JH Mechanical Services is a member of the following organisations:


Gas Safe Register is the official gas registration body for the United Kingdom, appointed by the Health and Safety Authority for each area. By law all gas engineers must be on the Gas Safe Register
The National Inspection Council for Electrical Installation Contracting is one of several organisations which regulates the training and work of electrical enterprises in the UK.
WIAPS is funded by sixteen Water Suppliers to administer an approved plumbers’ scheme for them. To become a WIAPS member, applicants have to demonstrate that they have been suitably trained as a plumber, that they have adequate knowledge of the water regulations by passing an assessment and they must be able to confirm that they have appropriate insurance cover. We are also a member of WaterSafe, which is an online directory and national accreditation body for competent and qualified plumbers in England, Scotland, Wales and Northern Ireland.
F-Gas Register are appointed by DEFRA to provide Government-approved company & sole trader F-Gas certification for companies or individuals based in England, Scotland, Ireland & Wales as appointed by the 2015 no310 UK Fluorinated Greenhouse Gases Regulations. F-Gas company & sole trader certification is an EU wide regulation.
The Contractors Health and Safety Assessment Scheme was created by experienced health and safety professionals in 1997 to improve health and safety standards across the UK.

Construction line is a register for pre-qualified contractors and consultants used by the construction industry in the UK.