Our clients

Forward-thinking organisations we're proud to serve

Partnership success

With a proven track record across private and public sectors, we work alongside organisations that value sustainability as a core part of their identity and future growth.

Our approach is multi-faceted, designed to support both high-level strategic vision and on-the-ground execution. By engaging with board members and executive leaders, we help develop holistic, cost-saving carbon strategies that align with organisational priorities.

Simultaneously, we work closely with in-house technical teams, providing hands-on support to implement decarbonisation plans that are customised, measurable and effective. This dual approach ensures that our customers experience reduced overhead costs, improved operational efficiencies, and enhanced sustainability credentials, positioning them as leaders in environmental responsibility.

Helping organisations power a sustainable future

Our clients

woodbridge high school logo
Gregory Distribution logo
Connexus logo
woodbridge high school logo
Gregory Distribution logo
Connexus logo
woodbridge high school logo
Gregory Distribution logo
Connexus logo
woodbridge high school logo
Gregory Distribution logo
Connexus logo
“The heat decarbonisation plan programme has helped us achieve a starting point to drive our sustainability policy and to understand opportunities to reduce consumption and costs as we look towards our net zero journey. The work has placed us in a much stronger position to bid for future grant funding rounds to support the installation of energy efficiency works. The output of the detailed surveys was to a very high standard and the team were extremely helpful throughout the process, providing excellent communication that ensured we achieved key Salix milestones.”

James Fenlon
Head Of Estates And Health And Safety
Thinking Schools Academy Trust

The Bank of China appointed Zenergi to manage its environmental compliance and strategy towards net zero. Their approach to measure, prepare and deliver by breaking down the process into milestones and targets has allowed us to simply monitor where we are in the journey, giving us confidence that the work is being completed in a timescale which meets our global targets. Aligning net zero with SECR and ESOS further strengthens our reporting strategy using the same data set throughout, expanding upon our voluntary emissions, and going beyond the minimum requirements. Zenergi have responded extremely well to requests for global sustainability support resulting in additional kudos from our peers. Zenergi have met our expectations to date, and we look forward to future steps being managed by the sustainability team.

Steven Lee
Deputy Head of General Administration
Bank of China

Aldermore Bank has committed to achieving operational net zero by 2030, with targeted reductions measured across 14 of the Scope 3 categories. Zenergi was instructed to work alongside our internal teams to complete our strategy, underpinned by their specialist sustainability and engineering teams to fulfil our net zero goals and aspirations. Working with an expert partner has allowed us to move forward with confidence and we have already started to bring together a focused structure and plan to deliver our milestones. We would highly recommend Zenergi and their Measure, Prepare, and Deliver approach towards net zero.

Tom Harding
Head of ESG & Sustainability
Aldermore Bank

“Zenergi provided peace of mind that our Trust was compliant with the new carbon reporting requirements of SECR. The support meant we didn’t have to worry about the complexity of the data gathering or understanding what needed to be included in the report. The team was really easy to work with and took the pain away of needing to comply. For a large Trust like ours it is also really helpful to be able to turn to Zenergi for a joined up approach to all things energy from an organisation that has taken the time to understand us and our needs.”

Robert Kennington
Director of Finance & Business
The Constellation Trust

“We are a 7-school / 8-site trust based in Coventry and have used Zenergi for our energy procurement for over five years. I find their service to be excellent and pricing very competitive. They have helped us co-ordinate our utility end dates for easier procurement in the future. At the last tender, the Directors asked for a second tender from a competitive broker to ensure that Zenergi was offering the cheapest solution. This was undertaken and the Zenergi contracts were lower priced than the competitive tender. Their online portal is also a good resource.”

Martyn Alcott FISBL
Chief Finance and Operating Officer
Holy Cross Catholic MAC

Ready to strengthen your organisation’s energy strategy?

Whether you’re focused on cost, compliance, carbon or operational performance, our experts are here to support your next step.

Our expertise

Client success stories

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How we helped Danes Educational Trust unlock £166,000 for carbon reduction.

How we helped Danes Educational Trust secure £166,000 for carbon reduction.

Phase 2 LCSF grant awarded
£
39,000

Keeping energy costs under control for MK2 Real Estate

Discover how strategic procurement and ongoing oversight supports a growing property portfolio.

Mark Leonard

Strategic Client Partner

Zenergi

Uncovering potential energy savings of 26% for East Sussex County Council

Discover how we identified potential annual savings of more than £52,000 for a progressive Local Authority with ambitious net zero targets

Identified energy savings
1,042,371 kWh
Identified cost savings
£52,567
Identified carbon savings
194
tCO2e

ESOS audit identifies £4 million in cost savings.

Explore how our ESOS Phase 3 audit uncovered a 5% energy reduction and a two-year ROI for a FTSE 250 food and drink manufacturer.

Energy reduction
33,093 MWh
Cost savings
£4.1 million
Carbon reduction
6,219
tCO2e

Annual saving of £61,000+ and immediate ROI from TM44 A/C Inspection.

Discover how a global data centre accessed major operational savings and maintained compliance.

Saving from cleaning the chillers
£
40,000+
Saving from adjusting the schedules
£
21,000+
Saving from upgrading the chillers
£
337,000+

Unlocking £5 million in savings with ESOS compliance

How a global renewable energy leader turned ESOS into a strategic opportunity for efficiency and sustainability.

Energy savings
26,000,000 kWh
Carbon reduction
8,300 tCO₂e
Cost savings
£4.91 million

Powering a historic dining hall for St John’s School.

Our Siteworks team streamlined a complex meter installation to meet ambitious timescales and ensure a new dining hall opened on time.

Karina Joshi

Strategic Customer Success Manager

St John's School Customer Success Manager

Bill Validation case study for independent school

How one conversation led to a £107,000 refund for a leading independent boarding school

Billy Pryke

Strategic Customer Success Manager

How our energy audit identified savings of £50,000 for E-ACT.

Discover how our exciting new programme for Multi-Academy Trust, E-ACT, identified huge carbon and cost savings in just six months.

Identified energy savings
246,193
kWh
Identified carbon savings
48.16
tCO2e
Identified cost savings
£
50,114

Greener transport: helping Gregory Group meet ambitious goals.

A science-led partnership with one of the UK’s largest transport groups that led to impressive net zero acceleration.

Harry Eaves

Senior Energy Consultant

Zenergi

Discover how our energy audits highlighted £94,955 of annual savings for Aldermore Bank.

We’re helping Aldermore Bank to reduce carbon emissions and cut costs – all while keeping the bank’s net zero strategy firmly on track.

Total carbon saving
172.6
tCO2e
Total annual cost saving
£
94,955
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