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NAICS Code· 561621

NAICS 561621: Security Systems Services (except Locksmiths)

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. Cross-References. Establishments primarily engaged in--Show more

NAICS 561621 – Security Systems Services (except Locksmiths) encompasses the installation, integration, maintenance, and monitoring of electronic security systems designed to protect physical assets, personnel, and sensitive infrastructure. This includes intrusion detection systems, access control platforms, video surveillance networks, alarm monitoring centers, and integrated security management software.

230
Active Contracts
$574.6M
Total Obligations (12mo)
1.4K
Awarded Contracts (12mo)
571
Contractors Awarded (12mo)
1
Median Bidders per Award
-18.2%
YoY Growth

Industry Spending Overview

Federal obligations, top contractors and agencies, and related industry codes for NAICS 561621.

AI Industry Description

NAICS 561621 – Security Systems Services (except Locksmiths) encompasses the installation, integration, maintenance, and monitoring of electronic security systems designed to protect physical assets, personnel, and sensitive infrastructure. This includes intrusion detection systems, access control p...

NAICS 561621 – Security Systems Services (except Locksmiths) encompasses the installation, integration, maintenance, and monitoring of electronic security systems designed to protect physical assets, personnel, and sensitive infrastructure. This includes intrusion detection systems, access control platforms, video surveillance networks, alarm monitoring centers, and integrated security management software. These services are critical for securing federal facilities, data centers, border infrastructure, and mission-critical operations, often requiring compliance with FISMA, NIST, and DHS cybersecurity standards. The sector bridges physical security and cybersecurity domains, with contractors delivering end-to-end solutions that combine hardware, firmware, and cloud-based analytics to enable real-time threat response and audit-ready reporting. Top contractors in this space include INTER-PACIFIC INC., ACTIVE SECURITY CONSULTING LLC, PVPII - FNSS ACQUISITION, INC., and UNIVERSAL ELECTRONIC ALARMS, INC., among others. The competitive landscape is dominated by small businesses and mid-tier primes with specialized expertise in federal compliance, system integration, and rapid deployment of secure infrastructure. Many firms hold 8(a), HUBZone, or SDVOSB certifications, reflecting a strong presence of disadvantaged and veteran-owned businesses in this niche. Primary federal buyers include the Department of Defense, Department of Homeland Security, Department of Veterans Affairs, and Department of Justice, with additional demand from the Department of the Interior, General Services Administration, and Department of State. These agencies procure security systems to safeguard military installations, border patrol operations, VA medical campuses, and diplomatic facilities, often as part of broader infrastructure modernization and physical security upgrade initiatives. The market is highly fragmented yet opportunity-dense, with recurring maintenance contracts and system upgrades driving steady demand. Contractors with proven experience in federal procurement compliance, system interoperability, and cybersecurity integration are best positioned to compete. Emerging trends include the adoption of AI-enabled video analytics, cloud-connected alarm platforms, and zero-trust access control architectures, creating new avenues for innovation and contract growth.

Top Contractors

Companies with the highest total award value under NAICS 561621, ranked by dollars won.

Ranked by total awards
CompanyTotal AwardsContracts
M. C. DEAN, INC.$106.6M73
SERCO INC$101.7M4
PARAGON SYSTEMS INC$57.7M2
AKAMAI INTELLIGENCE LLC$47.2M1
TROFHOLZ TECHNOLOGIES, INC.$29.8M6
TRIPLE CANOPY INC$24.3M3
JOHNSON CONTROLS SECURITY SOLUTIONS LLC$12.2M65
JOHNSON CONTROLS BUILDING AUTOMATION SYSTEMS, LLC$9.8M40
SCDATACOM, LLC$7.5M17
VERSAR SECURITY SYSTEMS, LLC$5.4M16

Top Agencies

Federal agencies directing the most contract spending toward NAICS 561621.

Department Of Defense511 awards$200.9M
Department Of Homeland Security113 awards$101.8M
693KA8 System Operations Contracts1 award$53.6M
Defense Ci And Security Agency1 award$47.2M
Department Of Transportation23 awards$29.4M
Naval Special Warfare Command1 award$27.1M
Department Of Justice112 awards$24.5M
Department Of Veterans Affairs167 awards$19.4M
Department Of Transportation (dot)20 awards$10.5M
Department Of Defense (dod)40 awards$7.6M

Competition

How many companies historically bid on federal awards in NAICS 561621, from bidder counts reported on USAspending.

