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Meet our team

The Green Consultancy comprises a team of people passionate about helping clients find the most cost-effective ways to reduce their energy consumption, carbon emissions and other environmental impacts. In all aspects of our work, we aim to exceed expectations and deliver outcomes that are greater than our clients thought possible.

Put us to the test NOW!  To discuss your requirements please call John Treble on 01761 419081 or email John@GreenConsultancy.com

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John Treble BA MSc

Founder and Client Services Director

John founded The Green Consultancy in 1992.  He is passionate about sustainability and correctly applying physics to reducing energy consumption and carbon emissions. Lancaster University Alumni Profile

“John is a true expert on energy management and energy efficiency. He has a no-nonsense grasp on best practices. If you want independent expertise to sound out your energy efficiency plans then he’s well worth contacting.” 
Simon Brown, Managing Director, 2degrees Solutions.

“John puts clients at the forefront of all business decisions and is tenacious in ensuring that they get what they need. He is honest and straightforward with high and exacting standards.” 
Heather Marchant, Former Carbon Trust Team Leader.

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Jes Rutter

Managing Director

As Managing Director of JRP Solutions Ltd, the parent company of The Green Consultancy since July 2017, Jes is a recognised UK expert on improving energy efficiency.

He has over 30 years’ experience in the energy management sector much of which has focused upon the analysis, effectiveness and improvement of energy generation and utilisation.

His expertise has been successfully used to develop and implement practical solutions for and on behalf of numerous blue-chip multi-national businesses. He helped a global power systems manufacturer to implement facilities management and energy solutions valued at £60M per annum and reduced its energy consumption by over 30% whilst production increased by 40%.


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Carol Somper BSc MSc

Associate Director, Corporate Sustainability

Carol has extensive experience, in both the public and private sectors, of delivering consultancy and training in: corporate strategic review and non-financial performance, environmental auditing, carbon management plans, sustainable procurement, sustainable design and construction, materials management, waste prevention, low carbon transport, BREEAM and various environmental ISO and other standards.

Our consultants

We have over 20 consultants with decades of relevant experience and all the appropriate qualifications and accreditations. Collectively they cover all aspects of energy, carbon and environmental management in the public and private sectors. Their CVs are available on request.

Put us to the test NOW!  To discuss your requirements please call John Treble on 01761 419081 or email John@GreenConsultancy.com

John Treble

Put us to the test NOW!

For over twenty five years we have been delivering superior outcomes for thousands of commercial, industrial and public-sector clients.

You need not take our word for it – hundreds of their comments are at the foot of these pages.

To discuss your requirements please call John Treble on 01761 419081 or email


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Greatest savings for lowest cost

At the heart of our services is our unique rigorous and scientific energy efficiency methodology - guaranteeing you exceptional value for money.

More about our energy efficiency methodology

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Total Energy Management

To help you manage energy in the most complete and professional way possible, The Green Consultancy provides a comprehensive integrated range of services.

More about Total Energy Management