Leadership Team

Lakeridge Health is governed by a voluntary Board of Trustees made up of community members, medical staff, volunteer, and Foundation representatives.

Our Senior Management Team is focused on implementing the Strategic Plan of Lakeridge Health. The team is responsible for overseeing the administration of the hospital and relentlessly pursuing quality and safety improvements.

Cynthia Davis, BSc, MSc, President and CEO

Cynthia DavisCynthia Davis joined Lakeridge Health as President and CEO in January 2021.

She is a registered nurse by profession and has over three decades of health-care experience. Cynthia brings a mix of leadership skills and operational experience acquired through her progressive leadership roles in Ontario and Newfoundland. She has a passion for patient-centred care, which she fosters through engagement and partnerships.

Cynthia’s career began as a front-line nurse in a variety of settings in Canada and the United States. In Canada, she began work at St. Michael’s hospital where she had the opportunity to work as a manager in the surgical and cardiac programs during a time of change for the organization. She later joined St. Mary’s General Hospital in Kitchener, Ontario and led the development of a new tertiary level Cardiac Program.

Following this, Cynthia returned to her home province where she joined Western Health, one of four leading integrated health authorities in Newfoundland and Labrador responsible for the delivery of integrated health services to a diverse population across the entire continuum of care. She served eight years as the Vice President of Patient Services and Chief Nursing Officer. She went on to be appointed the President and Chief Executive Officer.

Cynthia is a graduate of the Western Regional School of Nursing diploma program and holds a Bachelor of Science (Nursing) from Dalhousie University and a Master of Science from the University of Toronto. She is a member of many provincial and national health-care engagement groups and a member of the Canadian College of Health Leaders.

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Phone Cynthia: 905-576-8711 ext. 34421

Dr. Randy Wax, Chief of Staff

Dr. Randy WaxDr. Wax joined Lakeridge Health in 2010 as Section Chief of Critical Care, helping to evolve the service into an expanded regional academic critical care site and Clinical Teaching Unit with Queen’s University in Oshawa, and led the formation of a multi-site department at the Ajax Pickering and Bowmanville Hospitals. He also serves as the Medical Director of Academic Affairs, having held this position since 2010, as well as the President of the Medical Staff Association, having previously served on the Executive.

He is also the Central East Sub-Region Lead for Critical Care in conjunction with Ontario Health. In addition, Dr. Wax has worked as a Transport Medicine Physician with Ornge, Ontario’s air ambulance and critical care transport service.

Within academia, he is an Associate Professor in the Department of Critical Care Medicine and the Regional Director of Clinical Education with the Faculty of Health Sciences at Queen’s University. He also serves as an Assistant Professor in the Department of Medicine at the University of Toronto and has held an adjunct faculty role at Ontario Tech University.

Dr. Wax is an active researcher and has lectured extensively. He has published numerous papers and book chapters on a variety of topics. One of his papers on COVID-19 patient care has been downloaded more than 100,000 times around the globe and cited in more than 1,000 research papers.

Dr. Wax has received specialty certifications in Internal Medicine, Critical Care Medicine, and Emergency Medical Services. He has also been inducted as a Fellow of the American College of Critical Care Medicine and has received numerous awards from the Society of Critical Care Medicine for his leadership in education, clinical care, and international disaster management. As well, he was selected by the Canadian Association for Medical Education to receive the 2018 Certificate of Merit Award for his commitment to medical education.

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Petrina McGrath, BSN, MN, PhD, Health System Executive, People, Quality and Practice and Chief Nursing Executive (CNE)

Petrina is an accomplished health-care leader with extensive experience leading change and driving results within complex health-care environments. Throughout her career, Petrina has been a committed leader, educator, and researcher in the areas of patient- and family-centred care, quality, safety, and interprofessional practice.

Most recently, she served as the Executive Director of Quality and Safety for the Saskatchewan Health Authority, which delivers health care to 1.2 million people with 43,000 staff and 2,500 physicians.

Throughout all phases of the pandemic, Petrina provided invaluable service and support to the Province of Saskatchewan’s pandemic response as the Safety Officer in the Emergency Operations Centre while continuing with her Executive Director responsibilities.

Petrina sits on the Board of Healthcare Excellence Canada. Created in 2020, the Board brings together the Canadian Foundation for Healthcare Improvement and the Canadian Patient Safety Institute.

Petrina received her Bachelor of Science in Nursing at the University of Saskatchewan, her Master of Nursing at the University of Toronto, and her PhD in Human and Organizational Systems from the Fielding Graduate University in Santa Barbara, California.

