Data / Federal awards / NAICS 561621 / Department of Defense
Department of Defense contracts under NAICS 561621 Security Systems Services (except Locksmiths): $1.2 billion to 611 recipients (FY2024 to FY2027)
Updated October 6, 2026. Source: USAspending.gov.
Department of Defense obligated $1.2 billion under NAICS 561621, Security Systems Services (except Locksmiths), across 2,813 contract awards to 611 named recipients in fiscal years 2024 to 2027. The largest recipients are SERCO INC ($305.7 million), M. C. DEAN, INC. ($154.6 million), CACI INTERNATIONAL INC ($100.0 million). 23 opportunities under this code are open on SAM.gov now.
The request: Every federal contract awarded by Department of Defense under NAICS 561621, with the winner, the value and the period of performance. $10 of work on sign-up, no card.
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- Agency
- Department of Defense
- NAICS code
- 561621 Security Systems Services (except Locksmiths)
- Contract awards
- 2,813
- Obligated
- $1.2 billion
- Named recipients
- 611
- Small business share of obligations
- 25%
- Full and open competition share
- 63%
- Set aside share
- 11%
- Latest action
- 2026-07-06
Open opportunities in this niche
The same code on SAM.gov, read each morning: 23 opportunities you can still respond to.
Incumbents at this agency
Ranked by dollars obligated in fiscal years 2024 to 2027.
| Recipient | Business size | Awards | Obligated | Share |
|---|---|---|---|---|
| SERCO INC | Other Than Small Business | 20 | $305.7 million | 25.4% |
| M. C. DEAN, INC. | Other Than Small Business | 247 | $154.6 million | 12.9% |
| CACI INTERNATIONAL INC | Other Than Small Business | 6 | $100 million | 8.3% |
| GENERAL DYNAMICS MISSION SYSTEMS, INC. | Other Than Small Business | 5 | $96.4 million | 8.0% |
| JOHNSON CONTROLS BUILDING AUTOMATION SYSTEMS, LLC | Other Than Small Business | 223 | $56.2 million | 4.7% |
| ADVANCED TECHNOLOGY SYSTEMS COMPANY, INC. (OF VIRGINIA) | Small Business | 4 | $45.7 million | 3.8% |
| XATOR LLC | Other Than Small Business | 16 | $43.2 million | 3.6% |
| MEDIA PLUMBING & HEATING INC | Small Business | 96 | $21.2 million | 1.8% |
| EVERGREEN FIRE ALARMS LLC | Other Than Small Business | 86 | $13.3 million | 1.1% |
| INDYNE, INC | Other Than Small Business | 3 | $12 million | 1.0% |
| TROFHOLZ TECHNOLOGIES, INC. | Small Business | 37 | $11.2 million | 0.9% |
| SRCTEC, LLC | Other Than Small Business | 6 | $10.6 million | 0.9% |
| TOTAL-EVERGREEN JV LLC | Small Business | 9 | $9.5 million | 0.8% |
| JOHNSON CONTROLS SECURITY SOLUTIONS LLC | Other Than Small Business | 137 | $8.9 million | 0.7% |
| VISTA DEFENSE TECHNOLOGIES, LLC | Small Business | 1 | $8.9 million | 0.7% |
| JOHNSON CONTROLS FIRE PROTECTION LP | Other Than Small Business | 33 | $8.5 million | 0.7% |
| HQE SYSTEMS, INC. | Small Business | 46 | $7.5 million | 0.6% |
| ADVANTOR SYSTEMS II LLC | Other Than Small Business | 41 | $7.1 million | 0.6% |
| INTEGRATED SECURITY TECHNOLOGIES INC. | Small Business | 31 | $7.1 million | 0.6% |
| WARFEATHER, LLC | Small Business | 19 | $6.9 million | 0.6% |
| AKAMAI INTELLIGENCE LLC | Small Business | 1 | $6.4 million | 0.5% |
| CHENEGA INTEGRATED SECURITY SOLUTIONS, LLC | Small Business | 1 | $5.8 million | 0.5% |
| SYSTEMS ENGINEERING INC | Small Business | 2 | $5.8 million | 0.5% |
| AKTARIUS LLC | Small Business | 10 | $5.5 million | 0.5% |
| LOW VOLTAGE WIRING LTD | Other Than Small Business | 21 | $5.5 million | 0.5% |
| LBYD FEDERAL, LLC | Small Business | 1 | $5.3 million | 0.4% |
| PROFESSIONALS HIR LLC | Small Business | 71 | $5.2 million | 0.4% |
| BOWHEAD PROTECTION & SECURITY SERVICES LLC | Small Business | 3 | $5.1 million | 0.4% |
| SERNOTTI ELECTRICAL SERVICES LLC | Small Business | 17 | $4.8 million | 0.4% |
