• About

    Circle Green is one of the UK’s leading independent names in the world of commercial energy, water and management systems services in both private and public sectors. With a combined experience of over 30 years and a team of highly experienced professionals, we continue to be proud of helping our clients manage risk whilst achieving profitable sustainability with our "one-team" approach.


    Our business activities are undertaken with passion and commitment as well as the highest business integrity and professionalism as expected by our clients. We treat your challenges as our own and are proud to support the efficient operation of any business through trusted long term relationships.


    Circle Green provides value through process-driven energy and water management, strategically delivered under contract as a bespoke managed service.


    We align internationally recognised management systems and standards with our bespoke energy and water managed services to provide comfort in the fact that our unique structured approach delivers results. This means that we focus on our strengths allowing you to focus on what is important to you…


    Your Core Business.

  • Our Unique Approach

    Circle Green Corporate Presentation Video

  • The Energy Circle

    The Energy Circle by Circle Green is a continuous visual of best practice for the management of energy and water. This is all underpinned by process, strategy, big data and analytics.


    This process-driven approach has been developed to ensure excellence in delivery of our strategic managed services.

  • Energy & Water Management

    • Reduction Strategies
    • Resilience Assessments
    • Certified Energy Management
    • ESOS Lead  Assessor
    • Utility Connections
    • Mandatory Carbon Reporting

    Performance Management

    • Estate Optimisation
    • Stakeholder Engagement
    • Behavioural Change Programmes
    • Bespoke Training Modules
    • On-line Education Portal
    • Continuous Performance Improvement

    Embedded Standardization

    • Unified Management Systems
    • ISO 9001:2015 - Quality Management
    • ISO 50001:2011 - Energy Management
    • ISO 50015:2014 - Measurement & Verification
    • ISO 44001:2017 - Collaborative Working
    • ISO 14001:2015 - Environmental Management
    • Transitioning & Annex SL

    Big Data & Advanced Analytics

    • Analytics & Interrogation
    • Benchmarking
    • Financial & Consumption Reporting
    • Intelligent alerts
    • Sub-Metering
    • Real-Time Data access
    • Bill Validation
    • Market Trends and Analysis
    • Integrated Building Connectivity

    Capital Projects

    • Capital Project Procurement Planning
    • Project Procurement Support
    • Tender Process Management
    • Funding Analysis
    • Power Purchase Agreements
    • Supplier and Project Management
    • Measurement & Verification IPMVP and ISO 50015:2014
    • Water Performance Contracting
    • New Build Energy Efficiency Assessments

    Technology & Innovation

    • On-site Generation Technologies
    • Renewable Generation
    • Demand/Dynamic Response
    • Smart Building Systems
    • Emerging Technology Research
    • Battery Storage
    • Future Thinking

  • Clients

    Circle Green provides services to a variety of markets.

    The following is a snapshot of some of the industries that we are proud to serve…

    Airports & Aviation

    IT & Telecoms

    Hotels & Leisure


    Process & Production

    Local Government



  • Values


    “ At Circle Green, we focus on solving challenges faced by our clients.
    We develop sustainable, impartial and ethical outsourced solutions to address
    energy, carbon and water issues, improve business efficiency and
    lower emissions for the benefit of our clients, stakeholders and the

    Ian Porter CEO

    Our Commitments to our Clients, Colleagues, and Partners...

  • Leadership Team

    Our mission is to enable large users of energy and water achieve profitable sustainability in their low carbon journey

    Ian Porter

    Chief Executive Officer

    CEO and founder of Circle Green, responsible for the running of the business, sales and finance.


    Ian is passionate about sustainability through innovation and has seen great success in helping many clients meet and exceed their energy targets in a variety of markets in both public and private sectors, whilst ensuring key stake holders realise a positive impact on their bottom line.

    He has extensive working knowledge around energy performance contracting, smart grid technologies, de-centralised generation, carbon legislation, and Data Centre efficiency and understands the challenges that businesses face around meeting their sustainability targets.


    Ian is a father of two and enjoys his family time outside of work. He also has a passion for photography, enjoys walking and is a National Trust life member.


    Stuart Kirk


    Chief Operating Officer

    Stuart is COO of Circle Green and is also vice chair of the Energy Managers Association.


    Since 2010, Stuart has been focused on all aspects of energy and carbon management, using his in depth expertise of building services construction and operational maintenance to develop corporate strategies to reduce energy consumption and carbon emissions through life cycle analysis.


    Previous roles include Head of Energy for Wm Morrison Supermarkets plc, Director of Building Services at Rex Proctor & Partners and Regional Commercial Manager for a Balfour Beatty Company, providing facilities management services to the Royal Mail and BT Estates. Whilst at Morrisons, Stuart engaged with both management and plc board members, developing a carbon reduction strategy to meet their 2020 target and manage, develop and deploy a multi-million pound energy reduction programme across a £6b property estate.


