Our Team

Our leadership team and senior management

Marg Jenner

General Manager

Marg was appointed General Manager of Wakefield Hospital in May 2017 and is responsible for all clinical and operational management of Wakefield Hospital. Marg first joined the company in 1989, working through Nurse Manager, Principal Nurse and Medical Administration Manager roles, before taking a break and returning in 2010 as Practice Manager for the Wakefield Specialist Medical Centre.

As well as a background in nursing, Marg has extensive experience in hospital management and has strong commercial relationships with our specialists as well as a proven ability to attract and retain new specialists. She is the Secretary of the Wakefield Medical Advisory Committee whose primary function is to ensure the hospital’s compliance with clinical and medical standards.

Alison Eruera

Administration and Support Services Manager

Alison was appointed to the role of Administration and Support Services Manager in November 2010 and is responsible for all administration and support services at Wakefield Hospital. Alison first joined the company in 1994, working through as a Nurse, Charge Nurse, and Education Coordinator roles.

As well as having a background in nursing, Alison has extensive experience in health and safety, disaster management and privacy, and holds these portfolios within her role. 

Carole Kaffes

Clinical Operations Manager

Carole has recently taken on the position of Clinical Operations Manager. She has a variety of skills and nursing expertise, as well as an extensive management background having worked in NZ Health Care System for 30 years.

Carole is in charge of providing education and support to all clinical staff which provides continuing excellence in the health and wellbeing of all patients and their families at Wakefield Hospital. She is very passionate about the quality of care health care that all New Zealanders receive.

Coming soon

Practise Manager

Our Evolution leadership team

Sue Channon

Chief Executive Officer

Sue Channon is an established healthcare industry leader with a well-earned reputation for delivering business excellence and growth. Before her appointment to CEO Evolution Healthcare in April 2020, Sue spent more than 20 years in chief executive roles. She most recently was Group Chief Executive at Virtus Health (Virtus), Australia’s leading provider of assisted reproductive services. Sue joined Virtus as Chief Executive in 2004 and lead the growth of Virtus during private ownership, Australian expansion and a successful listing on the Australian stock exchange (ASX) which saw Virtus become the first publicly listed fertility business globally, followed by accelerated international expansion.

Sue’s track record of establishing and growing new services and attracting and retaining doctors is well known, underpinned by her deep clinical knowledge, particularly within fertility, hospitals and diagnostic services. Sue has a reputation as a decisive and impactful leader whose style is collaborative as she supports her team to deliver improvements in operational performance and business growth.

Stephen Johnston

Chief Operations Officer

Stephen Johnston has held senior management positions in various Australian Healthcare organisations over the past 20 years. Prior to joining Evolution Healthcare as Chief Operating Officer in September 2019, Stephen was a Director at Sydney Adventist Hospital, this position saw him lead a multidisciplinary team in building and developing the supporting staff and infrastructure of one of Australia’s largest Private Hospitals.

During Stephen’s five years with Evolution Healthcare, Stephen has transitioned from the General Manager/DON of Waratah Private Hospital in NSW. Under his direction he commissioned the Rehabilitation Centre at Waratah Hospital including a modern gym and hydrotherapy pool with growth in both inpatient and day rehabilitation services developing the Hospital into its future as the centre for rehabilitation excellence in South/West Sydney.

Ben Thynne


Over the past fifteen years, Ben Thynne has gained significant experience in acquiring, redeveloping and managing private hospitals with a focus of delivering excellence in healthcare. Prior to founding Evolution in 2011, Ben was the Founder and Managing Director of Healthe Care Australia. Under Ben’s management, Healthe Care became Australia’s largest privately-owned network of private hospitals. For several years Ben was a director of the Australian Private Hospitals Association. Ben’s qualifications include a Bachelor of Law and a Graduate Diploma in Finance and Investment. He has been admitted to the Supreme Court of Queensland.

Richard Grenfell

Medical Director / Director

With over 35 years as a specialist Anaesthetist, Richard Grenfell founded Boulcott Hospital in Wellington, serving as founding Chairman and CEO. He has been intimately involved in the operational management whilst elevating the medical and surgical capability of the hospital since its inception. Richard stepped down from his role as Chairman in 2005 and as Managing Director in June 2015. He was a Director of Wakefield Hospital from 1989 to 1997 and is currently the Medical Director and a Director of Evolution Healthcare.

Dr Jonathan Coleman

Non-Executive Director

Dr Jonathan Coleman is a former Minister of Health who served nine years as a Cabinet Minister across a range of portfolios. After leaving politics, Jonathan was CEO of Acurity Health Group, now Evolution Healthcare, before joining the Board as a Non-Executive Director. Jonathan holds a medical degree from Auckland University, and his MBA from London Business School.

Matthew Clarke

Chief Financial Officer

Matthew Clarke brings extensive experience providing strategic financial leadership across a portfolio of businesses with over 20 years of experience in finance and commercial management roles across the services and resources sectors. Returning to New Zealand in 2019 after 15 years spent mostly in the UK and Australia, Matthew has previously held senior finance positions with global quality assurance provider Intertek Group, including Group Treasurer in London and most recently Regional CFO based in Sydney.

Alongside our Directors and Senior Management, we have our incredible staff and specialists working with us at Wakefield Hospital. 

Wakefield Hospital is part of Evolution Healthcare