Our Team

Our leadership team and senior management

Carole Kaffes

General Manager

Carole 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.

Before joining us at Wakefield, Carole had a substantial career in the health sector, overseeing up to 21 facilities at a time as a General Manager and Director of Nursing. She brings a solid clinical understanding and her experience at Wakefield to lead our comprehensive hospital and kaimahi to deliver on our purpose to provide continuing excellence in the health and wellbeing of the people in our care.

Marie Verschoor

Endoscopy Manager

Anna Chambers

Specialist Centre Practise Manager

Shannon Harkness

Theatre Services Manager

Joining the Wakefield Management team, Shannon brings extensive leadership and management experience in both private and public hospitals primarily in the perioperative environment. Most recently, Shannon has led the Perioperative Department of Hutt Valley District Health Board.

A highlight motivated and supportive manager, Shannon brings exceptional qualities and skills to Wakefield Hospital, including her long-standing reputation of delivering superior care and surgical for people requiring healthcare services.

Our Evolution leadership team

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.

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