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Mace Consult launched as a new and independent business on 5 March 2026, through a carve-out from Mace Group. Mace Consult and Mace Construct operate as two independent businesses. Information, references and materials on this website may represent operations prior to this separation. Go to Mace Construct here.

Nuclear Decommissioning Authority (NDA) Group Wide Energy Programme (GWEP)

Accelerating low carbon transition

Supporting the NDA’s journey to net zero

Upward view from inside a large industrial cooling tower, showing red and steel infrastructure rising toward a circular opening where steam vents into the sky above.

Key takeaways

30,000

tCO2e potential emissions savings per year

~£16

million potential financial savings per year

50

projects analysed and prioritised

  • Identification of significant emissions and cost savings through the development and submission of an Energy Demand Optimisation Report
  • Provision of well-evidenced business cases and long term-roadmaps for energy efficiency, ensuring on-site resources are directed effectively
  • Delivered carbon modelling for several decarbonisation scenarios out towards 2050 and beyond, highlighting the risk associated with everchanging decarbonisation pathways  

Mace Consult supported the NDA in the co-ordination and delivery of energy efficiency projects across its estate. The purpose of this work was to provide the NDA with a clear basis for targeting future investigations, ensuring that on-site resources are directed where they can deliver the greatest impact. The key outcome of this work together was the development and submission of an Energy Demand and Optimisation Report that provided priority opportunities for energy and carbon reduction.

Our team identified and prioritised opportunities from each of the Operating Companies (OpCos). A structured down-selection process was undertaken involving a series of workshops through which projects were assessed against a set of critical success factors. Mace undertook significant data analysis which was focused on cost-effectiveness and carbon reduction potential. This approach enabled the identification of key energy efficiency initiatives across the estate which were then actioned by the OpCos.

A significant finding from the analysis, was that ventilation systems account for approximately 75% of electricity consumption across sites, greatly improving NDAs depth and accuracy of understanding. As a result, the recommended priority areas included steam system optimisation, ventilation upgrades, fleet management, off-site accommodation optimisation and heat decarbonisation.

As a result of our partnership the project was shortlisted for two major industry awards: Net Zero Strategy of the Year at the Green Business Awards, and Sustainability Project of the Year from the Projects Control Expo.  

Your questions answered

What was the objective of this project?
Mace Consult supported the Nuclear Decommissioning Authority (NDA) to identify and prioritise opportunities for energy and carbon reduction across its estate. The goal was to provide a clear basis for future investment and direct resources towards the initiatives that could deliver the greatest impact.
What did Mace Consult deliver for the NDA?
Mace Consult developed and submitted an Energy Demand Optimisation Report, identifying priority opportunities for energy efficiency, carbon reduction and cost savings. The report provided evidence-based recommendations to support future decision-making and investment planning.
How does Mace Consult identify opportunities for energy and carbon reduction?

Mace Consult combines detailed data analysis with stakeholder engagement and structured assessment frameworks. This approach helps organisations identify, prioritise and implement initiatives based on carbon reduction potential, cost effectiveness and strategic objectives.

How does Mace Consult support long-term decarbonisation planning?

Mace Consult develops robust business cases, decarbonisation roadmaps and carbon models that help organisations understand future risks, assess different pathways and make informed investment decisions through to 2050 and beyond.

How can data improve energy efficiency outcomes?

Data-led analysis provides a clearer understanding of how energy is consumed across an organisation's estate. This enables resources to be focused on the areas with the greatest opportunity for energy savings, carbon reduction and operational improvement.

How does Mace Consult help clients achieve sustainability objectives?

Mace Consult combines sustainability expertise, technical analysis and strategic planning to help organisations reduce emissions, improve energy efficiency and develop practical pathways towards their net zero ambitions.

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Mace Consult and Mace Group are now two independent businesses.

In 2025, a majority investment in Mace Consult by Private Equity at Goldman Sachs Alternatives was announced through a demerger from Mace Group.

This completed on 5 March 2026, with Mace Consult and Mace Group (which includes Mace Construct) now independent businesses. To continue, please choose whether you want to explore Mace Consult or Mace Construct.