Usually Single-Bid

Half or more of reported awards drew exactly one bidder, usually a sign of incumbent-held work rather than an open field. · 61,552 reported awards

Median Bidders

1

Per reported award, all-time

Single-Bid Awards

59%

Share of reported awards with one bidder

10+ Bidder Awards

1%

Share of reported awards with 10+ bidders

Reported Awards

0

86% of 71,539 total awards

How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.

Industry FamilyCompetitionMedian BiddersSingle-BidBidder MixReported Awards
561621This Code
Security Systems Services (except Locksmiths)
Usually Single-Bid159%
61,55286% of 71,539
56162NAICS Industry
Usually Single-Bid159%
65,21586% of 76,019
5616Industry Group
Investigation and Security Services
Usually Single-Bid156%
145,41081% of 179,247
561Subsector
Fewer Bidders248%
846,91580% of 1,064,681
56Sector
Administrative and Support and Waste Management and Remediation Services
Fewer Bidders245%
1,120,35477% of 1,459,586

Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.

Related NAICS Codes

Industries similar to Security Systems Services (except Locksmiths), by shared sector, subsector, and industry group.

Investigation and Personal Background Check Services

This U.S. industry comprises establishments primarily engaged in providing investigation, detective,...
561611Same Industry GroupHigh Similarity

Security Guards and Patrol Services

This U.S. industry comprises establishments primarily engaged in providing guard and patrol services...
561612Same Industry GroupHigh Similarity

Armored Car Services

This U.S. industry comprises establishments primarily engaged in picking up and delivering money, re...
561613Same Industry GroupHigh Similarity

Locksmiths

This U.S. industry comprises establishments primarily engaged in (1) selling mechanical or electroni...
561622Same Industry GroupHigh Similarity

Office Administrative Services

This industry comprises establishments primarily engaged in providing a range of day-to-day office a...
561110Same SubsectorMedium Similarity

Facilities Support Services

This industry comprises establishments primarily engaged in providing operating staff to perform a c...
561210Same SubsectorMedium Similarity

Employment Placement Agencies

This U.S. industry comprises establishments primarily engaged in listing employment vacancies and in...
561311Same SubsectorMedium Similarity

Executive Search Services

This U.S. industry comprises establishments primarily engaged in providing executive search, recruit...
561312Same SubsectorMedium Similarity

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NAICS 561621 FAQ

Frequently Asked Questions

NAICS code 561621 covers Security Systems Services (except Locksmiths). 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. Cross-References. Establishments primarily engaged in--

Recently Posted in Security Systems Services (except Locksmiths)

NAICS: 561621
New
Keystone Building 54 Fire Alarm Replacement
Solicitation # keystone-building-54-fire-alarm-replacement
The Keystone Building 54 Fire Alarm Replacement solicitation, issued by Adams and Associates Keystone Red Rock Job Corps, seeks a contractor to replace a malfunctioning Simplex 2002 fire alarm control unit with a Simplex 4007ES at the Keystone Job Corps center in Drums, Pennsylvania. The scope of work includes relocating the unit behind an existing wall within a closet to protect it from masonry dust, adding one smoke detector near the new location, and performing all necessary installation, programming, and certification. The contractor must ensure that all existing initiating and notification devices remain compatible with the new system. This opportunity is set aside for various small business categories, including Small Disadvantaged Businesses, Women-Owned Small Businesses, HUBZone, and Veteran-Owned Small Businesses, under NAICS code 561621. Bidders must be registered and active in SAM.gov and are required to provide certified payroll in accordance with Davis-Bacon wage requirements. Proposals must separate labor and material costs and be submitted by the deadline of September 11, 2026. The primary point of contact for this project is Jennie Drumheller.
Adams & Associates Keystone Red Rock Job Corps