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Phone Petrina: 905-576-8711 ext.34447

Kirsten Burgomaster, PhD, Health System Executive, Clinical

Kirsten Burgomaster

An accomplished leader with significant experience in health care, academia, and research in both tertiary and community hospitals, Kirsten has taken on many diverse hospital leadership roles over the years in regional and community care. These include, but are not limited to, roles in oncology, nephrology, diabetes, mental health and addictions, and the Durham Ontario Health Team. She is also an adjunct professor at Ontario Tech University. 

Kirsten has been a leader within the Cancer program at Lakeridge Health for more than ten years. Since 2019, she has served as Ontario Health's (Cancer Care Ontario) Regional Vice President of the Central East Regional Cancer Program (CE RCP), which includes the Durham Regional Cancer Centre at Lakeridge Health.  

As Health System Executive, Clinical at Lakeridge Health, Kirsten has oversight of the CE RCP, Mental Health and Addictions, Pharmacy, Diagnostic Imaging, and Laboratory Medicine. She works with many partners across the continuum of care to create and advance synergies between acute care, primary care, and many community-based programs at a regional and provincial level. 

Kirsten received her Bachelor of Kinesiology and PhD in Physiology from McMaster University and is a graduate of the University of Toronto’s Advanced Health Leadership Program, Rotman School of Management. 

Email Kirsten

Phone Kirsten: 905-576-8711 ext. 36161 

Tabitha Carroll, Health System Executive, Clinical

Tabitha Carroll As Health System Executive, Clinical, Tabitha’s areas of focus include Surgery, Women’s and Children’s Health, Ambulatory Care, Laboratory Medicine, Diagnostic Imaging, and Pharmacy.

Prior to this role, Tabitha served as Lakeridge Health’s Director of Surgery. In this role, she worked closely with the Chief of Surgery to create a surgical plan that aligns with the organization’s strategic plan; in partnership with Capital Planning and Development, established a clinical model of care for the Jerry Coughlan Health & Wellness Centre; led the surgical team through the transition to Epic and established a strategy to optimize Epic within the surgical program; developed a surgical recovery strategy to support Ministry of Health directives on long wait times and surgical back logs; and in partnership with surgical dyads, led the surgical team in quality to be awarded a National Surgical Quality Improvement Program (NSQIP) award of meritorious performance in surgical care.

Tabitha has served in various leadership roles over the past decade with experience in both regional and community hospitals. Previously, she served as the Director of Peri-operative Services, Ambulatory Care, Obstetrics, and Pharmacy at Ross Memorial Hospital where, among many initiatives, she led the pharmacy team through Ontario College of Pharmacists accreditation and collaborated with community partners to develop a COVID-19 response plan, including for long-term care and retirement facilities in the area.

Other leadership roles have included Director of Intensive Care and Women and Children at Peterborough Regional Centre and Director of Intensive Care, Emergency, Dialysis, Chemotherapy, Critical Care and Acute Inpatients at Northumberland Hills Hospital.

Tabitha started her career as a registered nurse, having graduated from Sir Sanford Fleming College in the Nursing Diploma Program. She has also received an Honours Business Administration degree from Trent University and a Master in Health Management from McMaster University.

Brian Pollard, Health System Executive, Clinical

Brian PollardAs Health System Executive, Clinical, Brian’s areas of focus include healthy aging, long-term care, complex continuing care, regional nephrology and diabetes, and family and community medicine. He is also supporting the Durham Ontario Health Team and leading population health engagement, as part of Lakeridge Health’s work related to inclusion, diversity, equity, accessibility, and anti-racism.

For more than two decades, Brian has provided strategic and operational leadership in increasingly senior roles in complex business environments, including the Government of Ontario, Ontario hospitals, and in government policy advocacy and consulting. He has led some of the most challenging initiatives, including transforming the health-care and long-term care systems to be sustainable, ensuring a higher quality of care.

Prior to joining Lakeridge Health, Brian served as the Assistant Deputy Minister (ADM) for the Long-Term Care Capital Development Division at the Ontario Ministry of Long-Term Care (MLTC) where he was responsible for implementing the largest development program in recent provincial history and the commencement of construction and opening of thousands of beds.

He has also held other ADM roles in the MLTC, as well as ADM and Director roles in the Ministry of Health and Long-Term Care with responsibilities for regulating, funding, and setting policy for the long-term care sector and transforming the funding approaches for the hospital and long-term care capital sectors.