| GINISIS GROUP INC. | Small Business | 1 | $4 million | 0.3% |
| MONACO ENTERPRISES, INC. | Small Business | 36 | $3.8 million | 0.3% |
| FIRELAKE CONSTRUCTION INC | Small Business | 10 | $3.6 million | 0.3% |
| FIRELAKE CONSTRUCTION INC | Small Business | 21 | $3.6 million | 0.3% |
| F-CONCEPTS, INC. | Small Business | 7 | $3.5 million | 0.3% |
| IDEMIA NATIONAL SECURITY SOLUTIONS LLC | Small Business | 1 | $3.3 million | 0.3% |
| ECHELON SERVICES, LLC | Small Business | 1 | $3.3 million | 0.3% |
| LDIA HOLDINGS, LLC | Other Than Small Business | 28 | $3.3 million | 0.3% |
| FORTEM TECHNOLOGIES INC | Small Business | 3 | $3.1 million | 0.3% |
| M3T CORPORATION | Small Business | 55 | $3 million | 0.2% |
| SESANTI LIMITED | Other Than Small Business | 1 | $2.9 million | 0.2% |
| RED PEAK TECHNICAL SERVICES, LLC | Small Business | 1 | $2.8 million | 0.2% |
| SECURITY2000 LLC | Small Business | 40 | $2.8 million | 0.2% |
| SIGNET TECHNOLOGIES, INC. | Small Business | 26 | $2.7 million | 0.2% |
| KCORP RELIANCE COMPANY, INC. | Small Business | 16 | $2.4 million | 0.2% |
| SECURITYHUNTER, INC. | Other Than Small Business | 18 | $2.4 million | 0.2% |
| T47 INTERNATIONAL, INC. | Small Business | 2 | $2.4 million | 0.2% |
| THE WHITESTONE GROUP, INC. | Small Business | 1 | $2.4 million | 0.2% |
| MA IMPIANTI S.R.L. | Other Than Small Business | 3 | $2.3 million | 0.2% |
| AMERICAN ENGINEERING CORPORATION | Other Than Small Business | 7 | $2.2 million | 0.2% |
| TACTICA SOLUTIONS LLC | Small Business | 1 | $2.1 million | 0.2% |
Offices buying
| Sub agency | Awards | Obligated |
|---|---|---|
| Department of the Navy | 838 | $507.6 million |
| Department of the Air Force | 750 | $363.2 million |
| Department of the Army | 808 | $155.6 million |
| Washington Headquarters Services | 237 | $115.9 million |
| Defense Logistics Agency | 64 | $12.6 million |
| Missile Defense Agency | 4 | $11.3 million |
| U.S. Special Operations Command | 10 | $10.7 million |
| Defense Health Agency | 34 | $7.3 million |
| Defense Counterintelligence and Security Agency | 2 | $6.4 million |
| Defense Information Systems Agency | 28 | $5.9 million |
Obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2024 | $439.9 million |
| FY2025 | $444.5 million |
| FY2026 | $317.7 million |
Products and services bought
| Code | Product or service | Awards | Obligated |
|---|---|---|---|
| J059 | Maint/repair/rebuild of Equipment- Electrical and Electronic Equipment Components | 62 | $312.6 million |
| 6350 | Miscellaneous Alarm, Signal, and Security Detection Systems | 455 | $221.2 million |
| J063 | Maint/repair/rebuild of Equipment- Alarm, Signal, and Security Detection Systems | 660 | $201.7 million |
| N063 | Installation of Equipment- Alarm, Signal, and Security Detection Systems | 612 | $128.8 million |
| R499 | Support- Professional: Other | 46 | $74.5 million |
| 5810 | Communications Security Equipment and Components | 48 | $46.6 million |
| J012 | Maint/repair/rebuild of Equipment- Fire Control Equipment | 155 | $40.7 million |
| R430 | Support- Professional: Physical Security and Badging | 34 | $32.6 million |
Largest contract awards
| Award ID | Recipient | Agency | Type | NAICS | What it buys | Obligated in window | Award value | Starts | Ends | Place of performance | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| N3943026F0002 | SERCO INC | Department of Defense | Delivery Order | 561621 | THE PURPOSE OF THIS TASK ORDER IS TO AWARD THE ANNUAL SUSTAINMENT OF PUBLIC SAFETY SYSTEMS (PSS) FOR FY26 TO CNIC LOCATIONS WORLDWIDE. | $101,189,996 | $101,189,996 | November 21, 2025 | December 1, 2026 | Port Hueneme Cbc Base, CA | usaspending.gov |
| N0003024C1001 | GENERAL DYNAMICS MISSION SYSTEMS, INC. | Department of Defense | Definitive Contract | 561621 | FY24 PM, SYS ENG, & BUSINESS MGMT | $92,137,531 | $82,155,977 | January 15, 2024 | January 14, 2027 | Pittsfield, MA | usaspending.gov |
