Meet Dr. Guthrie

Dr. Shasha Oosthuizen completed her Doctor of Philosophy (Ph.D.) degree in Clinical and Counselling Psychology at the University of Toronto. She is a professional member of the College of Psychologists and Behaviour Analysts of Ontario (CPBAO) and the Ontario Psychological Association (OPA). Dr. Oosthuizen completed her training in Ontario and has worked in diverse clinical settings, including private practice, hospitals, and universities.

At Lakeview Psychology, she is currently a clinical psychologist working under the supervision of Dr. Andrea Guthrie, C. Psych., in which she provides therapy for adults with a wide range of concerns. Dr. Oosthuizen provides intervention services for clients experiencing anxiety, depression, and past or present relationship difficulties. She also supports clients dealing with trauma or PTSD and grief or loss, such as a relationship break-up, divorce, grief of a loved one, and the loss of a pet. Dr. Oosthuizen has extensive experience helping clients with life adjustment difficulties (e.g., starting college/university, relocation, retirement), occupational stress, and burnout. She has been trained in various treatment modalities, including cognitive behavioural, psychodynamic, attachment-based, relational, dialectical-behavioural, and emotion-focused therapies. Dr. Oosthuizen believes in tailoring treatment to fit individuals’ unique goals and needs, ensuring a personalized approach to therapy.

Dr. Oosthuizen believes everyone is doing their best to navigate life’s challenges, but sometimes, extra support is needed to feel better. She sees psychotherapy as a type of self-care and believes self-care is crucial for our wellness. Dr. Oosthuizen provides a safe, nonjudgmental, and authentic space for clients to explore their experiences, thoughts, and emotions. Her goal is to help clients cultivate self-compassion, which she believes is critical to achieving psychological well-being.

Leah obtained a Bachelor of Arts from the University of Waterloo, a Bachelor of Education from York University, and her Master of Psychology from Adler Graduate Professional School in Toronto. She is working toward registration with the College of Psychologists and Behaviour Analysts of Ontario (CPBAO) as a Psychological Associate under the supervision of Dr. Guthrie.

Leah taught in the local school board for 17 years and then worked in private practice providing psychological services to remote indigenous communities across Ontario, Nunavut, and Québec. Her experiences in both teaching and private practice gave her a strong understanding of the uniqueness of each person and the importance of tailoring treatment to each client’s individual strengths and needs. She uses a strengths-based approach and has worked with a variety of individuals with a variety of presenting needs, including Anxiety, Depression, ADHD, ASD, ODD, grief and loss, trauma, and learning problems.

Leah believes that everyone does the best they can with the resources they have and she is passionate about helping others to recognize resources within and around them. In working with clients, she maintains a gentle, honest, and empathetic approach.

Cristina Radic is currently completing her Doctor of Psychology degree at the University of Prince Edward Island (UPEI). She has completed her final year of clinical residency training in private practice and has worked previously in various settings, including universities, immigration & refugee services, and was a training lead with the Psychology Training Clinic.

At Lakeview Psychology, she works as a therapist under the direct supervision of Dr. Andrea Guthrie, C. Psych. She sees adults facing a wide range of mental health concerns. She offers a private, non-judgmental, and creative space to explore and process your specific experiences. During the initial session, she will use a collaborative approach to identify your goals for therapy. As you describe your present concerns and share important aspects of your history, we will develop a tailored therapeutic plan to work towards your goals, alleviate symptoms, and cultivate personal growth.

She uses an integrative approach to practice that combines theories of human psychological development with an understanding of affects/emotions and neuroscience research to help address your current difficulties. She has specific experience working with clients dealing with relationship issues, anxiety, grief, depression and complex childhood trauma. Life can sometimes be challenging, and she believes that there is a way forward through accessing the skills and strengths you already hold, in addition to developing new ways of thinking, feeling, and experiencing life.