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1 day ago

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in 13 days
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NAICS: 561621
New
FIRE ALARM REPAIRS
Solicitation # WL – 26 - 005
The Woodland Job Corps Center, operated by Adams and Associates, Inc. for the U.S. Department of Labor, is soliciting a single lump sum contract for fire alarm repairs and system upgrades in Laurel, Maryland. The scope of work includes replacing 13 smoke detectors with multi-criteria detectors featuring integrated CO sensors, installing a VESDA aspirating smoke detection system in the atrium, and replacing a non-operational remote annunciator panel at the south main entrance. The contractor may also be required to upgrade the main fire alarm control panel motherboard to ensure CO detector functionality. All work must comply with NFPA 72 and NFPA 101 standards, as well as EPA, OSHA, and Maryland state regulations. Proposals are due by September 3, 2026, and must be submitted on company letterhead with a detailed cost breakdown for labor, materials, and equipment. A mandatory site visit was scheduled for August 20, 2026, and only vendors who attended will be considered. Award will be based on best value rather than lowest price. The selected contractor must start work within 14 days of the Notice to Proceed and provide a sequenced construction schedule within 10 days. Payment terms are Net 30, and final payment is contingent upon the submission of certified payroll records, a completed SF 1413, and the release of liens. The contract includes a one-year warranty on all workmanship. This opportunity is set aside for small businesses and various SBA-certified categories.
ADAMS & ASSOCIATES\ WOODLAND JOB CORPS CENTER

POSTED

1 day ago

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in 6 days
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NAICS: 561621
New
RR Sullivan Hall Fire Alarm Upgrade
Solicitation # rr-sullivan-hall-fire-alarm-upgrade
The RR Sullivan Hall Fire Alarm Upgrade is a solicitation issued by Adams & Associates Keystone Red Rock Job Corps for the replacement of the main fire alarm panel and all associated devices at the Sullivan Dorm in Sweet Valley, Pennsylvania. This project is necessitated by the existing system being in trouble mode, requiring a full upgrade of the fire alarm infrastructure. The solicitation is open to various small business set-asides, including SDB, WOSB, HUBZone, VOSB, and SDVOSB, under NAICS code 561621. Bidders must be registered and active on Sam.gov and are required to separate labor and materials within their proposals. The contract is subject to Davis Bacon wage rates, and the winning contractor must provide certified payroll. The response deadline for this opportunity is September 8, 2026.
Adams & Associates Keystone Red Rock Job Corps

POSTED

1 day ago

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in 10 days
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NAICS: 561621
New
SLED
CCTV System Maintenance And As-Needed Technical Support Services At The Van Nuys Driver Safety Office
Solicitation # 20260826022
Bid 26-130 is a solicitation by the California Department of Motor Vehicles for CCTV system maintenance and technical support services at the Van Nuys Driver Safety Office. The contract covers a 36-month term and includes scheduled maintenance, on-site technical support, and the potential replacement of specific hardware, such as a Prime XVL 202 camera, an ENS Security digital video recording system, a Dell widescreen monitor, a Unix power supply, and a 2TB hard drive. The estimated budget for the project is 24,942 dollars, though responsive bids exceeding this amount will be considered. All labor and travel costs for approved on-site service calls must be integrated into the quarterly pricing. The deadline for responses is September 9, 2026.
Department Of Motor Vehicles

POSTED

2 days ago

DEADLINE

in 11 days
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NAICS: 561621
New
SLED
509-750049- Fire System/Sprinkler Maint.
Solicitation # SRC0000035525
This multi-year small purchase agreement covers the repair and maintenance of the fire alarm and sprinkler systems at the ALDOT WCR Area 5 Equipment/Warehouse Building in Tuscaloosa, Alabama. The contract spans three one-year periods from October 1, 2026, through September 30, 2029. The scope of work includes servicing a Gamewell-FCI S3 Series main panel, an addressable annunciator, 317 sprinkler heads, a pull station, and a photoelectric smoke detector, with services requested on an as-needed basis for tasks such as board upgrades and component replacements. The selected provider must provide fixed service call fees, hourly rates, overtime rates, and a percentage mark-up for materials. A strict prohibition is placed on subcontracting or assigning any portion of the work. Additionally, the agreement forbids any rate increases, fuel surcharges, or price escalations throughout the entire duration of the service period.
Wc Reg Tuscaloosa Area Eqpt M

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2 days ago

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in 5 days
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NAICS: 561621
New
SLED
RFP DOT Managed Security Service Provider (MSSP) #2025-067
Solicitation # 2025-067
The New Hampshire Department of Transportation is seeking qualified vendors to provide managed security services and field support through a solicitation designated as RFP DOT Managed Security Service Provider #2025-067. The selected Managed Security Service Provider will augment the existing NHDoIT team serving the TSMO Bureau and TMC operations by delivering specialized cybersecurity expertise and on-site network maintenance to safeguard critical intelligent transportation systems infrastructure. This role is essential to ensuring compliance with state and federal security mandates, maintaining the resilience of operational systems, and protecting hardware and software devices that support transportation management and monitoring functions across New Hampshire. Proposals must be submitted by October 13, 2026, with the solicitation posted on July 16, 2026. The contract requires the vendor to respond rapidly to security incidents, perform proactive threat monitoring, conduct vulnerability assessments, and deliver hands-on field services to maintain network integrity and system availability. The primary point of contact for inquiries is Nicholas King, reachable via phone or email. All services must be performed in alignment with the operational needs and security protocols established by the NHDOT, and the vendor must demonstrate proven experience in delivering similar services within public sector transportation environments.
Department Of Transportation

