Graduate Reservoir Engineer

Mercury is a bold future-focused organisation, providing energy and telecommunications to more Kiwis than anyone else, leading the way with renewable energy and working toward a sustainable future. At the heart is our purpose. Taking care of tomorrow : connecting people and place today. This pushes us to do all we can to create a better future for our people, our communities, and Aotearoa New Zealand.

Are you ready to help shape the future of renewable energy in Aotearoa?

Start your career in Mercury as a Graduate Reservoir Engineer and be part of a team driving the sustainable use of geothermal energy—one of New Zealand’s most valuable natural resources. In this role, you’ll contribute to the performance and longevity of our geothermal reservoirs, helping deliver firm, affordable, and low‑carbon electricity to the national grid.

As the electricity sector faces growing demand for renewable capacity and resilience, your work will support Mercury’s mission to provide reliable energy while protecting the environment. You’ll be guided by experienced engineers and immersed in real-world geothermal operations, gaining hands‑on experience in reservoir modelling, field surveillance, and multidisciplinary collaboration.

This is more than just a graduate role — it’s a chance to make a meaningful impact on the energy transition and help power New Zealand’s future.

Tāu e mahi ai | What you'll be doing :

• Explore and analyse geothermal reservoir data to understand performance and identify opportunities for improvement.
• Support field activities , including downhole logging and reservoir surveillance.
• Collaborate across disciplines , working with geoscientists, drilling engineers, site teams, and optimisation engineers to integrate subsurface data.
• Contribute to planning , helping shape field development strategies and reservoir management plans.
• Build and refine models , assisting in the development of geothermal reservoir simulations.
• Communicate insights , sharing well performance updates with site teams to support safe and efficient operations.
• Grow your skills , participating in structured learning and development tailored to geothermal engineering.
• Work with purpose , contributing to technical reports and compliance documentation that support sustainable resource use.

We’re looking for someone who is :

Mercury is a learning organisation that is committed to providing you with opportunities to grow and develop that will benefit you now and in the future. Part of your role includes building your skillset and mindset through a variety of ways. We believe this creates an energised, innovative and agile work environment where you will feel valued.

Every voice has its place – and together, we thrive.

At Mercury, we believe that having a team of individuals with different backgrounds, experience and capability working together makes us stronger and better as an organisation. We know that some candidates may only apply for a role if they meet all of the criteria. If you want to join our team, we encourage you to apply for any role that matches your skills, capabilities and interests, even if you aren't sure if you meet all of the criteria.

Please click 'apply' to submit your application. If you require accessibility or assistance support from us during the application and selection process, please reach out to

A full position description is available on our Career Page. Applications close Wednesday, 3rd December at 5 : 00pm. Please note that Mercury retains the right to bring a particularly strong candidate through to interview more quickly.

Be careful - Don’t provide your bank or credit card details when applying for jobs. Don't transfer any money or complete suspicious online surveys. If you see something suspicious, report this job ad.

#J-18808-Ljbffr