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Carbon Reduction

Achilles works with organisations to help them establish carbon reduction leadership within their organisations and across their supply chain.

As pressure from Government, investors and customers increase, credible actions need to be taken to tackle to the challenge of carbon and greenhouse gas emissions reduction. Every business should be able to:

  • Measure, manage and reduce greenhouse gas emissions against a credible standard; and
  • Engage with their supply chain to achieve an overall reduction in emissions

Achilles has developed a practical and proven approach to tackling emissions reduction. The approach is founded on three key principles:

  • Robust measurement;
  • Verified reductions; and
  • Collaboration with like-minded organisations





Phone: +44 (0)1235 838188


CEMARS carbon standard

Greenhouse gas certification

Achilles provides the world's leading greenhouse gas certification, CEMARS (Certified Emissions Measurement And Reduction Scheme). CEMARS is the first global greenhouse gas certification standard to be accredited to ISO 14065. It is also approved by the UK Environment Agency as a
Carbon Trust Standard equivalent and an Early Action Metric in the CRC Energy Efficiency Scheme. CEMARS is also a recognised verification standard under the Carbon Disclosure Project (CDP).

CEMARS is recognised in major economies worldwide and can be applied as the common standard across your global operations ensuring consistency of measurement and reduction. The standard is applicable to organisations in all sectors of all sizes.

Achilles provides organisations with guidance, tools, and confidence to measure a greenhouse gas footprint in accordance with ISO 14064-1. The scheme takes an organisation on a journey starting with robust emissions measurement through to credible emissions reduction.

Over 180 organisations globally are demonstrating carbon leadership with CEMARS.

The key benefits of CEMARS

  • Robust measurement aligned with international practice;
  • Verified reductions in carbon emissions to support sustainability claims;
  • Internationally recognised certification in compliance with ISO 14064-1; and
  • Preparation for current and future legislative carbon reporting requirements

Achilles operates CEMARS under licence to carboNZero Holdings, and ISO 14065 accredited certification body, which retains the authority and responsibility for the certification decision.

Supply Chain Carbon

Carbon measurement and reduction in the supply chain

Achilles will drive supplier engagement on carbon measurement and reduction on behalf of an organisation. Achilles has proven success in establishing a collaborative community for buying organisations to share supplier best practices and in engaging with suppliers to encourage a focus on carbon measurement and reduction.

The objective of the supplier engagement is to:

  • Collate data on suppliers' actions on carbon measurement and reductions;
  • Independently verify tonnes of CO2 equivalent emitted by key suppliers; and
  • Focus suppliers on efficiency gains and emissions reduction.

The programme is structured to maximise the benefits of collaboration between an organisation and its suppliers by providing a consistent methodology to carbon measurement and facilitating sharing of best practices and benchmarking. Both the buying organisations and suppliers benefit from the engagement.

Benefits to Buyers

  • Align suppliers with your sustainability and carbon reduction strategies and targets;
  • Gain visibility of carbon related supply chain risk;
  • Meet your sustainable procurement goals; and
  • Collaborate with like-minded organisations.

Benefits to Suppliers

  • Understand how to manage and reduce your carbon emissions;
  • Support claims about your emissions and reduction plans with verified information;
  • Provide the information your Buyers need to make informed purchasing decisions; and
  • Provide data to support your regulatory and sustainability reporting.

Nine of the UK's leading organisations in the Utility sector are collaborating to drive meaningful carbon reduction in their supply chain.


