Doctoral-level psychology specializing in psychological & personality assessments and mood and trauma-related disorders—serving clients online across Ontario.
About us
Atrium Psychology is a doctoral-level psychology clinic based in Ontario, Canada, specializing in psychological and personality assessments, and the treatment of mood and trauma-related disorders.
We work with individuals seeking clarity, diagnostic precision, and structure—often after years of limited progress with general counselling.
Our approach is grounded in evidence, ethics, and empathy.
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We help clients uncover patterns, gain insight, and restore emotional balance through depth, structure, and compassion.
Why Atrium
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28+ years of practice directing the clinic by Dr. Zafire Fierro, PhD, C.Psych
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Team of licensed and supervised clinicians
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Research-informed, precision-based approach
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Clear, respectful communication and informed consent
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Wide variety of combined evidence based treatment choices including somatic and leading edge modalities
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Standardized diagnostic assessments
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Personalized holistic supports
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Trauma informed client care
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Multilingual services available (EN/ES/FR/RS/UK/PL)
Who We’re For
For individuals whose needs go beyond general psychotherapy including complex mood concerns, trauma histories, and recurrent relational or personality-pattern challenges.
SERVICES
Psychological & Personality Assessments
​Adult Students & Adults
Comprehensive evaluations designed to understand mood, trauma, personality, and relational patterns.
Each assessment includes clinical interviews, standardized testing, and an evidence-based formulation that guides next steps in care.
Diagnostic clarification, treatment planning, and personality structure assessment.
Mood & Trauma-Related Disorders
Adults experiencing anxiety, depression, burnout, or trauma symptoms
Evidence-based assessment and therapy for individuals struggling with mood instability or trauma-related symptoms.
We integrate CBT, DBT, and trauma-informed frameworks to build emotional regulation, stability, and resilience.
PTSD, anxiety, depression, burnout, adjustment challenges.
Complex Personality & Relational Patterns
​Adults with recurrent relationship conflicts, emotional dysregulation, or identity challenges
Specialized assessment and treatment planning for personality-related dynamics and long-standing emotional patterns.
Our work explores attachment styles, coping structures, and self-concept to create lasting change.
Borderline, narcissistic, or avoidant traits; attachment trauma; codependency.
Psychological Consultation & Clinical Supervision
Professionals & Organizations
Consultation for clinicians, educators, and agencies seeking guidance on assessment interpretation, trauma-informed frameworks, or complex case formulation.
Supervision available for psychologists in supervised practice (under Dr. Fierro, PhD, C.Psych).
Case formulation, assessment feedback, ethics and diagnostic discussions.
+28
Years of supporting individuals through trauma recovery, relational healing and existential exploration
Integrative clinical experience rooted in research and aligned with humanity
Research-informed, precision-based approach
Somatic integrated Psychotherapy & Mindset training
Meet our team
Finding the right therapist matters. With a small and intentional tribe, we focus on building meaningful connections where you feel safe, seen and supported every step of the journey.
Dr. Zafire Fierro
PhD, C. Psych.,
Clinical & Counselling Psychologist | Director at Atrium Psychology
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Focus Area: Psychological assessment and diagnostic clarification · Clinical supervision and consultation · Treatment-planning oversight · Clinical governance and quality assurance
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Population Served: Adults | Couples | Clinicians under supervision/consultation
Role & Approach:
With nearly 30 years of experience spanning pediatric and adult clinical psychology, Dr. Fierro leads Atrium’s clinical direction and assessment services. She supervises clinicians, consults on complex cases, and oversees diagnostic formulation, treatment planning, and quality of care across the clinic.
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Her approach combines scientific rigour with a deeply human understanding of each person. Informed by developmental, relational, trauma-informed, and somatic perspectives, she helps Atrium’s team move beyond labels toward clear formulations and individualized recommendations that meaningfully follow from the evidence.
Hennadii Stavytskyi, PhD
(Supervised Practice)
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Languages: English, Ukrainian & Russian
Populations
Adults and Young Adults
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Areas of Focus
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Psychological assessment and diagnostic clarification
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Autism and ADHD assessment
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WSIB and workplace-related psychological assessment
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Anxiety, mood, and trauma-related concerns
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Developmental history and lifelong patterns
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Return-to-work considerations and treatment recommendations
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Approach
Psychological assessments are conducted through a calm, structured, and impartial process designed to help you better understand your psychological functioning, lifelong experiences, and current concerns. Careful attention is given to your unique history and the broader context of your experiences so that findings are thoughtful, evidence-informed, and free from assumptions.
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Hennadii holds a PhD in Developmental Psychology and provides psychological assessments in English, Ukrainian, and Russian under the supervision of Dr. Zafire Fierro, Clinical and Counselling Psychologist.
This could be YOU!
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Are you a mental health professional looking for a practice where you can grow, feel supported, and do meaningful work?
You approach your work with curiosity, humility, and respect for the complexity of each person’s experience. You value thoughtful care, professional autonomy, ethical practice, and the opportunity to keep developing alongside a supportive team.
At Atrium Psychology, your perspective is valued, your growth is encouraged, and you are supported in providing care that feels both meaningful and genuinely human.
If this sounds like the kind of practice—and team—you have been looking for, we would love to meet you.
