Denning Electronics has solved big communications, protection, and surveillance problems by providing sales and technical support to distributors, security system integrators, engineering design firms, architects, and system users. Their specialties include outdoor intrusion detection, video and audio surveillance, video/audio/data networks and transmission, access control, and ballistic/blast/chemical/acoustic barriers.

Department for Energy Security and Net Zero (DESNZ) is focused on the energy portfolio from the former Department for Business, Energy and Industrial Strategy (BEIS), in the United Kingdom (UK) government.

Positioning the UK at the forefront of global scientific and technological advancement. Focusing on stronger growth, better jobs, and bold discoveries.

DeterTech is an award-winning risk management company that uses proprietary technology-based solutions to deliver material cost savings for clients operating nationally in the infrastructure, construction, vacant property, and other sectors, across a range of security products and services.

Through their 24/7 Security Operations Centre, DigitalXRAID delivers cyber security strategies to organisations that enhance the security posture and reduce the risk, cost, and reputational damage of a breach.

Direct Trade Supplies supplies consumer units, CCTV, heating, timers, low energy LEDs, lighting, access control systems, fire protection systems & lots more from top manufacturers.

Domo Tactical Communications Broadcast is a global MNC engaged in the development, delivery and support of high-tech video surveillance, IP Mesh, Covert Audio and Video, integrated surveillance, maritime security and robotics solutions.

Dragonfly Aerospace is an industry leader in world-class, high-performance imaging satellites and payloads. Their turnkey solutions get these strategic assets operational on orbit with the minimum time, cost, and risk. Their imaging solutions enable our customers to create persistent views of the Earth in a wide range of spectrums for unprecedented business intelligence that helps improve the lives of people around the world.

DS Security is a pioneer UK Security company providing Security Services throughout the United Kingdom. Their security camera systems, access control and asset protection solutions provide a real deterrent and the peace of mind having a full record of any event or problem if needed.

Operating throughout the UK and Europe, DSB provides security for a full range of requirements, including door personnel, retail security and close protection security operatives. They also supply security equipments.

DSX-Europe is a UK company based in Manchester. The company specialises in distribution of the DSX Access Systems. DSX-Europe offers hardware, software as well as biometrics solutions of DSX Access Systems. With over 75 years of experience in electronic security industry, DSX-Europe's staff are well equipped to help customers with any Access Control requirements.

Dynamark Monitoring, Inc.'s mission is to save lives and protect assets. To achieve this goal, they are always seeking to improve their technology, invest in their people, and strengthen the relationships with their customers. They have been protecting people and assets nationwide since 1972, and they are determined to change the alarm monitoring industry for the better.

e.Norman Security Systems, Inc. (eNSS) provides a single source for integrated electronic security products and services in the Chicagoland and NW Indiana area. Their mission is to provide the highest quality of professional design, installation, and service, thereby making a substantial contribution to our industry by promoting such inherent values.

ECHO is an alarm transfer service provider facilitating greater effectiveness in police response to emergency alarms. It’s fully automated electronic alarm transmission service between alarm receiving centres (ARCs) and the police means when ARCs identify and verify an alarm from a monitored installation the alarm signal can be transferred to the police control room in an instant via ECHO.

Edwards Electronic Systems, Inc. design, inspect, install and service life safety and security systems, including fire alarm systems, security systems, nurse calls, CCTV, area rescue, card access and sound intercom systems.

EET Group is a value adding niche IT distributor, providing suppliers and customers with expert industry knowledge, intelligent logistics solutions, unique sales service and smart marketing tools.

Eirsec CCTV is a Ireland based online CCTV store. The company offers complete CCTV systems, DVRs, night vision cameras, PTZ domes, CCTV lenses, covert cameras, CCTV monitors, cables and power supplies, brackets, housings, CCTV accessories, etc.

Eldes JSC is an experienced global competitor in alarm and security products, GSM, M2M monitoring and remote control solutions. The company was established in Lithuania in 2005 with a strong emphasis on research & development.

ECHO operates to fullfil Bluelight Services interest in speeding up the police response to verified alarm activations through the use of digital automated alarm transmission technology. Its digital communications hub provides an automatic transfer to police control rooms of confirmed intruder and hold-up alarm activations, faster alarm verification, accurate incident information, and automated event incident acknowledgment.

Electronic Security Installations Ltd is a specialist security installation company. The company's clients include private homes, shops, large offices, industrial sites, schools and medical units. ESI is accredited by the Security Systems Alarms Inspection Board (SSAIB) for installing and servicing intruder alarms. Based in the North West Electronic Security Installations cover Cheshire, Derbyshire, Greater Manchester and all surrounding areas.