behavioural Therapy for Children and Adolescents, as well as Play Therapy Training. Emma specializes in working with children and youth and understands the benefit of parent-involvement in therapy, when appropriate, to support successful treatment. Emma believes in meeting clients where they are at and prides herself in working together with her clients to achieve their goals, improve their overall well-being, and enjoy their daily life.

Amanda Stoner

Amanda is a Registered Psychologist with the College of Alberta Psychologists. Amanda earned her doctoral degree in Psychology at Brock University in Ontario in 2017, with a specialization in developmental psychology. Amanda provides formal assessment services at RMPS. Since 2009, Amanda has received formal training and work experience in private practice settings in conducting psycho-educational assessments for students ranging from preschool through university. Amanda is skilled at test administration, interpretation of data, and report writing for various referral questions including ADHD, Learning Disorders, Autism Spectrum Disorder, Anxiety, Giftedness, and Intellectual Disabilities. Amanda enjoys working with people of all ages from diverse backgrounds, and she tries to make the testing environment feel relaxed and comfortable while maintaining integrity in testing protocol.

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 11 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 strength based, client-centered approach supported by Cognitive Behaviour Therapy, Dialectical Behaviour Therapy, Theraplay. She has completed Theraplay Level 1 and Synergetic Play Therapy – Level 1.

Kellie Lanktree

Kellie is a Registered Psychologist with the College of Alberta Psychologists. She 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. Kellie has over 10 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 dysregulation, depression, and anxiety. Kellie practices through developmental, attachment-based and trauma-informed lenses, and draws from a variety of play-based approaches such as Synergetic Play Therapy, Child-centered play therapy, DIR/Floortime, art-based mediums, and mindfulness-based practices. Kellie also provides Neurofeedback therapy, and is working on receiving her certification through BCIA. Kellie believes in meeting children and their families where they are at and that there is no “one size fits all” for therapy.

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. 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.

Gabriela Barros

Gabriela is the Office Manager at RMPS. She began her career as a lawyer in Brazil, so she brings over five years of legal experience to her work. Since relocating to Canada, Gabriela has transitioned into the administrative field, where she continues to thrive. Passionate about professional growth, she is dedicated to expanding her knowledge and consistently approaches her work with a commitment to excellence and a focus on serving others with kindness.

Fernanda Plaisant

Fernanda is a dedicated Administrative Assistant and Intake Coordinator at RMPS, bringing a unique perspective from her background as a pharmacist in Brazil, where she practiced for over three years. Her experience in the pharmaceutical field enhanced her ability to support clients and collaborate effectively with the team. Fernanda’s primary aim is to create a welcoming experience for clients and offer them assistance with kindness and empathy.

Christopher McGregor

Chris is a Registered Provisional Psychologist with the College of Alberta Psychologists. He completed his Bachelor of Arts in Behavioural Sciences at Ambrose University where he discovered his passion for psychology and the stories that children and adults live each day. He recently completed his Master’s of Education in School and Applied Child Psychology at the University of Calgary. Chris provides both formal assessment and counselling services at RMPS. Chris has over 9 years of experience working work children, youth, and their families in educational, residential, and community-based settings. He specializes in assessment, including psychoeducational, social-emotional-behavioural, and ADHD assessment. In his practise Chris utilizes a strength-based approach and is interested in Narrative Therapy, Dialectical Behavioural Therapy, as well as mindfulness and play-based techniques. Chris recently became a father and works hard to create a sense of trust and safety in the vulnerable spaces that he occupies with clients.