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Stephanie Nichols
MPsy
Masters in Psychology
Supervised Practice (awaiting registration)
Focus Area: Anxiety, Depression, Trauma, Mood disorders, NPD Emotional Regulation, Divorce Recovery, and Neurodivergence including ASD and ADHD
Population Served: Young adults | Adults
Approach:
Stephanie supports young adults and adults experiencing anxiety, depression, trauma, mood concerns, emotional dysregulation, divorce and relationship recovery, and the effects of emotionally harmful relationships. She has a particular interest in supporting neurodivergent adults, including those with ADHD and autism.
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Her approach is warm, collaborative, trauma-informed, and neurodiversity-affirming. Drawing from CBT, ACT, CPT, DBT, and mindfulness-based therapies, Stephanie helps clients understand difficult patterns, strengthen coping skills and boundaries, and move forward with greater confidence.
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Stephanie holds a Master’s degree in Psychology and provides psychotherapy under clinical supervision while completing the requirements toward professional registration.
David Da Silva, BA, MSW, RSW
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Populations
Youth (12+) and Adults
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Areas of Focus
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Anxiety and stress-related concerns
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Depression and mood-related challenges
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Life transitions and adjustment
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Gender identity and sexual orientation exploration
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Relationship and interpersonal concerns
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2SLGBTQ+ and minority stress experiences
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Self-esteem and emotional well-being
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Approach
Work is grounded in curiosity, compassion, and understanding the full context of a person’s experience. Sessions combine thoughtful conversation with evidence-informed approaches to help clients make sense of emotional patterns, life challenges, and personal growth.
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Support is collaborative and tailored, focusing on building self-understanding, emotional resilience, and meaningful change.
Hanna Chisholm
BScN, RN​
​International Medical graduate (IMG)​
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Focus Area:
Mindset and Mental Resilience, Stress Management, Self-Confidence, Healthy Boundaries, Life Balance, Personal Accountability, Sustainable Routines, and Strength-Based Wellness.
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Population Served:
Young Adults | Adults
Approach:
Hanna supports young adults and adults who want to strengthen emotional resilience, rebuild self-confidence, establish healthier boundaries, and create greater balance in their daily lives.
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Her approach is direct, practical, and encouraging. Drawing from her military training, nursing and medical background, Hanna helps clients move beyond limiting patterns, develop sustainable routines, and build the discipline needed to follow through on meaningful change.
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Hanna also brings her experience with strength training into her understanding of mindset—helping clients recognize that resilience is developed through consistent, intentional practice. She is especially well suited to individuals who appreciate compassionate support paired with honest reflection, accountability, and purposeful action.
Dr. Tamarah Chaddah ND, MSCP
Naturopathic Doctor| Women’s Health & Hormone-Focused Care | Menopause Society Certified Practitioner
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Populations
Adult Women
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Areas of Focus
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Women navigating perimenopause, menopause, hormonal health, menstrual concerns, bioidentical hormone therapy, sleep, mood, energy, weight changes, stress, burnout, and overall wellbeing.
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Approach
Dr. Chaddah’s approach is collaborative, educational, and individualized. She integrates clinical assessment, evidence-informed care, hormone therapy, nutrition, lifestyle medicine, and preventive health to help patients better understand their symptoms and make informed decisions about their care.
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She focuses on helping women move from confusion to clarity, creating practical treatment plans that support long-term health, resilience, and wellbeing.
Kim Hayne
Client Concierge & Clinic Coordinator​
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Kim Hayne
Client Concierge & Clinic Coordinator
From your first contact with Atrium, Kim is here to make the process feel clear, welcoming, and thoughtfully supported. She helps clients navigate intake, scheduling, and ongoing administrative needs with warmth, discretion, and exceptional attention to detail.
With a background in client relations and clinic operations, Kim ensures that each person’s experience reflects Atrium’s commitment to responsive, respectful, and highly personalized care. As the parent of a child with special needs, she also brings a deeply personal understanding of advocacy, accessibility, and how meaningful it is to feel genuinely heard.
Kim is often the first reassuring voice and the steady point of connection throughout your experience with Atrium.
Curious about how this process may support you?
Book a free 15-minute discovery call to explore whether this approach aligns with your current needs, or to help determine if a referral may be appropriate.
or call
Our Difference
Unlike general psychotherapy practices, Atrium Psychology specializes in complex psychological presentations—offering clarity through diagnostic precision and depth-oriented understanding.
Our clinicians don’t just listen; they map, measure, and interpret what’s beneath the surface, helping clients rebuild from the inside out.
Interested in Joining the Atrium Team?
We’re always open to connecting with licensed clinicians who share our commitment to client-centred care.
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Contact us at
Notice of Security Incident Involving Former Zafire Inc. Systems
We are sharing important information regarding a security incident that occurred in systems previously managed by Zafire Inc. during the period when the practice operated under the name Zafire Holistic Wellness (ZHW).
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This incident does not involve Atrium Psychology’s current systems, and all present clinical records remain secure.
To support our clients with full transparency, we have prepared a detailed notice outlining what occurred, the steps taken, and guidance for protecting your information.
Please review the full notice below.
Get in Touch
Our Hours
Monday - Friday 07:30AM – 9:00PM
Saturday 09:00AM – 2:00PM