Dr. Somayyeh Kamalou completed her PhD and MA in Clinical and Counselling Psychology at the University of Toronto and is a Clinical Psychologist (Supervised Practice) with the College of Psychologists and Behaviour Analysts of Ontario. She currently practices under the supervision of Dr. Andrea Guthrie at Lakeview Psychology. She has thousands of hours of experience in private practice, hospitals, and universities, supporting individuals through a wide range of mental health and life challenges.

Dr. Kamalou works with individuals experiencing depression, anxiety, trauma, OCD, PTSD, ADHD, grief, relational challenges, emotional regulation difficulties, stress, and low self-esteem. She also supports individuals who wish to explore their relationship patterns, enhance emotional and sexual intimacy, heal from past relational wounds such as infidelity or betrayal, and manage challenges related to finances, parenting, or extended family dynamics. She also supports clients facing significant life circumstances, such as coping with chronic physical pain, terminal illness, or the loss or illness of a loved one.

As an integrative psychotherapist, Dr. Kamalou tailors her approach to each client’s unique needs, drawing from Emotion-Focused Therapy (EFT), Dialectical Behavior Therapy (DBT), Cognitive-Behavioral Therapy (CBT), Trauma-Informed Therapy, Client-Centered Therapy, Attachment-Based Psychotherapy, and Psychodynamic Therapy.  Whether you are seeking support for mental health concerns or personal growth, Dr. Kamalou is committed to helping you feel understood, supported, and empowered on your journey toward well-being. She provides a warm, safe, and collaborative space where clients can explore their emotions, develop coping skills, and work toward meaningful growth. She offers therapy in both English and Persian and welcomes clients from diverse backgrounds. 

Jessica is member of the College of Registered Psychotherapists of Ontario and is currently under the supervision of Dr. Guthrie. She has worked in the area of Psychology since 2007 and has experience in risk prevention/management, teaching/training, and psychotherapy.

In addition to her formal education, Jessica has received further training in grief and loss, DBT, group therapy, behaviour therapy, cognitive behaviour therapy (CBT), and trauma-focused therapy. Jessica has experience working with individuals, and groups; counselling a variety of issues including, relationship management, anxiety, depression, OCD, anger management, self-esteem, grief and loss, trauma, and a variety of other life transitional issues. In addition, Jessica has over ten years experience supporting individuals with a dual diagnosis, learning difficulties, and personality complexities such as borderline personality disorder, bipolar disorder, Autism and Tourette’s syndrome. 

In addition to private practice, Jessica works for a non profit agency. As a psychotherapist, she provides authentic, empathetic, non-judgmental, insightful support as she journeys with her clients through a variety of challenges they face.

Magda Leus is a Registered Psychotherapist with the College of Registered Psychotherapists of Ontario and practices under the supervision of Dr. Andrea Guthrie. She provides psychotherapy services to adults in Barrie and across Ontario. Magda works primarily with anxiety and depression, including social anxiety, health anxiety (illness anxiety), and body-focused repetitive behaviours such as skin picking (excoriation disorder) and trichotillomania. She offers evidence-based therapy that is often structured and goal-oriented, while remaining responsive to each client’s needs and pace. Her approach is grounded in cognitive-behavioural therapy (CBT) and thoughtfully incorporates exposure-based strategies when appropriate. Therapy focuses on understanding and changing patterns that maintain anxiety, low mood, and compulsive behaviours, with an emphasis on practical strategies, skill development, and meaningful change. Magda also supports individuals who are navigating significant life changes or struggling to adjust to new or unexpected circumstances, such as changes related to health, work, relationships, or family roles. In addition, she works with adults impacted by complex family dynamics, including experiences of parentification or growing up in emotionally unpredictable or substance-affected households, particularly when these early experiences continue to influence current functioning.

Magda values therapy that balances clarity, structure, and emotional safety. Her work emphasizes a balance between insight and practical strategies, supporting clients who want therapy that is both reflective and oriented toward change.

