About us

We are a gas engineering business working in partnership with Cadent to improve the supply of gas to over 14 million people living and working in North London and the East of England, an area covering some 15,500 square miles.

We are a joint venture organisation, owned by Morrison Utility Services and Skanska UK, and specialise in design and construction services for the UK’s gas distribution network – replacing old mains, laying new ones, installing new connections to houses and commercial premises and helping with emergency response services.

Employing over 3,000 people and generating a turnover in excess of £200 million a year, we are the largest single contractor in the UK’s gas distribution network.

At the end of the day, though, the work we do is not just about engineering and numbers – it’s about improving the quality of people’s lives. Our aim is to ensure we provide the best possible service to our customers and keep them safe and warm for decades to come.

Work with us – build a great career

As a progressive, innovative business, tRIIO is always interested to hear from people looking to develop their careers in the gas engineering world. We also regularly welcome people who are just starting their careers or who are looking for a career change.



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Contact us

Our recruitment team is here to help with enquiries about any accessibility and technical issues.


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Technical queries

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Information for recruitment agencies

We are not currently looking to extend our preferred supplier list (PSL) of recruitment agencies.
If you’re a recruitment agency sending a speculative CV or details of a potential candidate, tRIIO will not be subject to any recruitment fees.

If you don’t spot anything specific on our website, please create a profile and register for job alerts. We also encourage you to visit our careers website regularly to keep up to date with our opportunities.