We are one of the UK’s top five family-owned and operated engineering and services businesses.

Delivering outstanding projects throughout the built environment for valued customers across the UK.

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CN Specialist & MEP Specialist for 2020

90% of Our Work is Repeat Business

100% of our clients would recommend us

8.9 out of 10 Project KPI Score

70 Years of Engineering Excellence

News & Social

  • Thanks to @CNplus for sharing our restructure story! https://t.co/RdoyNRxWeG

  • Great coverage from @ConstructionEnq on our Group companies story... https://t.co/OaFwks9cRf

  • HE Simm Creates End to End Solution Through the Integration of its Group Companies

    HE Simm – one of the UK’s leading Mechanical, Electrical & Public Health (MEP) providers – has announced the strengthening of its offering – creating a new Integrated Services division, bringing its fire & security and FM business – HESIS and H&S consultancy – Aspen Thorn, under one ‘group of companies’. HE Simm, HESIS and…

  • HE Simm sweeps the board at Construction News Specialists Awards 2020

    HE Simm, one of the UK’s leading MEP providers, has won the prestigious Construction News Award 2020 for MEP Specialist of the Year and Specialist Contractor of the Year (Turnover over £25m). The categories look at the overall performance of the business and take into account criteria such as a clear strategy and vision, the…