Our Team
Dr Winnie Chege
Founder | CEO | Highly Specialist Clinical Psychologist
Registered with Health & Care Professions Council (UK) and the Kenya Counselling & Psychological Association.
Dr. Chege is a skilled Clinical Psychologist with extensive experience spanning the public, private, and non-statutory sectors. She holds a BSc in Psychology, an MSc in Neuroscience, an MSc in Clinical Psychology and Health Services, and a Doctorate in Clinical Psychology. Dr. Chege integrates trauma-informed, culturally sensitive care with innovative, systems-level solutions, addressing both individual wellbeing and the broader systems that support it. She works across clinical practice and organisational consultancy, driving sustainable transformation and fostering change.
Her clinical expertise spans adult, child, and specialist mental health services, where she has worked with individuals and groups facing complex psychological and emotional challenges, including mood and anxiety disorders, trauma, and relationship and adjustment difficulties. Using an integrative approach, Dr. Chege delivers specialist, evidence-based therapies such as Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT), Compassion Focused Therapy (CFT) and Narrative Therapy, tailored to meet the unique needs of her clients.
Dr. Chege has designed and led bespoke therapeutic interventions and training programmes within both statutory and non-statutory sectors, promoting a culture of excellence and collaboration across public and private organisations. She also provides clinical supervision, supporting professionals and teams to enhance their practice and build resilience within organisations.
Her leadership extends beyond clinical care, driving transformation in service design, multidisciplinary team management, policy development, and organisational systems change. Dr. Chege works with leaders and teams to implement tailored, systemic solutions that prioritise mental health, organisational culture, and resilience. Through strategic leadership, she has reshaped practices in mental health service delivery and organisational health, cultivating environments that encourage wellbeing, collaboration, and long-term success.
At the core of Dr. Chege’s work is a commitment to creating and fostering environments where both individuals and organisations can recalibrate, empowering them to transform how they function and thrive. Through her leadership at REST, Dr. Chege continues to integrate psychological expertise with strategic leadership, driving meaningful change that fosters compassionate, resilient, and sustainable systems in mental health and organisational health.
Dr Helena Kaliniecka
Highly Specialist Clinical Psychologist
Registered with the Health & Care Professions Council (UK)
Dr Kaliniecka is a Highly Specialist Clinical Psychologist with over a decade of experience working with children, families, and the wider systems that support them. She specialises in trauma-informed, culturally sensitive, and socially just approaches, combining evidence-based therapies such as Narrative Therapy, CBT, and KIDNET (Narrative Exposure Therapy for children) to tailor interventions that meet complex individual and systemic needs.
Her work spans direct clinical therapy, multi-agency consultation, supervision, and training. She is skilled in collaborating across health, education, social care, and community settings, to build integrated and effective support networks around children and young people.
In her leadership roles, Dr Kaliniecka has led innovative projects supporting vulnerable populations including unaccompanied asylum-seeking children, and young people affected by interpersonal violence. She is committed to strengthening services and organisations through reflective practice, policy development, and workforce training, and has extensive experience working with schools and community organisations.
Dr Kaliniecka holds a Doctorate in Clinical Psychology and has completed extensive specialist training in trauma, narrative therapy, and culturally sensitive approaches. She is passionate about empowering children, families, and professionals through collaborative, strengths-based work that acknowledges the impact of wider social and cultural contexts on mental health.
Jason Shields
Consultant & Researcher
As co-founder and director of Philo, a community-based CIC in South London, Jason has led participatory action research and creative programmes that use play, art, and intergenerational practice to explore collective wellbeing, empowerment, and liberation. As a cultural worker, he bridges scholarship, strategy, and creative engagement, helping organisations and communities alike to develop sustainable, responsive, and equitable approaches to systems change.
At REST, Jason consults on organisational and professional development, contributing to strategic thinking, systems leadership, and cross-sector change. He delivers training and workshops that translate principles of cultural sensitivity, co-production, and social justice into measurable and sustainable action. His work supports leaders and strengthens the capacity of teams and institutions to embed equitable, relational, and contextually grounded care.
Jason plays a pivotal role in shaping strategy, driving systems change, and embedding integrated practice across services and sectors. He anchors work that is practical and transformative, grounded in care, and committed to long-term impact.
Jason Shields is a consultant, researcher, educator, and cultural worker whose interdisciplinary practice spans theology, social justice, urban studies, and the arts. He holds a BSc (Hons) in Business Computing and an MA in Theology from King’s College London, and is about to begin a PhD in Geography and Social Justice at King’s, exploring race, urban studies, and spatial justice.
Jason has consulted across education, health, justice, community, faith, and corporate sectors, working with schools, colleges, universities, churches, the NHS, youth justice services, local councils, and voluntary and community organisations throughout the UK. His work integrates systems-level thinking with creative methodologies, supporting organisations to embed equitable, reflective, and contextually grounded practice. He has developed and delivered training on culturally sensitive, co-produced approaches to interventions addressing violence affecting young people and has lectured at universities, sharing critical perspectives on race, social justice, intersectionality, and participatory action research.