Help keep Mangawhai’s essential wastewater services running safely and reliably.
As a Wastewater Treatment Operator, you’ll carry out the day-to-day operation and maintenance of wastewater treatment assets and associated reticulation systems. You’ll complete inspections, monitor plant performance and respond to operational issues while ensuring work meets resource consent, client and regulatory requirements.
This is a hands-on role where you’ll work both independently and as part of a supportive local team.
In this role, you’ll:
We’re looking for someone who takes ownership, works safely and can respond calmly when priorities change. You’ll be practical, reliable and committed to providing a high standard of service to the Mangawhai community.
You’ll bring:
If you don’t have the experience but are willing to learn a sought after wastewater skillset – we welcome your application!
Ngā Painga o te Mahi ki Downer | Benefits of working with Downer
At Downer, our purpose is to enable communities to thrive. You’ll join a team that values practical skills, supports development and takes pride in delivering essential services.
We offer:
Mangawhai offers a relaxed coastal lifestyle within reach of both Auckland and Whangārei. With beaches, walking tracks and a strong local community nearby, it’s a great place to build a rewarding career while enjoying more of life outside work.
Downer’s Energy & Utilities business is an integrated trans-Tasman team delivering services that connect communities to essential networks and infrastructure. We design, build, operate and maintain critical assets across water, electricity, telecommunications, industrial and power generation sectors.
Our people are at the heart of everything we do. Downer is an inclusive employer committed to creating a workplace where everyone feels respected, supported and empowered to succeed. We welcome applications from people of all backgrounds, experiences and cultures.
Please click Apply and follow the prompts to submit your application alongside your CV.
We are committed to a safe working environment for everyone. Successful applicants will be required to complete pre-employment screening, including a medical, drug and alcohol test and Ministry of Justice check.
Downer does not accept unsolicited resumes from recruitment agencies. We will not be responsible for any fees associated with unsolicited resumes.

Enabling communities to thrive.
It’s what we’ve done for more than 150 years. Solving problems. Making the extraordinary run smoothly every day. We’re keeping the lights on and the water flowing. Running the hospitals that take care of us. Delivering the transport that takes us from A to B. Maintaining communication networks that keep people connected. Helping our Government and Defence customers keep them protected. Delivering train fleets. Building bridges, roads and streets. Now we’re building momentum too. Moving forward even faster.
Across Australia and New Zealand, we’re transforming the way we work. Unlocking our potential to lead by example. Using our passion and expertise to deliver complex projects and turn fresh ideas into solutions that make society a better place. Creating opportunities for our people, growth and value for our shareholders, and world-class solutions for our customers. Imagining. Innovating. Engineering. Enabling.