SGS Baseefa a certification body for electrical and mechanical equipment intended for installation and use in potentially explosive atmospheres. The company is accredited by the United Kingdom Accreditation Service (UKAS).

SGW Security Consulting has been providing independent security risk management and security engineering consultancy services. Based in Edwinstowe, the company's team of independent multi-disciplined Consulting Engineers, Fire Safety Engineers and Security Consultants, CCTV Consultants and Project Managers, specialising in securing the Built Environment. SGW recommend security measures that address risk, protecting people, property, and assets.

SHENZHEN SAFE GUARD CO.,LTD was founded in 1999, which is a leading global technology manufacturer specializing in wireless microwave video and data communication system for government, law enforcement, military, defense, UAV/UGV and broadcast markets, etc. “COFDM” Great topology communication 1. Full duplex video/data wireless transmission 2. Large data through for both video & data link 3. Point to multipoint telecommunication 4. Robust video

Shirod Global Resources Nigerian Limited is a supplier of computer accessories, installation of IP, CCTV cameras, fire alarm system, perimeter fencing, installation of access control systems, software development, consultation etc.

Shiver Security Systems, Inc. has provided integrated security solutions, access control, video (CCTV), and fire protection for thousands of customers in southwest Ohio and Northern Kentucky since 1971. Products and services offered include Sonitrol audio verification intrusion detection systems, access control systems, CCTV systems, fire detection systems, and external industrial monitoring functions.

From factory automation to logistics automation and process automation, SICK’s sensor solutions are keeping the industry moving. As a technology and market pioneer, SICK provides sensor intelligence and application solutions that create the perfect basis for controlling processes securely and efficiently, protecting individuals from accidents, and preventing damage to the environment.

Siete24 offers nationwide coverage and security schemes designed according to the needs of each client and according to the economic sector to which it belongs. Siete24 poses a 24x7 monitoring of all activities and movements in the different branches through CCTV, alarm monitoring, access control, GPS tracking, home automation, inmotic, sensors and biometrics.

Sigma - integrated systems (Sigma-IS) was established in 1991. The company deals in development, manufacturing, installation and setting-up of access control and management devices, of integrated systems of guard-alarm and fire-alarm, of scheduling and peripheral equipment remote control, and also of local optical fiber networks.

Sigma Engineered Solutions Ltd is a provider of fire & security systems such as access control, door entry, CCTV, intruder alarms & fire alarms. The company serves both domestic & commercial markets. Sigma Engineered Solutions Ltd installs and provides maintenance of burglar alarms & monitoring, photo ID system, fire alarm system as well as building management system.

Sigma Fire & Security designs, develops, manufactures & distributes a range of specialist fire and security products. Sigma Fire & Security is the latest division of Evac+Chair International. Some of Sigma’s trusted key partners include GfS Germany and Vimpex UK.

Silico envisions a world where every decision is simulated, prior to being made in the real world. Silico is the leading provider of process simulation software, working with enterprises from any sector to transform their decision-making in as little as four weeks. The Silico platform is an end-to-end solution that enables businesses to create digital twins of any business or process quickly and easily.

Supply, installation, repair and maintenance of CCTV Cameras, PC-based DVR, digital video recorder, mobile Vehicle DVRs, NVRs. They also supply, install, repair and maintain burglar alarms, fire alarms, automatic gates/garage, biometric/face recognition/ access controls.

SIMON TECHNOLOGIES AE has been offering complete Communication and Security system solutions for over 25 years. Official partner of the largest manufacturers in the world combines technological innovation with comprehensive support.

Simpli Security is a UK based online retailer offering a huge range of security products including intruder alarm systems, CCTV cameras, money counters, safes, convex mirrors, traffic mirrors, metal sheds, storage sheds, bike storage, safety mirrors, barriers, car park barriers, bollards, bike racks, crowd/ queue control and much more.

Sintal Concern can boast as the biggest security corporation in Slovenia. The company’s simple guiding principle: “Your safety is our concern“, fully takes into account the requests and suggestions of our clients. Be it security systems, physical security, fire prevention, bodyguard services, Sintal offers the widest range of security services in Slovenia. Sintal's main principle is providing quality in security.

Siralab Robotics is an Italian company pioneer in the production of UAS of the mini-micro class. They provide state-of-the-art unmanned aircraft systems for homeland security applications.

Sirix offers integrators around the world with remote security solutions like remote video surveillance, perimeter control, and remote control of specialized equipment. It also offers efficient solutions that specifically meet the protection, logistic support, and coordination needs of companies. Sirix also designs custom operational infrastructure for companies that require the centralization of information in real-time.

SIS International SA imports, distributes and offers support for over 16 years in Romania for a wide range of equipment, SCADA systems, DCS distributed systems, instrumentation for industrial automation, safety in hazardous environments, programmable devices, transducers, application development environments in real time and security systems.

SleepTight Security specialises in installing, fault finding, commissioning and servicing electronic security system, including intruder and burglar alarms, CCTV, electric gates, fire alarm systems, access control.

Smart Communications™ is the only provider of a customer conversations management platform. Built from the cloud up, they help enterprises deliver smarter conversations across the entire customer lifecycle – and at scale – and empower them to succeed in this digital-focused, customer-driven world while also simplifying processes and operating more efficiently.

Smart House is a growing company in the field of security systems established in 2004, it offers a complete line of integrated security systems including CCTV, access control systems, intrusion systems, photo ID badging, UL listed burglar alarm and fire alarm systems.

Established in 2006, Smart-i Electronics System Pvt. Ltd. is an Indian company specializing in a diverse range of identification systems. They offer comprehensive solutions that encompass design, manufacturing, maintenance, and support, catering to the access control, time attendance, and integrated security needs of modern enterprises.

Smartan Nigeria is a technology based company with specialty in the procurement, installation and maintenance of structural safety and security engineering systems. They provide skilled and innovative solutions for advanced building automation systems for residential, commercial and industrial clients.

Smartan Nigeria limited is a technology based company with specialty in the procurement, installation and maintenance of structural safety and security engineering systems.

SMART SHOOTER is a designer, developer, and manufacturer of innovative fire control systems that significantly increase the accuracy and lethality of small arms. Smart Shooter’s fire control solutions were designed to give soldiers and law enforcement officials a precision edge in any given firefight, but the systems bring a range of additional training and operational benefits and can be employed in a wide range of roles.