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Sustainable action for a better tomorrow

We deliver energy, efficiency, sustainability, and engineering consulting services for businesses across New Zealand, Australia, and the Pacific. Focusing on action we can take today, to make a difference tomorrow.

Partner with Us


We've worked with many of Australasia’s largest companies to achieve significant energy, water savings and carbon emission reductions.


We empower customers to make smart energy and sustainable business decisions.


Greenfield or Brownfield we have the technical expertise you need.

Our Mission

DETA's Energy Mission

Make an Impact


Be part of the solution and partner with us for your energy and sustainability needs.


We focus on identifying and implementing practical and realistic improvements, not creating theoretical reports.


Make an impact - decarbonisation, energy efficiency,  or sustainability strategy, we can help. 

Download our Water Roadmap for your Organisation

Our goal is to partner with you and understand your business. Working together we can make positive long-term impacts on your organisational performance, efficiency and the environment.

Sustainable action for a better tomorrow

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Energy Management

DETA has one of the largest energy management teams in Australasia, with accredited auditors, process heat and refrigeration specialists, and certified measured verification professionals.

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Decarbonisation Roadmapping

DETA are experts in developing carbon strategies and medium to long-term roadmaps, often over 10 to 30 years. These road-maps identify the lowest costs of achieving  reductions and operating in a future carbon market.

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Full Project Delivery Service

Whether you are looking for a full Project Delivery service with an industrial slant, or assistance with part of your project, DETA has the solution. We have the expertise to provide as much support as you require.

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Water & Wastewater Reduction

Water is a critical resource for many of our clients, and using water in the most efficient manner can de-risk business from an operational and consenting perspective. 

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Process Optimisation

Optimising the production or manufacturing process can make a world of difference at an industrial site. But it can often be a challenge to identify exactly which parts of the process need to be tweaked in order to get the plant really humming along. This is where we can help.

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Sustainability Strategy

Knowing where to start to embed ESG reporting or Sustainability strategy and action into an organisation can be a challenge. Our DETA sustainability team has international experience and can help with analysis, planning and implementing a tangible sustainability framework that covers the entire value chain.

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Whatever the industry, our team of engineers & sustainability consultants can help you towards achieving your goals.

We do more than write reports. We partner with our clients to get sustainability initiatives, energy transition pathways, and carbon saving process innovations off the paper and operational. Contact our energy efficiency consultants to find out more.

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