Experience and Reputation

Dennis Johns Service Group has 40 years’ experience of electrical solutions, delivered by highly qualified engineers. Over time, our reputation has grown and is reflected in the large clients that prefer to use us. Dennis Johns Service Group is the preferred supplier to many London Boroughs and national commercial construction organisations.


The reason our reputation has grown over the last 40 years is because we continually develop the technology we use to find the right solutions for each of our clients’ challenges. Our leading edge CCTV technology and bespoke Access Control systems have resulted in safer places to live and work for the people who use them. We are proud of that.

Key Performance Indicators

Our experience of working in partnership with Local Authorities means that we understand the need to document and meet response times, to ensure compliance and Project Management best practices are prioritised and that everything is correctly procured, documented and reported.

The reputation of our commercial clients depends on us delivering competitive solutions on time, every time.

At the heart of Dennis Johns Service Group is our enthusiasm for new technology, competitive service and the continued professional development of our teams.