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2 days ago

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in about 2 months
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NAICS: 561621
New
SLED
Detention Controls And Security Electronics Systems Maintenance And Support
Solicitation # 20260826001
The County of Calaveras is soliciting proposals for a Professional Services Agreement to provide comprehensive maintenance and support for detention controls and security electronics systems at the Adult Detention Facility and Sheriff’s Office in San Andreas, California. The scope of work includes preventative maintenance, technical support, troubleshooting, repair, software and licensing support, and emergency response for critical life-safety and security systems, specifically those utilizing Omron PLC, GE Cimplicity HMI, and FLIR/Teledyne Latitude. Key deliverables include at least two comprehensive annual inspections with written reports delivered within five business days of each visit, as well as cybersecurity updates and system reliability assessments. The anticipated period of performance extends from the date of execution through June 30, 2029. Award evaluation is based on firm qualifications and relevant experience, technical approach, response time commitments, and the quality of the knowledge transfer plan. The selected contractor must assign competent personnel and is prohibited from changing key staff without prior written consent from the County. Compensation is based on a budget and rate structure to be defined by the vendor, with payments processed within 30 days of receipt of complete invoices. The agreement requires the contractor to adhere to professional standards of care, comply with all federal and state laws, and provide full indemnification to the County for liabilities arising from the performance of the contract. Proposals are due by September 3, 2026.
County of Calaveras

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2 days ago

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NAICS: 561621
Closed
Federal
X-Ray Baggage Security Screening Scanners
Solicitation # X-RAYBAGGAGESECURITYSCREENINGSCANNERS
The U.S. Navy, through the Naval Supply Systems Command Fleet Logistics Center in San Diego, California, has issued a Sources Sought Notice for X-Ray Baggage Security Screening Scanners under the NAICS code 423450, designated as a Small Business Set Aside with total small business participation. This notice is strictly for information gathering and market research purposes and does not represent a formal solicitation, guarantee of award, or obligation to procure any goods or services. Respondents should note that any costs incurred in preparing and submitting capability statements are the sole responsibility of the submitter, and the Government will not compensate for administrative or technical expenses related to this notice. The information provided is preliminary and subject to change without notice, and failure to respond will not disqualify any interested party from participating in future formal requests for proposals or quotes. The Statement of Work is attached and provides the technical requirements, and all responses in the form of capability statements must be emailed to Jennifer Stevens at jennifer.k.stevens7.civ@us.navy.mil no later than August 13, 2026, at 3:00 PM Eastern Time. The intended place of performance is San Diego, California.
Navsup Flt Logistics Ctr San Diego

POSTED

2 days ago

CLOSED

16 days ago
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NAICS: 561621
New
Federal
J063--PACS Maintenance SDVOSB Set-Aside
Solicitation # 36C10D26Q0144
This contract is a Service-Disabled Veteran-Owned Small Business (SDVOSB) set-aside solicitation for the maintenance of a Patient Administration and Control System (PACS), issued by the Veterans Benefits Administration under the Department of Veterans Affairs. The solicitation, numbered 36C10D26Q0144, targets commercial services under FAR Part 12 and requires offerings from businesses certified as SDVOSBs in SAM.gov, with validation through the SBA’s VetCert database. The primary place of performance is the Providence Regional Office in Rhode Island, with services delivered on-site during standard business hours, Monday through Friday, excluding federal holidays. The base performance period runs from August 24, 2026, through August 23, 2027, with four one-year options exercisable at the government’s discretion, extending potential performance through August 23, 2031. The scope of work includes quarterly preventative maintenance inspections and six annual emergency services inspections for security alarm and detection systems, along with controlled power outages and system updates. Deliverables are performance-based, assessed using adjectival ratings for quality, timeliness, and compliance, with inspection and acceptance performed solely by the government at the site of operation. Technical proposals are limited to five pages and must demonstrate experience and certifications, while past performance and price are equally weighted evaluation factors; award will go to the quote offering the best overall value, with price serving as the primary differentiator among technically acceptable offers. The contract requires electronic invoice submission through the Tungsten (OB10) platform or X12 EDI, payment via EFT to the Financial Services Center in Austin, TX, and full compliance with VA security protocols, including background investigations, PIV card requirements, and adherence to VA Directives and Handbooks governing personnel access and information systems. Offerors must submit proposals in four volumes via email, no later than July 30, 2026, at 5:30 PM ET, with attachments under 5 MB, in PDF or Word format, using specified fonts and excluding hyperlinks. All representations, including UEI, SDVOSB status, and limitations on subcontracting, must be accurately certified, with fraudulent claims subject to criminal penalties. The contract incorporates standard FAR clauses with deviations regarding commercial items, whistleblower protections, labor standards, and security prohibitions, while explicitly excluding packaging, marking, and pricing data from the solicitation, indicating pricing will be negotiated
Veterans Benefits Administration (36C10D)

