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 59,500 candidates in the Gas & Vapour modules and thousands more in the Dust, Fuel, Water, Mechanical modules and the Application Design Engineer 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


Refresher Assessment for Ex01-04 Gas & Vapour Updated

Jun 20, 2017

The CompEx Scheme Committee has endorsed the updating of the CompEx Ex01-04 Gas & Vapour Refresher from 6th June 2017 after trialling a pilot at a number of centres during 2017. All CompEx Centres now utilise the new assessment format.

SPE Offshore Europe 5th -8th September 2017

Jul 28, 2017

The CompEx Certification Body Team will be exhibiting at Stand 5C137 at SPE Offshore Europe in Aberdeen on 5th - 8th September 2017.

CompEx Best Practice Conference - April 2017

Apr 21, 2017

The Annual CompEx Best Practice Conference 2017 took place on April 19th & 20th, attended by over 90 delegates from across the CompEx world and from JT Limited, the CompEx Certification Body.