"In addition to granting access to a central platform, key to capturing data, and being recognised as good practice by the industries we work in, CEMARS was a clear choice for us" Romuald Kasensky, Energy and GHG Reduction, Alstom UK

"Having our carbon footprint independently certified illuminates opportunities to cut carbon and cost beyond any purely in-house initiatives. In choosing a standard, Aon was impressed by CEMARS rigorous methodology that was focused on future strategy and initiatives. CEMARS was also the most commercially focused of any standard we saw, so while it has a positive branding impact, we see real commercial impact within our organisation as well" Gregory Lowe, Senior Manager Sustainability, Aon Limited

"CEMARS, and the structure of the certification standard, helped us to get to grips with what to account for with regards to greenhouse gas emissions and how. Measuring carbon emissions can easily spin out of control if you overcomplicate things. Taking a methodical approach and following the CEMARS programme guidance helped to set structure around our measurements and reporting" Adriaan Bekker, Environmental Manager, BCM Construction

"We wanted to be recognised for the great work that we have done to reduce our emissions and gain a certification that qualifies as a CRC Early Action Metric. CEMARS will help us track progress against our plans in future years." Carolyn Thraves, Environmental Management Advisor, Environment Agency. Read the full Environment Agency case study.

"MWH appreciates that the CEMARS programme has empowered our organisation in credibly measuring, managing and reducing our carbon emissions. The assistance and tools offered have assisted in establishing our long term carbon measurement and reporting needs. In addition, it has highlighted the ability to achieve efficiency savings from emission reductions" Alison Bradley, E-A Environment Manager, MWH

"CEMARS is the most robust standard internationally. It demonstrates we are serious about measuring and reducing the Scottish Parliament's impact on the environment"David Fairhurst, Environmental Performance Manager, Scottish Parliament

"For many years we have gathered various pieces of data relating to our carbon emissions, but felt that bringing it all together under an internationally recognised standard, such as CEMARS, would be invaluable" Gareth Edwards, Property Group, Scottish and Southern Energy



Impartiality, independence and integrity

We understand impartiality and commit to providing impartial and transparent verification services for the certification of greenhouse gas assertions. We manage interests that have influence on impartiality and ensure that our certification activities are objective.

We conduct ongoing risk assessments to identify conflicts of interest which are reviewed by our Senior Leadership Team and the Independent Technical Advisory Panel made up of members representing our key interests. Both actual and perceived risks are assessed within a conflict of interests and related parties register. Management actions are implemented to eliminate, manage or minimise conflicts of interest where they exist.

Conflict of interest is further covered through contractually binding agreements to ensure that all our greenhouse gas certification activities are conducted with integrity in an independent and impartial manner. Personnel who are involved in verification and certification activities do not engage in consultancy or technical advice for these clients. We require internal and external personnel to reveal any situation known to them that may expose them or our greenhouse gas certification programme to any conflict of interest.
To provide our clients with confidence in our certification activities, it is essential that our certification decisions are based on objective evidence and that our decisions are not influenced by other interests or other parties.

If you have any concerns or queries regarding a conflict of interest, impartiality, independence or integrity, please contact the programme manager at 

Sign Up

Thank you for your interest in Achilles' carbon reducation programme and CEMARS certification. You may contact a member of the carbonReducation team by emailing or calling 01235838188.

Alternatively, please complete the following information and a member of the team will respond as soon as possible.


We welcome comments, feedback and suggestions that our buyers, suppliers and general public may have that are related to our website, the carbonReduction programme and Certified Emissions Measurement and Reduction Scheme (CEMARS). Your feedback helps us to improve the programme service and guidance we provide to you throughout your subscription.

Should you have any complaints about our verification and certification services, we will work with you to resolve these issues in a timely manner. If we fail to resolve your complaint within an agreed timeframe, you have the right to raise your complaint with us. A complaint may be raised by a client, competitor or other stakeholder about any part of the programme. Please notify the carbonReduction programme manager at

Where your organisation disagrees with a certification decision, we will acknowledge and investigate your concerns. If you are not satisfied with our response, you have the right of appeal to the Certification Manager. A final appeal can be made to the Joint Accreditation Service of Australia and New Zealand (JAS-ANZ) at

Please send your feedback and suggestions to

The Achilles Difference
Achilles acts as an independent partner, providing validated data and insightful analytics to enable buyers across a sector to identify and manage risk, and suppliers to increase market reach while increasing compliance and minimising costs for the network as a whole.

© 2013 Achilles Group Limited