Meet The Team

We have a fantastic team of Doctors, Nurses and Support Staff.

Our Doctors

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Dr Susan Macpherson

Dr Susan Macpherson has practiced in Alexandra since 1988. She enjoys providing holistic family health care, from pre-conception to elderly health. She holds a postgraduate qualification in Occupational Health. She enjoys working with children and teenagers

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Dr Martyn Williamson

Dr Martyn Williamson graduated from Newcastle University UK.  He developed an interest in rural general practice and health services after coming to New Zealand to work in Owaka. He spent 8 years working as the GP in Lawrence, working with the community to retain the local hospital. He has worked alongside Dr Susan Macpherson since 1996. His interest in medical education led to him working at the Otago School of Medicine in Dunedin where he enjoys teaching medical students, running postgraduate courses for doctors and doing some research. He is a fellow of the GP College, and his postgraduate qualifications include the Otago Diploma of General Practice (distinction). He has an interest in musculoskeletal medicine and trigger point acupuncture. He was a founding board member of COHSL (Central Otago Health Services Ltd) the community company which looks after Dunstan Hospital, retiring from the role in 2009. Recently he has developed an interest in the power of nutrition in treating or curing common chronic diseases in ways which surpass the effect of most modern medicines which merely treat the effects of the disease rather than cure. He completed the Cornell University (USA) Certificate of Plant Based nutrition in July 2017. He comes from a well-known local cycling family, and has enjoyed coaching young athletes, with national and international success. He and his wife Liz still ride their bikes enjoying races as well as exploring the wonderful Central Otago countryside.

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Dr Leon Wright

Dr Leon Wright is delighted to be returning to Central Otago (from where his family originate) after 20 years working overseas in Australia and Ireland. He holds Fellowship in the New Zealand and Australian College of General Practitioners and is a Member of the Irish College. His interest in medicine and well-being stems from his youth in Dunedin where he was a member of the St John's Ambulance Brigade. His first degree was in Microbiology (Honours) which was then followed by his medical degree from the University of Otago. In addition, he has gained further qualifications in Obstetrics and General Practice. A passionate rural GP, he is also highly experienced in the fields of Trauma, Paediatrics and Dermatology.

Leon is a keen history buff and enjoys travelling and gardening. He is looking forward to being able to plant and grow New Zealand native plant varieties undisturbed, after spending his weekends in Australia chasing wombats, snakes and kangaroos out of his garden.

Our Practice Nurses and Support Team

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Raylene Fastier

Nursing Team Leader/ Practice Nurse


Registered Comprehensive Nurse (Otago Polytechnic 1988)

Bachelor of Arts (Massey University)

Master of Health Science (Otago University

Clinical Focus - Complex Long Term Conditions and Medication Concordance

I have significant clinical experience working in NZ and the UK including acute orthopaedics, district nursing, nursing lecturer, palliative care, management of a neuro rehabilitation unit for young people and community matron.

My interests include cycling, yoga, meditation and I am an avid reader and movie-goer.

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Dianne Sinnamon

Practice Nurse

I have been fortunate enough to work at Ranfurly Hospital and Ranui Home/Hospital and Dementia Unit and I have found this to be of great help with my role as a Practice Nurse here at Centennial Health.  I am married and have 3 children (2 grown up).  I enjoy walking, patchwork, knitting, cafe visits and getting to know people.

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Lana John

Practice Nurse

Bachelor of Nursing (Otago Polytechnic 1999)

Clinical experience includes a variety of medical and surgical settings, palliative, emergency, endoscopy and outpatient clinics, and most recently Vincent Ward at Dunstan Hospital.

Originally from Alexandra, I am enjoying being back in the community bringing up two young children after years living and working in Australia and the UK.

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Maureen de Thierry

Receptionist/ Administration Assistant

Maureen has been with Centennial Health for more than 25 years commencing in November 1989.  Her wealth of knowledge and familiarity with our patients make her a friendly face behind the reception desk.

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Jackie McDonnell

Receptionist/ Administration Assistant

I started my working career as a receptionist before becoming an enrolled nurse back in the dark ages even before dinosaurs walked the earth. My nursing years were mainly here in Alexandra and in Gore. For the last 8 years I have worked in the homebased services as a Senior Co-ordinator before joining the CHL team in February this year in the capacity of administration/receptionist. I have lived in Alexandra for the last 22 years and love the diversity that Central Otago has to offer.

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Karla Stiles

Practice Manager

I have been working in the health industry for the last 14 years including the Emergency Dept at Dunedin Hospital, Outpatients at Dunstan Hospital and other medical centres.  I am passionate about customer service and going the extra mile for our patients.