Energy Savings Opportunity Scheme (ESOS) is a mandatory energy assessment scheme for organisations in the UK that meet the qualification criteria. Organisations that qualify for ESOS must carry out an ESOS assessment every 4 years. These assessments are audits of the energy used by their buildings, industrial processes and transport to identify cost-effective energy saving measures. ESOS assessments must be signed off by an ESOS Lead Energy Assessor (LEA).

More information on ESOS, including the latest qualification criteria, is available on the UK Government website.

Eligibility requirements

ESOS LEA registration is open to Chartered Members and Fellows of IChemE with experience in carrying out energy management and energy auditing activities (typically no less than five years).

How to register

To join IChemE's register of Lead Energy Assessors, Chartered Members or Fellows should attend an ESOS LEA one-day training course and pass the post-course assessment.

Once qualified you’ll need to keep-up-date with your CPD and revalidate your registration each year to remain on the register. For more information visit our CPD pages.

Additional information

• book a place on the next ESOS LEA training course
• view IChemE’s ESOS LEA register
• view more information about ESOS compliance
• learn about CPD requirements for ESOS Lead Energy Assessors
• any questions about our ESOS LEA register can be directed to members@icheme.org.