Dennis Johns Service Group

Dennis Johns Service Group is a leading electrical, CCTV, and access control solutions provider based in London, serving a diverse range of clients across the commercial, public, and government sectors. With a legacy spanning over 50 years, initially established in 1975 as Dennis Johns Electrical, we’ve evolved into a trusted partner for projects of all sizes, from small residential installations to large-scale infrastructure upgrades. Our expertise encompasses electrical installation and maintenance, comprehensive CCTV and security systems, and sophisticated access control solutions. We’re proud to have supported critical projects, including securing London during the 2012 Olympics and responding to the 2011 riots, demonstrating our commitment to public safety and resilience. Holding NICEIC and JIB membership for over 25 years and maintaining ISO 9001 certification for 15 years, we prioritize quality, compliance, and customer satisfaction. As a medium-sized enterprise with over 50 employees, we remain dedicated to our founding principles of personal business ethics and delivering excellence. We consistently secure contracts with major construction firms and local authorities, solidifying our reputation for reliability and professionalism. Dennis Johns Service Group is committed to innovation and continuous improvement, ensuring we remain at the forefront of the electrical and security industries.