Our office coverage and customer portfolio.

We currently have twelve UK locations and a training academy for domestic dual fuel engineers. Our dedicated helpdesk staff are based at support centres in Cardiff, Glasgow and Cambridge.

View our locations  ARROW

SMS Plc - Where we operate map

Our customers

We have a broad range of customers due to our unique positioning and end-to-end service offering. We have customers in the following sectors:


  • The top six UK energy suppliers
  • Independent energy suppliers


  • Six major UK house builders
  • Numerous UK-wide private and public property development organisations

Enterprises include:

  • Large supermarket chains
  • Retail chains
  • High street banks
  • Major rail and telecommunication companies¬†