Executive Members

Robert Toms
Chief Executive

Mr Robert Toms joined North Metropolitan Health Service in late 2024 and has a proven track record of leading and transforming large and complex organisations, developing the consumer experience, implementing corporate strategy and improving operational performance.

Robert is passionate about creating engaging workplaces and healthy cultures which enable positive staff experience, and great outcomes for patients and consumers.

Prior to this role, he was the Chief Executive at Health Support Services, where he gained considerable experience in information and communication technology, procurement, corporate finance, supply chain management and workforce services within the modern healthcare environment.

Robert has worked across a number of industries and countries and has previously held senior leadership positions at Western Power and Rio Tinto.

Robert has a Bachelor of Arts (Hons) in Business Administration from Nottingham Trent University and Master of Business Administration from the University of West London.

Dr Tina Bertilone
Executive Director Consumer Experience and Clinical Excellence

Tina is a former GP and public health physician with a subspecialty interest in patient safety and quality improvement. She is passionate about supporting clinicians in clinical outcomes measurement, patient reported measures, clinical quality registries and using data to continuously improve clinical care.

Previously, Tina worked for eight years in a variety of senior roles in patient safety and clinical quality at the Department of Health, including executive director, senior medical advisor and manager of a clinical analytics team.

Tina is enthusiastic about new and innovative ways to optimise patient experience and support person-centred care. She has completed a fellowship with the globally leading Institute for Healthcare Improvement and is keen to promote and facilitate a culture of clinical excellence across NMHS.

Renee de Prazer
A/Executive Director, Sir Charles Gairdner Osborne Park Health Care Group

Renee has a wealth of leadership and management experience with more than 25 years' experience as a registered nurse across the public and private health sectors.

Renee joined North Metropolitan Health Service in 2024, leading the team at Osborne Park Hospital as the Service Director prior to moving into the Acting Executive Director role at Sir Charles Gairdner Osborne Park Health Care Group.

Prior to joining NMHS, Renee was the Executive Manager of Clinical Operations for the past two and a half years at Bethesda Health Care and previously held senior positions at Fiona Stanley and Royal Perth Hospitals, including Coordinator of Nursing Education, Acting Nurse Director Practice of Education and Research and managing hotel quarantine for the State during COVID.

Renee's extensive experience managing clinical operations, including human resources, financial management and business planning relating to clinical services, make Renee an asset to the NMHS executive team.

Michelle Gillam
A/Executive Director, People and Culture

Scott Goder
A/Chief Corporate Operations Officer

Theresa Marshall
Executive Director, Mental Health Services and Dental Services

With more than 24 years in the WA health system, Theresa has vast expertise in organisational change; stakeholder engagement; policy development and strategic planning; and program/project design.

Theresa completed her PhD in 2002 and has a Masters in Clinical Psychology and a Masters in Business Management and Human Resource Development.

Before a secondment to the same position in 2017, Theresa was Assistant Director of Patient Safety and Clinical Quality Division at the Department of Health and then Director of Safety, Quality and Performance at SCGH.

Theresa is leading the NMHS implementation of recommendations from the Hugo Mascie Taylor Review of Safety and Quality in WA Health. This includes developing an integrated clinical governance framework focussed on transparent public reporting; and implementing patient opinion to create sustainable changes that will improve our patients’ experiences.

Graham Martindale
A/Area Director, Nursing and Midwifery Services

Parvarti Pillai
A/Executive Director, Commissioning and Redevelopment

Ian Sheldrake
Executive Director Strategy and Transformation

Ian joined NMHS in 2023 and has more than 20 years of consulting experience in providing strategic advice to governments, health services and hospitals across Australia and England.

Previously he worked for the strategy consulting firm Nous Group, where he led the WA Health advisory practice from 2017 to 2023.

Ian has lived and worked in WA since 2014 and in that time has led a diverse range of strategic projects, including: the establishment of the Health Service Boards in 2016; the co-design of multiple health, mental health and AOD services; supporting the Board and Executive teams of multiple health providers to establish their current strategic plans, and providing strategic advice to the Chair of the Taskforce into Infant, Child and Adolescent Health (WA).

Ian is especially focused on how NMHS can thrive within a health system that is continuously reforming.

Jeffrey Williams
Executive Director, Women and Newborn Health Service

Jeffrey brings a wealth of experience in executive and clinical leadership in both public and private health settings and has a strong focus on safe and high-quality service delivery.

In March 2024, Jeffrey joined NMHS from St John of God Bunbury Hospital where he was Chief Executive Officer for five years. Previously, he was the Wheatbelt Regional Director of Nursing and Midwifery at the WA Country Health Service, Director of Nursing and Clinical Governance at St John of God Midland Public and Private Hospitals and Director of Quality and Risk at St John of God Subiaco Hospital.

He is an Adjunct Associate Professor of Nursing at the University of Notre Dame Australia, Fremantle Campus and a Non-Executive Director of St John Ambulance (WA).

Dr Simon Wood
Area Director, Clinical Services

Simon is a senior clinical leader and health care executive with more than 10 years’ experience in senior medical administrator roles and 20 years’ experience as an executive team member in both private and public health care settings.

Simon joined NMHS as the A/Area Director Clinical Services in January 2025. Prior to commencing, Simon was the Child and Adolescent Health Service Executive Director Medical Services for five years, where he provided strategic leadership, advice, and support on professional, educational, research and policy matters.

He has a strong clinical foundation as a specialist emergency physician with expertise in adult and paediatric emergency medicine and is dedicated to advancing medical leadership and improving healthcare delivery.

Previously, Simon was the Director of Medical Services and Director of Emergency Medicine at Joondalup Health Campus.