About Ngaio Diagnostics

Ngaio Diagnostics is a privately owned supply company based in Nelson, New Zealand. Established in 1991, we specialise in the distribution and support of quality products to hospital laboratories, community clinical laboratories, veterinary laboratories, veterinary practices, food testing & environmental laboratories and food processors.

As a small privately owned company, we take your business personally. Doing business with us means you will deal with a team who know and understand what you are looking for. Dealing with us is quick and easy and we will always have you in mind as we source or develop new and improved products.


Stuart McKenzie (Managing Director)

Stuart has been with Ngaio Diagnostics since 2015 and came with a background in sales and business development. He also has a BSc degree in chemistry. Contact Stuart for all general business inquiries.

Contact Stuart on:
Telephone: +64 3 548 4727
Mobile: 022 351 5952
Email: stuart.mckenzie@ngaio.co.nz


Rob McKenzie (Founding Director)

Rob founded Ngaio Diagnostics in 1991 after working as a hospital scientist in Clinical Biochemistry and in the area of Quality Management.

Contact Rob on:
Telephone: +64 3 548 4727
Mobile: 021 464 246
Email: rob.mckenzie@ngaio.co.nz

Dr Mak Sarwar (Head of Clinical Diagnostics – application specialist in Dako Pathology & Molecular Oncology)

Mak joined Ngaio Diagnostics in January 2023 as an application specialist with a focus on Agilent Dako and molecular oncology products. He joins Ngaio from a previous position as a postdoctoral research fellow in gynaecologic oncology and is based in Christchurch.

Contact Mak on:
Mobile: 027 648 8481
Email: mak.sarwar@ngaio.co.nz 

Jezelle Leal (Technical Sales Specialist – Randox Specialist and Clinical Diagnostics)

Jazelle joined Ngaio in 2024 to take on the Randox agency. As a qualified Medical Laboratory Scientists she is well positioned to help laboratories improve efficiencies with the product range offered by Ngaio.

Contact Jezelle on:
Mobile: 027 201 7188
Email: jezelle.leal@ngaio.co.nz


Iona Kelly (Technical Sales Specialist – Food, Hygiene and Infection Control)

Iona joined Ngaio in 2021 to focus on the food testing, hygiene and infection control. Iona is a qualified food technologist having graduated from Massey University with honours. Iona is based in Tauranga.

Contact Iona on:
Mobile: 027 283 8633
Email: iona.kelly@ngaio.co.nz



Mike Biddiscombe (Technical Sales Specialist – Point of Care and Drug Testing)

Mike joined Ngaio in 2023 with a focus on our growing drug testing and point of care markets coming from a technical sales background in medical sales.

Contact Mike on:
Mobile: 027 357 5020
Email: mike.biddiscombe@ngaio.co.nz



Dr Magdalena Brunner (Sales and Technical Support – Molecular Biology & Life Sciences)

Magdalena joined Ngaio in 2022 as our Sales and Technical support specialist for our Molecular Biology portfolio. Magdalena holds a DVM, PhD from University of Bern Switzerland. Maggie is currently on maternity leave.

Contact Magdalena on:
Mobile: 021 464296
Email: magdalena.brunner@ngaio.co.nz



Trevor Darling  (Sales and Technical Support – Molecular Biology & Life Sciences)

Trevor joined Ngaio in 2023 as cover while Maggie is on maternity leave.  With a background in Molecular Biology Trevor is able to assist with support for the products available from Ngaio.

Contact Trevor on:
Mobile: 021 464296
Email: trevor.darling@ngaio.co.nz



Kerry Ford (Office Manager)

Kerry is our accounts keeper and administration whizz. Please contact Kerry for all queries regarding accounts or administration.

Contact us on:
Telephone: +64 3 548 4727
Email: accounts@ngaio.co.nz




Ashleigh Churchill (Administration Assistant)

Ashleigh joined our team in early 2022 to aid with the influx of work that the Rapid Antigen Tests brought with them! She is staying on to continue to take the administrative load off Kerry as our business continues to expand.


Telephone: +64 3 548 4727
Email: ashleigh.churchill@ngaio.co.nz