Brittany obtained her Master of Arts in Counselling Psychology and is a member of the College of Registered Psychotherapists of Ontario (CRPO) as a Registered Psychotherapist. She is currently under the supervision of Dr. Guthrie

Brittany has a passion for helping individuals overcome challenges and reach their full potential. She integrates several evidence-based approaches in her practice, including emotion-focused, cognitive behavioural, narrative, and solution-focused. These techniques allow Brittany to tailor her approach to each individual’s unique needs and goals, empowering clients to find their own solutions and narratives. Brittany creates a safe and supportive space for clients from all walks of life to explore their experiences and emotions. With a focus on building resilience and promoting self-awareness, Brittany helps clients develop the skills and perspectives necessary for a fulfilling and meaningful life. Whether you are struggling with a specific issue (such as trauma, depression, anxiety, relationship difficulties, etc.) or simply seeking personal growth, Brittany is committed to supporting you on your journey.

Michael earned his B.A. Honors degree from Brock University and is set to graduate from the MACP Program at Yorkville University. Currently, he is a student member of the College of Registered Psychotherapists of Ontario, working towards his designation as a Registered Psychotherapist (Qualifying), under the supervision of Dr. Guthrie.

Michael believes that genuine connection and understanding are fundamental to the healing process. He recognizes the importance of both being heard and understood in therapy. By focusing on the individual’s strengths, Michael works collaboratively with clients to explore solutions and facilitate positive change. He tailors each therapeutic experience to highlight and build upon these strengths, understanding that every person has unique capabilities.

As a male therapist, Michael recognizes that gender stereotypes can sometimes make seeking therapy challenging. His focus is to work with individual’s unique needs and goals as well as to create a safe and accepting environment for everyone. 

Drawing from humanistic, psychodynamic, and cognitive counseling approaches, Michael tailors his methods to fit the distinct needs of each individual. His personal life experiences have given him a deep appreciation for the uniqueness of every person’s journey. No matter the challenges you face, Michael is dedicated to walking alongside you, offering support, encouragement, and a steadfast belief in your ability to navigate your path.

In 1994, Dr. Kneer obtained his Ph.D. in Educational Psychology with a minor in counseling from the University of Arizona. During this time, he published research on Fuzzy Trace Theory and children’s memory development with his mentor Dr. Charles Brainerd. Dr. Kneer has assessed over 3,000 individuals (preschool age through adults) both privately and with various agencies, school districts, and post-secondary institutions. 

Dr. Kneer’s passion is in working with individuals and students to successfully ascertain what their cognitive strengths and weaknesses are as well as their emotional needs. He has experience in evaluating for behavioural problems, learning disabilities, ADHD, as well as various autism spectrum and emotional disorders.   

Although most of Ryan’s past experience was as a K-12 salaried school psychologist, he also headed the Quality Assurance Program at the Northern Ontario Assessment and Resource Centre. He continues to teach at Laurentian University part-time as a professor of Fundamentals of Psychometrics and Psychology of Education.            

Lise is a Registered Early Childhood Educator and has been working in the field for over 20 years. She has conducted parent workshops such as ‘1234 Parents!’ and ‘Nobody’s Perfec’t as well facilitated various programs such as ‘School’s Cool’ and early learning preschool programs. As a Triple P (Positive Parenting Program) provider, Lise enjoys supporting families in her community. She has a great passion for children and believes that every child matters and that children are our future. Providing opportunities for them to grow into confident, capable and resilient individuals is something that is near and dear to her heart. Lise chaired and co-chaired her local Neighborhood Community Team committee in Sudbury for 2 years. She is currently enrolled in Stuart Shanker’s Self-Reg course through the MEHRIT Centre. In the last few years, Lise has had the opportunity to provide psycho-educational assessments further adding to her passion of supporting families in providing tools for success. At Lakeview Psychology, she works alongside Dr. Kneer to provide comprehensive psychoeducational evaluations.