Security Systems Services (except Locksmiths): NAICS 561621
Browse federal contract opportunities classified under NAICS code 561621 (Security Systems Services (except Locksmiths)). Find active solicitations on SAM.gov, understand size standards, and discover set-aside opportunities for your business.
About NAICS 561621
Security Systems Services (except Locksmiths). This industry falls under the Administrative and Support and Waste Management sector (NAICS codes beginning with 56).
Federal agencies use NAICS code 561621 when posting contract opportunities on SAM.gov to classify the type of work being solicited. Businesses that operate in the security systems services (except locksmiths) space should include this code in their SAM.gov registration and capability statements to ensure they appear in relevant searches.
How to Use NAICS 561621 in Federal Contracting
To compete for federal contracts under NAICS 561621, your business should be registered in SAM.gov with this NAICS code listed in your entity profile. When agencies post solicitations for security systems services (except locksmiths) work, they reference this code to determine the applicable small business size standard and any set-aside eligibility.
If you hold certifications such as 8(a), HUBZone, SDVOSB, or WOSB, you may be eligible for set-aside contracts under this NAICS code. These set-asides limit competition to certified small businesses, giving you a significant advantage in winning federal work.
FedOverwatch monitors SAM.gov daily and can automatically match you with new opportunities under NAICS 561621. Set up your profile with your NAICS codes and certifications to receive personalized contract alerts.
NAICS 561621 Market Intelligence
Based on 3 years of federal award data from USAspending.gov, the security systems services (except locksmiths) market has seen 9,784 contract awards totaling $2.2B in value. The median contract size is $30K, with approximately 272 new awards per month.
Total Awards (3yr)
9,784
Total Value
$2.2B
Median Contract
$30K
Competitors
1,448
Contract value distribution
5,186 small business awards ($707.0M total value,$30K median)
1,448 companies compete for NAICS 561621 contracts
See who's winning, their award values, and where you fit in the market
Explore CompetitorsSize Standards
The SBA establishes size standards for each NAICS code to define what qualifies as a "small business" for federal contracting purposes. For NAICS 561621 (Security Systems Services (except Locksmiths)), the size standard is based on either average annual receipts or number of employees, depending on the specific industry. Meeting the size standard for your primary NAICS code is required to qualify for small business set-aside contracts.
Visit the SBA Size Standards Table to find the current threshold for NAICS 561621.
Recent NAICS 561621 Opportunities
View all →The Department of Defense is procuring base alarm services for the Los Angeles Air Force Base. This procurement is set aside for small businesses and involves security detection systems. Key contacts include Lt Dorian Maynard and SSgt Victor Mendoza.
The Department of Defense is procuring maintenance and lifecycle support services for the Integrated Commercial Intrusion Detection System (ICIDS) at Fort Jackson, SC. The contractor will be responsible for maintaining 171 zones across critical facilities and must accommodate an estimated 10% system growth during the contract period. This requirement is set aside for Total Small Business under FAR 19.5.
The Department of Veterans Affairs is procuring a new physical access control system for the VISN20 Offices at the VA Portland Healthcare System, Vancouver Campus. The contractor will provide all necessary services, hardware, and software to replace the existing system, ensuring compliance with VA-OIT Technical Resource Manual standards. The project is set in a managed building located at 1601 E 4th Plain Blvd, Vancouver, WA.
The Department of Defense is procuring IDS Inspection Services for the United States Army Garrison at Fort Devens, MA. The contractor will provide bi-annual inspection services at various locations on the base, including specific buildings and ammunition supply points. This contract is set aside for Service-Disabled Veteran-Owned Small Businesses and will be awarded as a Firm Fixed Price contract with a base period and four option periods.
The Department of Defense is procuring a Fire Alarm Reporting System for the National Guard Bureau, which includes the repair and replacement of fire alarm control panels and servers at the 174th Attack Wing Hancock Field Air National Guard Base in Syracuse, NY. Key requirements include installing and configuring new servers and radios, ensuring compliance with federal codes, and completing the work within 365 calendar days after notice to proceed.
The Department of Veterans Affairs is procuring a service agreement for the LYNX Panic Alarm system. Key requirements include compliance with various representations and certifications as outlined in the solicitation. The contract will involve updates and maintenance of alarm, signal, and security detection systems.
The Department of Veterans Affairs is contracting for a service agreement related to the LYNX Panic Alarm system. This includes the maintenance and repair of alarm, signal, and security detection systems. Key requirements involve compliance with specific representations and certifications as outlined in the agency's policies.
after published date (00004) Authority Other Statutory Authority (e.g. 8a
The Department of Veterans Affairs is procuring maintenance services for the LYNX Panic Alarm System for the Police Services at the Hampton VA Medical Center. This requirement is set aside for small businesses, and the anticipated solicitation will be posted on SAM.gov around July 20, 2026, with quotes due by July 24, 2026.
The Department of Defense is seeking to procure installation and monitoring services for an intrusion detection system at a facility in San Diego, CA. The contractor will be responsible for providing a complete security system that includes an alarm system, camera surveillance, and access control, ensuring compliance with the Trade Agreements Act. Interested parties must demonstrate their capability to fulfill these requirements and may need to undergo background checks for personnel security clearances.
Frequently Asked Questions
What is NAICS code 561621?
How many federal contracts use NAICS 561621?
How to find contracts for NAICS 561621?
What is the SBA size standard for NAICS 561621?
Get NAICS 561621 contracts delivered to your inbox
Set up your profile with your NAICS codes and certifications, and FedOverwatch will automatically match you with relevant security systems services (except locksmiths) opportunities as they're posted on SAM.gov.