Before moving to the Government of Ontario, Brian held executive roles at the Ontario Long Term Care Association and clinical program administration roles at University Health Network and Lakeridge Health. He started his career at ICF (Inner City Fund) in Washington, DC.

Brian holds a Master in Business Administration from the Richard Ivey School of Business, Western University (London, Ontario), a Master in Engineering Management from the George Washington University (Washington, DC), and Bachelor of Science in Chemical Engineering from Rensselaer Polytechnic Institute (Troy, New York).

Sonya Pak, Health System Executive, Clinical

Sonya PakAs Health System Executive, Clinical, Sonya’s areas of focus include the Medicine Program, Emergency Services, Critical Care, and Long-Term Care.

Prior to joining Lakeridge Health, Sonya was the Senior Clinical Program Director overseeing the Emergency Department, Medicine, and Intensive Care Unit at Unity Health Toronto, St. Joseph’s Health Centre site.

Sonya started as a Registered Nurse in downtown Toronto before transitioning to a Patient Care Manager role at Toronto Grace Hospital. Following this, she pursued a Quality and Risk Management role and then moved on to a Project Manager position with the Department of Health Policy, Management and Evaluation at the University of Toronto, followed by an opportunity at the Ministry of Health and Long-Term Care where she helped to coordinate province-wide quality improvement initiatives, including “The Flo Collaborative” and “Releasing Time to Care.”

Sonya later returned to the hospital setting as the Director of Quality and Infection Prevention and Control at Trillium Health Partners. During her eight years at Trillium, she supported the organization during times of transition by taking on other roles, including Medicine, Emergency Department, Mental Health, Flow, Patient Relations, Education, and Enterprise Risk.

Outside of work, Sonya is the mother of three kids, a pretend chef, and an amateur photographer. She is also an avid traveler and considers New York City her favourite place in the world (with up to 30 visits and counting).

She received her Bachelor of Science in Nursing at Toronto Metropolitan University and a Master of Business Administration from the Schulich School of Business, York University. Sonya has also completed formal training in Lean Six Sigma and Workplace Investigations and has completed the San’yas Indigenous Cultural Safety Training Program and Rotman’s Healthcare Leadership Program.

Dr. Ilan Lenga, Chief Information Officer and Regional Chief Medical Information Officer, Central East Ontario Clinical Information System

Dr. Ilan LengaDr. Ilan Lenga joined Lakeridge Health in 2004 and has dedicated his career to advancing the organization in medical information management and technology, promoting standardized care, and improving data quality.

As the CIO, he is responsible for Digital Transformation at Lakeridge Health. Dr. Lenga has played a key leadership role in the procurement of the Clinical Information System for the hospitals across Ontario’s Central East Region and continues to lead the implementation and governance of this system for both Lakeridge Health and the Central East Region. In addition, he serves as the Digital Health Lead for the Durham Ontario Health Team, which is advancing virtual care, data sharing, and analytics throughout Durham Region.

He is a computer programmer and has written and developed health care related computer and mobile phone applications.

Dr. Lenga is also a practicing nephrologist at Lakeridge Health, a lecturer at the University of Toronto, and an adjunct assistant professor at Queen’s University.

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Christopher J. Squire, CPA, CA, Health System Executive, Corporate Services and Chief Financial Officer 

Christopher J. Squire

Chris is an accomplished health-care leader with over 13 years’ experience in financial and support services leadership. 

Prior to his arrival at Lakeridge Health, Chris most recently served as the Vice President of Corporate Services and Chief Financial Officer at Western Health, one of the four leading integrated health authorities in Newfoundland and Labrador responsible for the delivery of integrated health services to a diverse population across the entire continuum of care. In this role, he was responsible for financial services, capital planning and redevelopment, health records, food services, environmental services, and facilities and equipment operations.

During his tenure at Western Health, Chris participated in the implementation of leadership and talent management frameworks; led the development of a financial shared services model for the provincial health sector; participated on the provincial health accord subcommittee, Digital Health; provided governance to provincial eHealth delivery through the eHealth Executive Committee; and served on provincial committees focused on improving efficiency and data quality within the health system.

In addition, his professional accounting designation, in combination with a Master of Business Administration(c), leadership development through LEADS Canada, Management Information Systems training through the Canadian Institute for Health Information, and training in process improvement/Lean, has given him the tools to provide effective financial oversight and leadership to health-care organizations.  

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