POSTED

2 days ago

DEADLINE

in 6 days
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NAICS: 561621
New
Federal
USCG Station Valdez Fire Inspection, Repairs, and Cellular Monitoring
Solicitation # 37570PR260000006
Solicitation 37570PR260000006 is a request for quotation for fire inspection, repairs, and cellular monitoring services at USCG Station Valdez in Alaska. This combined synopsis and solicitation is a total set-aside for small business concerns under NAICS code 561621. The scope of work involves the annual inspection, testing, certification, and minor troubleshooting of fire alarm and suppression systems across multiple Coast Guard facilities in Valdez. The selected contractor must provide a firm-fixed price and complete all performance requirements within 60 days of the award. Evaluation will be based on best value, prioritizing technical expertise and experience performing these specific services within the state of Alaska, particularly in rural areas, over price. Offerors must submit a technical capability section of no more than three pages demonstrating their proficiency in fire detection and suppression systems. Quotes are due by September 2, 2026, at 1:00 p.m. Alaska time. The contract incorporates various FAR provisions and labor standards, including Wage Determination 2015-5681 for the state of Alaska.
Base KODIAK(00045)

POSTED

2 days ago

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in 5 days
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NAICS: 561621
New
Federal
J063--CTX Surveillance System Installation Palestine CBOC
Solicitation # 36C25726Q0692
Solicitation 36C25726Q0692 is a request for quotation issued by the Department of Veterans Affairs Network Contracting Office 17 for the installation of a new IP camera surveillance system at the Palestine VA Outpatient Clinic in Texas. This procurement is specifically set aside for Service-Disabled Veteran-Owned Small Businesses under NAICS code 561621. The project requires the deployment of a system integrated with OpenEye Web Services for cloud-managed video and secure remote access. Key deliverables include the fully operational system, as-built cabling and equipment drawings, configuration documentation, and final acceptance test results. The contract also encompasses ongoing requirements such as an annual OWS access license, annual camera maintenance including firmware updates and lens cleaning, and emergency camera repairs with a required response time of 24 to 48 hours. The installation must adhere to OSHA, NEC, NFPA, and VA guidelines, and all components must maintain NDAA Section 889 compliance. Acceptance of the project is contingent upon the system passing a full operational test without deficiencies, meeting specific video resolution and clarity requirements, and the approval of a final documentation package by the VA. Offerors must submit their quotes by August 31, 2026, at 10:00 AM Central Time. The pricing schedule includes line items for the initial installation, web-based monitoring, annual maintenance, and emergency repairs. All work must be performed in accordance with VA IT security and network policies, with strict adherence to guidelines for protecting sensitive and controlled unclassified information.
257-NETWORK Contract Office 17 (36C257)

POSTED

2 days ago

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in 2 days
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NAICS: 561621
New
Federal
El Paso Access Control Upgrade
Solicitation # 15DDHQ26Q00000177
The Department of Justice Headquarters is seeking a contractor for the El Paso Access Control Upgrade project under solicitation number 15DDHQ26Q00000177. This project, categorized under NAICS code 561621, will be performed in El Paso, Texas. The solicitation was posted on August 27, 2026, with a response deadline of September 7, 2026, at 2:00 PM. There are no set-aside restrictions for this opportunity. Interested parties should contact Ms. Angel Barkley for further information.
Headquaters

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