NAICS 561621 - Security Systems Services (except Locksmiths)

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What is NAICS 561621

NAICS code 561621 covers establishments primarily engaged in the sale, installation, repair, and monitoring of security alarm systems, including burglar and fire alarms. This sector also includes businesses providing remote electronic security monitoring services. Companies operating under this classification offer comprehensive security solutions designed to protect properties, assets, and personnel from theft, fire, and other hazards. These services are critical for both commercial and residential clients, as well as government entities requiring enhanced security protocols. Government agencies contract these services to safeguard federal, state, and local facilities, ensuring operational continuity and compliance with safety regulations. The evolving nature of security threats and technological advancements has increased demand for integrated alarm and monitoring systems, making this sector vital for infrastructure protection and emergency response readiness.

Industry Classification for NAICS 561621

This U.S. industry comprises establishments primarily engaged in (1) selling security alarm systems, such as burglar and fire alarms, along with installation, repair, or monitoring services or (2) remote monitoring of electronic security alarm systems.

Breakdown for NAICS 561621

  • Includes sale, installation, repair, and monitoring of security alarm systems.
  • Covers both physical and electronic security alarm services, excluding locksmiths.
  • Applies to businesses providing remote monitoring of alarm systems.
  • Typical projects involve commercial, residential, and government facility security.
  • Small business size standard commonly applies, enabling SBA program eligibility.
  • Contracts often include installation, maintenance, and ongoing monitoring services.

Included Activities for NAICS 561621

  • Selling and installing burglar and fire alarm systems.
  • Repairing and maintaining electronic security alarm equipment.
  • Providing remote monitoring of security alarm systems.
  • Integrating security alarm systems with access control and surveillance.
  • Conducting regular system testing and emergency response coordination.
  • Upgrading legacy alarm systems to meet current government standards.
  • Training government personnel on alarm system operation and protocols.
  • Performing on-site inspections and compliance assessments.

Business Types for NAICS 561621

  • Security system installation companies.
  • Electronic monitoring service providers.
  • Security technology integrators.
  • Maintenance and repair service firms.
  • Small to medium-sized security contractors.
  • Specialized remote monitoring operators.

Subcategories for NAICS 561621

  • Alarm system monitoring services
  • Alarm systems sales combined with installation, repair, or monitoring services
  • Burglar alarm monitoring services
  • Burglar alarm sales combined with installation, repair, or monitoring services
  • Fire alarm monitoring services
  • Fire alarm sales combined with installation, repair, or monitoring services
  • Security alarm systems sales combined with installation, repair, or monitoring services
  • Security system monitoring services

Government Buyers for NAICS 561621

Federal, state, and local government agencies are the primary buyers of security systems services under NAICS 561621. Agencies such as the Department of Homeland Security, Department of Defense, General Services Administration, and various law enforcement and public safety departments require these services to secure government buildings, critical infrastructure, and public spaces. They rely on these services to enhance situational awareness, prevent unauthorized access, and monitor for fire or security breaches, ensuring the safety of employees, visitors, and sensitive information. The need for reliable and technologically advanced security systems drives consistent procurement in this sector, often with an emphasis on compliance with federal standards and cybersecurity integration.

Contract Types & Procurement for NAICS 561621

Contracts for NAICS 561621 services typically include firm-fixed-price, indefinite-delivery indefinite-quantity (IDIQ), and time-and-materials agreements. Procurement methods often involve competitive bidding, simplified acquisition procedures for smaller contracts, and multiple-award schedules such as GSA Schedules. Contract values vary widely depending on the size and complexity of the installation or monitoring system, ranging from small maintenance contracts to multi-million dollar comprehensive security system deployments. Agencies may also award task orders under broader security services contracts, emphasizing performance standards, rapid response times, and technology upgrades. Long-term service agreements for monitoring and maintenance are common to ensure ongoing system reliability.

Details for NAICS 561621

Explore the hierarchy and related codes for this industry

NAICS Code Industry Title
561 Administrative and Support Services
5611 Office Administrative Services
56111 Office Administrative Services
561110 Office Administrative Services
5612 Facilities Support Services
56121 Facilities Support Services
561210 Facilities Support Services
5613 Employment Services
56131 Employment Placement Agencies and Executive Search Services
561311 Employment Placement Agencies
561312 Executive Search Services
56132 Temporary Help Services
561320 Temporary Help Services
56133 Professional Employer Organizations
561330 Professional Employer Organizations
5614 Business Support Services
56141 Document Preparation Services
561410 Document Preparation Services
56142 Telephone Call Centers
561421 Telephone Answering Services
561422 Telemarketing Bureaus and Other Contact Centers
56143 Business Service Centers
561431 Private Mail Centers
561439 Other Business Service Centers (including Copy Shops)
56144 Collection Agencies
561440 Collection Agencies
56145 Credit Bureaus
561450 Credit Bureaus
56149 Other Business Support Services
561491 Repossession Services
561492 Court Reporting and Stenotype Services
561499 All Other Business Support Services
5615 Travel Arrangement and Reservation Services
56151 Travel Agencies
561510 Travel Agencies
56152 Tour Operators
561520 Tour Operators
56159 Other Travel Arrangement and Reservation Services
561591 Convention and Visitors Bureaus
561599 All Other Travel Arrangement and Reservation Services
5616 Investigation and Security Services
56161 Investigation, Guard, and Armored Car Services
561611 Investigation and Personal Background Check Services
561612 Security Guards and Patrol Services
561613 Armored Car Services
56162 Security Systems Services
561621 Current Security Systems Services (except Locksmiths)
561622 Locksmiths
5617 Services to Buildings and Dwellings
56171 Exterminating and Pest Control Services
561710 Exterminating and Pest Control Services
56172 Janitorial Services
561720 Janitorial Services
56173 Landscaping Services
561730 Landscaping Services
56174 Carpet and Upholstery Cleaning Services
561740 Carpet and Upholstery Cleaning Services
56179 Other Services to Buildings and Dwellings
561790 Other Services to Buildings and Dwellings
5619 Other Support Services
56191 Packaging and Labeling Services
561910 Packaging and Labeling Services
56192 Convention and Trade Show Organizers
561920 Convention and Trade Show Organizers
56199 All Other Support Services
561990 All Other Support Services
562 Waste Management and Remediation Services
5621 Waste Collection
56211 Waste Collection
562111 Solid Waste Collection
562112 Hazardous Waste Collection
562119 Other Waste Collection
5622 Waste Treatment and Disposal
56221 Waste Treatment and Disposal
562211 Hazardous Waste Treatment and Disposal
562212 Solid Waste Landfill
562213 Solid Waste Combustors and Incinerators
562219 Other Nonhazardous Waste Treatment and Disposal
5629 Remediation and Other Waste Management Services
56291 Remediation Services
562910 Remediation Services
56292 Materials Recovery Facilities
562920 Materials Recovery Facilities
56299 All Other Waste Management Services
562991 Septic Tank and Related Services
562998 All Other Miscellaneous Waste Management Services

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