Securidoor (UK) Ltd was incorporated in England & Wales on 10 April 2007, its involved in providing security services in sectors like corporate, residential, retail etc. Apart from these, Securidoor is known for its door supervision, mobile patrolling, alarm response.

Ranked in the top 1% of UK security companies, as approved by the Security Industry Authority, SecuriGroup is an award-winning security company, specializing in the provision of security guarding, augmented security and systems solutions, mobile patrolling and key holding, events security, and close protection services.

SecuriGroup is one of the UK’s leading security companies providing a wide range of security services including manned guarding, retail security, key holding, systems and event security. SecuriGroup Services Limited holds SIA approved contractor status for the provision of Door Supervision, Security Guarding, CCTV, Close Protection and Key Holding.

Securipol Security Services provide alarm response, security guards and security systems such as CCTV, intruder alarms and access control to businesses, private homes and the public sector in Oxford, Banbury, Newbury, Abingdon, Aylesbury, High Wycombe.

Originally founded in Bristol, UK, SECURIST began with an experienced team of individuals with a wide range of backgrounds from within the security industry. Over the course of their time as one of the leading security companies and establishments, they have built up a large client base with many contracts specializing in manned guarding and event security at the very core of their operations in the South West.

Securitas, a market leader in security, with over 280,000 employees, operating in 45 countries. The company offers a wide range of customers in a variety of industries and segments with services like guarding, mobile and monitoring, keyholding & alarm response (both commercial and domestic), mobile patrols, a locks and unlocks service for commercial premises and lone worker protection/escort services.

Security Alliance Limited is a UK based information security services company, founded in 2007 and specializing in the provision of highest quality, award winning security testing and monitoring services. Their security monitoring services provide 24 * 7 protection of clients’ information assets through the continuous monitoring, detection and analysis of security events from over 2000 network devices, servers, applications and databases.

Security Blue Team is a company producing high-quality community events, including CTFs, defensive security operations, and training labs. SBT also offers practical defensive cyber certifications, backed by an Academic Advisory Board comprised of industry experts.

Trusted by governments to supply equipment to apply holograms to secure documents and cards, where and when they are issued. Security Foiling Limited is a manufacturer and solutions provider with unrivalled experience in the document security sector. Founded in 1991 We supply Security hologram equipment and consumables needed to protect your plastic cards and documents against fraud

Security Group is a privately-owned company, based in Bristol and working across south-west of England, specializing in intruder and fire alarm systems that is registered with the Security Systems and Alarms Inspection Board (SSAIB).

Security Management Resources provides researched information to the Security Jobs Network job board on currently available professional level positions within the security industry.

Consultancy and Project Management for Access Control, CCTV and Fire installations in the UK and Western Europe

Security Solutions are one of the UK’s leading manufacturers and installers of perimeter security equipment. With over a decade of experience in the industry the company offers a complete range of services including the design, installation, maintenance and service of new and existing equipment. Security Solutions offer a high quality range of manual and hydraulic or electro-mechanical automatic vehicle barriers.

Security Solutions Wales provides solution for all fire and intruder alarm requirements as well as CCTV and access control.

Security Systems Technology Ltd (SST) is a specialist, independent, security systems integrator with proven expertise in creating bespoke solutions to meet the needs of any business, small or large. As well as being pioneers in cutting edge security solutions like ‘Virtual Turnstile’ (VT) and fully integrated IP Megapixel CCTV surveillance systems, we also specialize in the installation of access control and biometric authentication.

SecurityHQ is a Global MSSP that monitors networks 24/7, to ensure complete visibility and protection against cyber threats. Threats can be both external and internal. Which means that the right combination of tools, skills, people and processes are essential, to proactively and effectively manage, detect and defend environment from all malicious activity.

Seen Services is a globally renowned provider of CCTV systems, access control systems, door entry systems, alarm systems, fire alarms, data networks, electrical components and TV & Satellite services. They provide security, electrical and communication systems for residential properties, industrial and commercial spaces.

Seesy is a disruptive new video-led hiring platform, designed to meet the needs of a new generation of talent and their employers.

Select Electrics Limited was established in 1997 and incorporated on 22nd May 2002. Originally specializing in electrical Installation and maintenance, Select Electrics is a provider of CCTV systems installation, maintenance, and repair with specialist telecommunications and fiber optics expertise.

Select have expanded to become a provider of CCTV systems with expertise in telecommunications and fiber optics networks.

Selex ES is an electronic and information solutions for defense, aerospace, space, security, high-integrity surveillance, network management, information security and mission-essential services. Selex ES undertakes works like control and monitoring of air and maritime traffic, the surveillance and protection of green and blue borders, cyber security, secure communication networks. Selex ES's operates from Italy & UK and has offices worldwide.

Selous Security are a SIA training provider for door supervisor, security guarding and physical intervention.