Specialists in machining, metal fabrication, and maintenance


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Machining
CNC lathe and mill. Manual Lathe and Mill. Punch Press. Drilling & tapping. Thread cutting (internal & external) Reaming & precision hole finishing. Surface grinding. Slotting & broaching.
Metal Fabrication
Aluminium, Stainless, and Mild steel fabrication. Cast Iron Repairs. Brazing. Tig, Mig, Arc and Oxy Fuel welding. Folding and Forming sheet metal.
Maintenance Engineering
We provide reliable maintenance engineering services including preventative maintenance, breakdown repairs, equipment servicing, and shift cover support.
We also support efficiency improvements through air and water leak detection, utilities monitoring, and data collection—helping reduce downtime and operating costs. Certified in Boiler Operation (Level 3) and Refrigeration Operations (Level 4).
Our Core Values
MATARANGA
PROFESSIONALISM
AUAHATANGA
INNOVATION
MATE URUROA
PASSION TO THRIVE
TUKU IHO
TEACHING THE FUTURE GENERATION

We are a Māori-owned mechanical engineering business based on General Engineering and Steel Manufacturing Work. We make steel products & components for clients from their designs or offer a complete design and manufacturing service.
We also do Site Engineering Services & Maintenance with Boiler & Refrigeration Operations Services. Our
customers include elevator manufactures, process manufacturing & food manufacturing plants across Christchurch.
We will do project work anywhere inside NZ, working from our workshop at 4 Coleridge St, Sydenham. Ahu Engineering has taken over the workshop from Mark Sutton Engineering, assuring our existing clientele know exactly where we are.
Meet Caleb Orotaunga

Caleb grew up in the North Island before making the move south to study engineering where he went on to complete his mechanical engineering qualification and was awarded ATNZ Apprentice of the Year in 2018.
With 12 years of experience in the industry, Caleb has worked as both a mechanical engineer and site services engineer, bringing strong hands-on knowledge and problem-solving skills to every job.
Outside of work, Caleb is a busy dad of three. When he’s not on the tools, you’ll find him outdoors with his wife and children, hunting, fishing and camping whenever he gets the chance.
Hardworking, practical, and family focused, Caleb is proud to be part of Ahu Engineering.
Meet John Slane

Born and bred in Christchurch, John is a qualified mechanical engineer who has continued to build on his skills, Apprentice of the year finalist and completing further study to achieve his Level 5 qualification.
You may recognise John from his 13 years at Mark Sutton Engineering, where he built a strong reputation and knows the workshop inside and out. With a commitment to doing things right, John brings practical experience, attention to detail, and pride in his work to every job.
Outside of work, John is a busy dad of two. In his spare time, you’ll find him keeping fit at the gym or heading off on adventures with his wife and children.
Reliable, hardworking and takes real pride in his work, John is proud to be part of Ahu Engineering
