What is the CompEx Scheme?

The CompEx Scheme is the recognised global scheme for the protection of oil, gas and chemical workers in both offshore and onshore activities. The scheme assesses the competency of employees and contract staff who are working in environments with the potential risk of explosive atmospheres. Developed by the Engineering Equipment and Materials Users’ Association (EEMUA) and JT Limited, the CompEx Certification Body is accredited by UKAS to ISO/IEC 17024 : 2012 (See Accreditation).




CompEx is the only Certification Body that offers UKAS accredited certification for personnel who work in explosive atmospheres. This certification validates the core competency of practitioners working in explosive atmospheres. It also offers complete reassurance to employers managing the safety of these potentially hazardous workplaces and can provide the added benefit by assisting employers reduce their insurance costs.


Our success

Since its inception, CompEx has certificated over 64,000 candidates in the Gas & Vapour modules and thousands more in the Dust, Fuel, Water, Mechanical modules and more recently in the Application Design Engineer and Responsible Persons Modules. This has had a direct impact on improved safety in the workplace and a dramatic reduction in injuries caused by dust clouds and explosive blasts.


An overview from Martin Jones - CompEx Operations Manager 


About the Course

The course includes specific knowledge and practical assessments based upon the IEC 60079 Parts 14 & 17 standards. Upon successful completion, candidates receive a CompEx Certificate of Core Competency for the modules in which they have achieved the required standard. Each certificate is valid for a period of 5 years, depending on changes to International, European and British Standards.


 Pre-Course Information

The CompEx Courses benefit from the practical interpretation of the IEC 60079 Part 14 & 17 Standards provided in EEMUA Publication No 186 'A Practitioner's Handbook for potentially explosive atmospheres' available to order from your CompEx Centre or directly from sales@eemua.org details of which are on EEMUA's website https://www.eemua.org/Products/Publications/Print/EEMUA-Publication-186.aspx


CompEx Centres

There is an international network of licensed CompEx centres around the world that develop candidates’ knowledge and provide a robust assessment programme in line with CompEx standards. This network ensures that there is always a centre within reach. See our Centres page for more details.


World Map of CompEx Centre Locations



JT Limited understands the importance of impartiality and potential conflicts of interests in carrying out its certification activities. JT Limited’s full Statement of Impartiality can be found here.

Latest News   View All


Do you want a CompEx Identity Card?

Feb 12, 2018

Visit the ID Cards Page on our website to send an enquiry to the CompEx Centre where you were certificated


Nov 23, 2018

2018 Winners: APEA Milestone Award CompEx / JT Limited - CompEx 25 Years of Improving Safety in Explosive Athospheres

Canary HLE becomes Canada's First CompEx Centre

Nov 17, 2018

CompEx presents at the 6th Global Power Trade Union Congress

Oct 12, 2018

CompEx’s External Quality Assurance Manager, John Harris attended the 6th Global Power Trade Union Congress which he addressed with a presentation on CompEx and workers safety in Hazardous Areas.