    Stuart has expert knowledge of renewable energy deployment, energy efficiency technology and carbon reduction programming, developing and delivering courses for the RICS and informing corporate stakeholders and shareholders. Stuart is a chartered surveyor and an ESOS lead assessor, with a degree in quantity surveying to support the analysis of building services.


    Stuart is driven to reduce energy consumption for clients, focusing on removing wasted consumption and driving efficiency into operations. He has a clear belief that obtaining knowledge of the estate, engaging maintenance services, optimising existing assets and challenging operations delivers significant benefits to clients.


    Gareth Dauley

    Chief Commercial Officer

    CTO of Circle Green, responsible for sales, technology and innovation.


    A dynamic, entrepreneurial strategist with International Smart Grid, Demand Response, MDM (Meter Data Management), (VPP) Virtual Power Plants, IOT (Internet of Things), M2M (Machine to Machine) and Smart Cities experience. Demonstrating success by driving high value growth while providing leadership in highly competitive markets.

    With a passion for energy and the Energy IOT to identify and align clients emerging technology needs with products and services. Excelling in driving growth of company revenues and improving performance.


    Keith Hamlyn

    Chairman & Director of Quality

    Fellow of the Chartered Quality Institute with wide practical experience in the design, development and implementation of Quality management systems in the manufacturing and service sectors.
    Chartered Quality professional
    Physicist with extensive experience in the engineering, manufacturing and service sectors. Honours degree in the teaching of physics.

    IRCA Registered Lead QMS Auditor of ISO 9000 Quality systems. IRCA Registered OHSAS Auditor. Ex-Associate Environmental Auditor. Accredited BS11000 Facilitator.
    NEBOSH Qualified for Construction with credit

    Lead Tutor who presented courses in Quality and Environmental Management in seventeen countries around the world.

  • Enquiries

    For more information, contact Circle Green today

  • Join our business

    If you are interested in joining our team, please get in touch.

    We're always on the look out for fresh talent.

  • News & Events

  • Videos

    Below is a selection of our most recent videos

    Circle Green CEO Interviewed at EMEX, London 2016

    Filmed at EMEX 2016 in London, Circle Green CEO, Ian Porter talks to Brian Shillibeer from TWinFM about strategic energy management

    Circle Green Corporate Overview Presentation Video

    An overview of how Circle Green enables clients to achieve profitable sustainability through strategic, outsourced energy management

  • Locations

    Circle Green Energy Services Limited

    Head Office

    78 York Street


    W1H 1DP

    Circle Green Energy Services Limited

    Support Centre

    1st Floor

    Barclays House

    Gatehouse Way


    HP19 8DB

    Circle Green Energy Services Limited

    Northern Regional Office

    Bay House
    West Yorkshire
    BD17 6BY

  • Circle Green Corporate Overview 2017

    Download Brochure

    Click on the button below to download our 2017 corporate overview

  • Energy


    Royal Institute of Chartered Surveyors



All Posts

Terms and Conditions ("Terms")
Last updated: April 04, 2016

Please read these Terms and Conditions ("Terms", "Terms and Conditions") carefully before using the www.circlegreen.co.uk website (the "Service") operated by Circle Green Energy Services Limited ("us", "we", or "our").

Your access to and use of the Service is conditioned on your acceptance of and compliance with these Terms. These Terms apply to all visitors, users and others who access or use the Service.

By accessing or using the Service you agree to be bound by these Terms. If you disagree with any part of the terms then you may not access the Service.

Links To Other Web Sites

Our Service may contain links to third-party web sites or services that are not owned or controlled by Circle Green Energy Services Limited.

Circle Green Energy Services Limited has no control over, and assumes no responsibility for, the content, privacy policies, or practices of any third party web sites or services. You further acknowledge and agree that Circle Green Energy Services Limited shall not be responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with use of or reliance on any such content, goods or services available on or through any such web sites or services.

We strongly advise you to read the terms and conditions and privacy policies of any third-party web sites or services that you visit.


We may terminate or suspend access to our Service immediately, without prior notice or liability, for any reason whatsoever, including without limitation if you breach the Terms.

All provisions of the Terms which by their nature should survive termination shall survive termination, including, without limitation, ownership provisions, warranty disclaimers, indemnity and limitations of liability.

Governing Law

These Terms shall be governed and construed in accordance with the laws of United Kingdom, without regard to its conflict of law provisions.

Our failure to enforce any right or provision of these Terms will not be considered a waiver of those rights. If any provision of these Terms is held to be invalid or unenforceable by a court, the remaining provisions of these Terms will remain in effect. These Terms constitute the entire agreement between us regarding our Service, and supersede and replace any prior agreements we might have between us regarding the Service.


We reserve the right, at our sole discretion, to modify or replace these Terms at any time. If a revision is material we will try to provide at least 15 days notice prior to any new terms taking effect. What constitutes a material change will be determined at our sole discretion.

By continuing to access or use our Service after those revisions become effective, you agree to be bound by the revised terms. If you do not agree to the new terms, please stop using the Service.

Contact Us
If you have any questions about these Terms, please contact us.