National Sheriffs'​ Association headquarters is located in Alexandria, Virginia and offers training, information, court security services, jail information and other law enforcement services to sheriffs, deputies, and others throughout the nation. NSA has worked to forge cooperative relationships with local, state, and federal criminal justice professionals across the nation to network and share information about homeland security programs.

National Technology Management provides expertise to startup companies designing their first voice and data networks. Based in Southfield, USA, the company also provides security system services like access control system, CCTV cameras etc. for banking/finance, education, energy/oil & gas, gaming, government, healthcare markets.

One of the largest privately held national electronic security system integrator in the USA, NAVCO keeps one step ahead of ever-changing technology. They combine unmatched expertise with unrivaled service to offer complete business security solutions that meet specific challenges today, while protecting business interests and investments.

NControl offers a group of scalable, hardware-independent Asset Tracking Systems called NEAT. Their NEAT systems add intelligence to asset tracking with their ability to determine asset direction, use two-man rules, control doors, generate workstation alarms or activate cameras. NEAT can track personnel and assets; even use different hardware in the same installation. NControl can design and install the perfect tracking solution for your needs.

With over 40 years of heritage in electronic manufacturing services, NEOTech focuses on low-medium volume/high-mix, high-complexity products primarily in the defence/aerospace, industrial and medical device design, and manufacturing field. Their business is all about converting innovative product technology into state-of-the-art engineered products.

NetPosa Technologies Ltd. is a manufacturer of video monitoring management platform in China. It is an enterprise for kernel video processing technologies and provides video application support for city anti-terrorism, IoT, smart city and mobile internet

Netradyne has established technology innovation centres in both San Diego, California and Bangalore, India. In both locales, its teams have been busy creating a groundbreaking artificial intelligence (AI) platform to disrupt commercial vehicle and driver analytics. Netradyne is the first commercial vehicle technology provider to combine AI with video to detect, reason and determine causality of events.

Netwatch is heavily invested in R&D; recently devoting more than $500,000 to develop unique technology that can distinguish whether an alarm has been triggered by human activity and which can filter out false alarms. To reduce cost, the system has been proven to be more effective than CCTV, an alarm, and a security guard combined. Netwatch’s managed service offering provides a cost effective and accountable monitored alarm system for any premise.

New York Security Solutions, Inc. designs, implements and manages physical security systems using a proprietary process that delivers the next generation technology, integrated within your existing infrastructure, and supported by 24/7 customer service.

Newland Systems LLC provides unparalleled robust, cost effective, security solutions for Government (Local / State / Federal), law enforcement, healthcare, education, transportation, industrial, commercial and retail sectors. The company possesses vast experience in designing, installing, servicing, and maintaining electronic security technologies such as video surveillance, door access control, intrusion detection, and intercom communication.

NEXCOM complete security surveillance solutions integrate megapixel IP cameras and VMS and offer superb image quality. The plug-and-play feature makes the NexNVR easy to deploy for users. NEXCOM VMS solutions support live view, playback, system configuration and quick access anytime and anywhere.

NextGen Security is an integrated physical and electronic security provider. Their comprehensive suite of services include consultation, design, fabrication, integration, training, and support. NextGen Security also provides a wide range of security solutions such as access control systems, video management systems, optical and physical turnstiles, thermal video analytics, fibre-based fence detection, and IP-based communication systems.

NICE is a provider of both cloud and on-premises enterprise software solutions that empower organisations to make smarter decisions based on advanced analytics of structured and unstructured data. NICE helps organisations of all sizes deliver better customer service, ensure compliance, combat fraud and safeguard citizens.

Nightwatch Security & Telephone, LLC was founded in 1980 and has been designing, installing, maintain gand repairing all types of protecting and alerting security systems ever since. From fire alarm systems to surveillance cameras, Nightwatch Security & Telephone assist clients at home, business, or both.

NMS is a global integrated security service provider that specialising in physical security, including armed and unarmed guards, roving patrol and TSA-level screening. The technological solutions offered include radar systems, SpotterRF distributors, video surveillance, access control solutions and biometrics.

NNB Security Company offered services catering to Building security, hotel security, security for stores, clubs, lounges, pubs and events as well. The team is built through a work environment that embraces creativity and innovation; encourages promotion from within; and challenges each individual to lead.

Nobi Corporation is a provider of security & fire systems in the USA. Powered by Alarm.com, the company offers CCTV, security alarm systems, access control, and smoke detectors etc. solutions to residential, local government, churches, businesses, schools, and commercial applications.

NOREL Service Company provides integrated life safety and security systems & service. NOREL’s Alarm and Life Safety design includes fire alarm systems, addressable control, conventional control, voice evacuation, facility access control, alarm communications, system monitoring, networked fire alarm and audio, audible/visible notification, public address and intercom, digital detection and reporting. Veteran-Owned VOSB and VBE.

North Carolina Sound was founded in 1988 in Zebulon, NC, covering central North Carolina until opening an office in Goldsboro in 2001. They hold an Unlimited NC Electrical License and NC Burglar Alarm License. They provide IP and analogue security cameras, door access systems, security alarm systems, telephone systems, voice/data and fibre cabling. Board room audio and video presentation and recording systems, fire and burglar alarm monitoring.

North Central Security Services Inc. provides various security services, such as installing security systems at homes, commercial centers, etc.

Northeast Remote Surveillance & Alarm LLC. offers anything from a single camera CCTV monitoring system to Town Camera Systems with an unlimited number of surveillance cameras in multiple offsite locations with the ability to centrally monitor and record. The company specialises in providing custom built Intel PC based DVR and NVR solutions to fulfill customer needs.

Northrop Grumman Information Systems is a leading global provider of advanced solutions that deliver timely, enabling information for military, intelligence, civilian, state and local, and commercial customers. The company offers homeland security tailored to the scale and scope of its customers, such as surveillance and intelligence, emergency response, and infrastructure security and privacy.

SMT make ready services, tape & reel, OEM packaging, custom carrier tape development, lead forming & tinning, programming, reel splitting. Authorized distributor of 3M tape & reel products

NSC Security Technology GmbH provides services like certification, leasing, tutorials. They deal with areas of security by offering products in the line of fire detection, voice alarm, video technology, risk management.

G4S security solutions group has acquired Nuclear Security Services Corporation (NSSC). G4S Nuclear Security Services Company (NSSC) delivers sophisticated security products and services within the regulated and nuclear industries. The core of company's success is the expertise in a full range of security solutions and the combined experience of highly qualified experts, engineers and technical analysts.

Numerica deploys advanced technology solving some of the country’s greatest defence challenges in the areas of air, missile and space defence. Founded in 1996 in Fort Collins, Colorado, the company’s technologies deliver precision domain awareness in space and advanced surveillance capabilities for critical air defence missions.