Back to Top

Our Senior Team

Rueben Devlin


Rueben Devlin is President and CEO of Humber River Hospital, a position he has held since 1999. He is trained as an Orthopaedic surgeon having attended Medical School and completing his residency at the University of Toronto.


As an Orthopaedic Surgeon, he practiced for 17 years at Southlake Regional Health Centre, Newmarket. There he held numerous positions including Chief of Surgery and Chair of the Medical Advisory Committee. He had a special interest in joint replacement and sports medicine.


He was previously a member of the Ontario Hospital Funding Formula Committee, served as Vice Chair of the Hospital Report Strategic Advisory Committee, and Chair of the OHA Task Force on Supply Chain Management. He was also a member of the Physician Services Committee and The Hospital On Call Committee, both joint committees of the OMA and the Government. He is a member of the American Academy of Health Care Executives. He has a particular interest in long term health care planning and has been immersed in the planning of the new facility for Humber River.


Dr. Devlin is an ex-officio member of the Hospital Board of Directors and holds the office of Board Secretary.

Rueben Devlin

Barb Collins


Barb Collins joined HRH in November 1999 as Vice President of Planning and Support Services and in 2002 moved to the role of Chief Operating Officer. Barb now leads the implementation of the redevelopment project and is the key liaison to the MoH, Ontario Realty Corporation and Infrastructure Ontario.


Barb graduated as a registered nurse in 1976 and subsequently obtained a BA in Health Admin and in 2005 an MBA from Queen’s University. She has clinical and management experience in a wide variety of programs in acute care hospitals including, Intensive Care, Emergency, Obstetrics, Outpatient clinics and the Operating Room as well as Support Services departments.


From 1995 – 2005 Barb was a member and Vice-Chair of the Health Services Appeal and Review Board.


From 2002 – 2009 Barb was a volunteer member of the Board of Directors for Booth Centennial Health Care Linen Services (BCHLS). She led a significant restructuring of the company, moving the organization to a profitable service oriented business.


Barb Collins

Dr. Narendra Singh


Dr. Narendra Singh is the Chief of Staff at Humber River Hospital. In this role, Dr. Singh will serve as Chair of the Medical Advisory Committee, and will work closely with the Senior Management Team to further enhance the quality of patient care already provided by our hospital’s medical staff.


Dr. Singh has been a member of the Medical Staff at Humber River since June of 1999, most recently serving as Chief of Paediatrics and Interim Chief of Staff.

As Chief of Paediatrics, Dr. Singh’s leadership played a vital role in our Paediatric Program being named one of the top performing hospitals in Ontario for Paediatric Patient Experience in the just-released National Research Corporation Canada (NRCC) Patient Experience Survey. The Program achieved a perfect 100% Positive Score for overall care – an outstanding achievement considering the NRCC Survey results are based on the perceptions of patients who received care in the Program.

Outside our hospital, Dr. Singh is the founder and driving force behind Guyana Help the Kids (GHTK), a charitable organization based in Toronto dedicated to reducing infant mortality in Guyana. Along with several of his medical colleagues at Humber River Hospital, other partners from McMaster, Sick Kids and Nationwide Children’s Hospital in Columbus, Ohio, as well as financial support from many organizations and individuals in Ontario and beyond, GHTK has completely modernized neo-natal care in Guyana.

 Dr Narendra Singh


Marg Czaus

Marg Czaus is the Chief Nursing Officer at Humber River Hospital. In this role, Marg provides leadership for Nursing and Professional Practice, Patient Centred Care, Quality and Patient Safety. She is also responsible for the administration and organization of Critical Care, Oncology, Respirology, Cardiology, Laboratory, Infection Control and Pharmacy Services.


Marg has many years of experience with a number of acute care organizations in Toronto. She held the position of Program Director prior to coming to HRH as the Chief Nursing Officer. Marg completed her Nursing Degree at Ryerson Polytechnical University and an MBA from the University of Toronto.


Marg is currently a member of the Central LHIN Regional Cancer Program Steering Committee and has represented the hospital on a number of external committees. She is also a member of the RNAO and the Canadian College of Health Leaders.



 Marg Czaus

Anthony DiCaita

Anthony DiCaita joined HRH in August 2010 as Vice President of Finance, Chief Financial Officer and Chief Privacy Officer. His portfolio includes the Finance Department, Decision Support Unit, Logistics and Purchasing as well as Health Information Services, Registration & Data Quality.


With over 20 years in healthcare Anthony brings a high level of expertise and diverse experience to HRH. Previously Anthony held positions at Chatham-Kent Healthcare Alliance (Vice President), York Central Hospital (Vice President), Toronto Grace Hospital (Vice-President), and Women’s College Hospital (Chief Financial Officer). In 2008, he worked in Cairo, Egypt where he was the Project Director, recruited to develop start-up operations for the largest children’s cancer hospital in Africa.


Anthony was raised in the Humber River community and holds a Master of Business Administration and Master of Public Administration degree along with being a Chartered Professional Accountant.



 Anthony DiCaita

Scott Jarrett

Scott Jarrett holds the position of Vice President, Patient Services and is responsible for the administration and organization of the programs in Mental Health, Inpatient Medical, Emergency, Nephrology, Family Practice and Surgery as well as the department of Medical Imaging.


Prior to that, he has spent the last fourteen years working in a number of health care organizations. Most recently he was the Senior Director of the Joint Department of Medical Imaging at University Health Network/Mount Sinai Hospital/Women’s College Hospital. Before joining the Joint Department, Scott held management positions at two other hospitals including Administrative Director of Diagnostic Services at St. Joseph's Health Centre in Toronto and Program Manager, Diagnostics and Therapeutics at Cambridge Memorial Hospital. Scott also worked for four years at the OHA in director and consultant roles. After he received his B.Sc. from the University of Guelph, Scott worked as a registered Medical Laboratory Technologist prior to completion of his MBA from McMaster University.


Scott has served as a hospital representative in various external committees: as a member of OHTAC, on the OPSEU negotiating team and the Ministry's Diagnostic Equipment Task Force. He sits on the boards of Booth Centennial Healthcare Linen Services and the Humber River Family Health Team as well as continuing to be an active member of both the Canadian College of Health Service Executives (CCHSE) and the American College of Healthcare Executives (ACHE).




 Scott Jarrett

Dr. Ray Martin


Ray Martin is Vice President of Medical and Academic Affairs at Humber River Hospital. He attended medical school, and completed surgical residency, at the University of Toronto. After Plastic Surgery specialty training, Dr. Martin joined the surgical staff at Toronto General Hospital. He was affiliated with the University of Toronto as an assistant professor of surgery, with a cross-appointment to the Division of Studies in Medical Education. Clinical areas of special interest include medical education as well as major reconstructive surgery.


Twenty years ago, Dr. Martin joined the medical staffs of what was then Northwestern General and Humber Memorial Hospitals. The Head of Plastic and Reconstructive Surgery at Humber River Hospital, Dr. Martin has been actively involved with our new hospital redevelopment project, especially in the areas of clinical design and technology integration.



 Ray Martin
Patient Care Reinvented.