Approved Register Partners

We have developed relationships with leading Approved Register providers, Industry Bodies and other software vendors offering complementary ESOS services. These enable us to provide a range of linked services including training options, and exclusive software discounts.

Please see below for details of organisations we partner with. You will need to contact either us or the partner direct for current discount offer details.

If wish to discuss collaboration options please contact

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CIBSE Certification Ltd.


CIBSE Certification Ltd is one of the first professional bodies to be approved by the Environment Agency to operate a register of ESOS Lead Assessors and already has trained professionals certified as competent to carry out assessments. CIBSE’s major focus is on the energy performance of building and can also provide assessors with experience in other sectors. Organisations can be confident using CIBSE registered Lead Assessors as they have at least two, and typically more than four years, relevant experience in addition to the qualifications they hold.

Become a CIBSE Lead Assessor

ESOS Register

The ESOS Register is an Approved Register for Lead Assessors, regulated by the Environment Agency. As well offering registration for Lead Assessors, we also offer ESOS Training to become a lead assessor.

If you are an energy assessor wishing to become an ESOS Lead Assessor or looking to work with an ESOS Lead Assessor, or a qualifying organisation seeking an ESOS Lead Assessor, then please get in touch with us.

Call us on 01225 326 895 or email

Become an ESOS Register Lead Assessor

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Stroma Certification

Stroma Certification

Stroma Certification is a provider of ESOS Lead Energy Assessor certification. Approved by the Environment Agency to operate a Lead Energy Assessor Register, our scheme provides certification routes for assessors involved in ESOS. You can start today by booking a pre-assessment.

If you are interested in becoming an ESOS Lead Energy Assessor, you can join our scheme by calling our team on 0845 621 11 11 (ext. 603) or by emailing info@qstroma.

Become an Stroma Lead Assessor

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The Energy Mangers Association

EMA (Energy Managers Association)

The EMA is approved by the Environment Agency as an Energy Savings Opportunity Scheme Lead Assessor Register. Their scheme ensures the assessor meets ESOS’s minimum standards as set out in PAS 51215:2014.

ESOS Auditor is taught as part of their training course. It also runs the 1+1 Campaign for which ESOS Auditor is the official compliance tool.

To be included on the EMA Register as a Lead Assessor takes as little as three weeks. Organisations can also group book Lead Assessor training for 6-20 employees.

Become an EMA Lead Assessor

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Energy Deck

Energy Deck

EnergyDeck is a new type of energy and resource management platform that provides organisations with the ability to track and manage all building related performance metrics in a single online system. Users can benchmark buildings to identify savings potential and track the impact of efficiency measures. EnergyDeck provides actionable insights that can be easily shared with internal and external stakeholders.

The IES and EnergyDeck partnership will allow EnergyDeck customers to link the platform with IES’ ESOS Auditor to enable a simpler route to ESOS compliance. They can then manage an ongoing energy efficiency programme by tracking the benefits achieved through implementing energy saving opportunities.

Energy Deck