| N6426724F4035 | SERCO INC | Department of Defense | Delivery Order | 561621 | GLOBAL SUSTAINMENT OF PSS SYSTEMS | $81,420,874 | $81,420,874 | December 2, 2023 | January 1, 2025 | Herndon, VA | usaspending.gov |
| N3943025F0024 | SERCO INC | Department of Defense | Delivery Order | 561621 | THE PURPOSE OF THIS TASK ORDER IS TO REISSUE N6426725F6103 AS N3943025F0024 WITH ASSOCIATED CLINS. ALL TASK ORDER TERMS AND CONDITIONS IN AC | $47,248,384 | $91,394,570 | April 30, 2025 | March 1, 2026 | Port Hueneme Cbc Base, CA | usaspending.gov |
| N6426725F6103 | SERCO INC | Department of Defense | Delivery Order | 561621 | COMMANDER, NAVY INSTALLATIONS COMMAND (CNIC)PUBLIC SAFETY SYSTEMS (PSS) PROGRAM GLOBAL SUSTAINMENT FY25. | $44,146,186 | $91,394,570 | December 2, 2024 | December 1, 2025 | Herndon, VA | usaspending.gov |
| FA873022C0017 | ADVANCED TECHNOLOGY SYSTEMS COMPANY, INC. (OF VIRGINIA) | Department of Defense | Definitive Contract | 561621 | EGYPTIAN ARMAMENT AUTHORITY (EAA) MOBILE SURVEILLANCE SENSOR SECURITY (MS3) SYSTEM PHASE II | $40,229,158 | $115,888,125 | December 21, 2021 | December 31, 2027 | Mclean, VA | usaspending.gov |
| FA238125FB008 | CACI INTERNATIONAL INC | Department of Defense | Delivery Order | 561621 | PROVIDE TECHNICAL AND MANAGEMENT SUPPORT TO MAINTAIN CONTINUOUS IN-THEATER OPERATIONAL READINESS OF USAFE-AFAFRICA AND USAFCENT EXPEDITIONAR | $36,749,659 | $36,856,659 | April 2, 2025 | July 24, 2026 | Turkey | usaspending.gov |
| FA873023F0009 | CACI INTERNATIONAL INC | Department of Defense | Delivery Order | 561621 | INTEGRATED BASE DEFENSE SECURITY SYSTEM (IBDSS) NEXT - UNITED STATES ARMED FORCES EUROPE (USAFE) REGION | $35,603,432 | $53,404,027 | December 16, 2022 | May 31, 2028 | Chantilly, VA | usaspending.gov |
| FA873023F0006 | M. C. DEAN, INC. | Department of Defense | Delivery Order | 561621 | INTEGRATED BASE DEFENSE SECURITY SYSTEM (IBDSS) NEXT - WESTERN REGION | $32,947,354 | $47,866,416 | February 10, 2023 | February 1, 2028 | Mclean, VA | usaspending.gov |
| FA873023F0007 | XATOR LLC | Department of Defense | Delivery Order | 561621 | INTEGRATED BASE DEFENSE SECURITY SYSTEM (IBDSS) NEXT - EASTERN REGION | $32,889,357 | $59,692,474 | January 6, 2023 | June 4, 2028 | Manassas, VA | usaspending.gov |
| FA873023F0008 | JOHNSON CONTROLS BUILDING AUTOMATION SYSTEMS, LLC | Department of Defense | Delivery Order | 561621 | INTEGRATED BASE DEFENSE SECURITY SYSTEM (IBDSS) NEXT - CENTRAL REGION | $31,013,494 | $44,647,082 | February 9, 2023 | February 9, 2027 | Rockville, MD | usaspending.gov |
| HQ003422F0031 | M. C. DEAN, INC. | Department of Defense | Delivery Order | 561621 | FORCE PROTECTION TECHNOLOGY SUPPORT SERVICES | $26,855,748 | $49,927,847 | December 17, 2021 | December 16, 2026 | Washington, DC | usaspending.gov |
| HQ003422F0029 | M. C. DEAN, INC. | Department of Defense | Delivery Order | 561621 | INTEGRATED SECURITY SERVICES CONTRACT (ISSC4) TO PROVIDE A TOTAL SYSTEM APPROACH FOR INTEGRATED ELECTRONIC AND PHYSICAL SECURITY SYSTEMS. | $24,072,564 | $44,712,658 | December 17, 2021 | December 16, 2026 | Washington, DC | usaspending.gov |
| FA873022F0038 | CACI INTERNATIONAL INC | Department of Defense | Delivery Order | 561621 | U.S. AIR FORCES CENTRAL COMMAND (USAFCENT) OPERATIONAL READINESS SUPPORT IV PROJECT | $18,915,000 | $51,883,863 | April 1, 2022 | May 31, 2025 | Chantilly, VA | usaspending.gov |
| FA873022F0012 | INDYNE, INC | Department of Defense | Delivery Order | 561621 | ELECTRONIC SYSTEMS SECURITY MANAGEMENT AND REMOTE MONITORING ENCLAVE TRANSITION IN SAUDI ARABIA | $11,167,850 | $20,105,551 | November 30, 2021 | June 30, 2026 | Crestview, FL | usaspending.gov |
| W81K0421C0005 | VISTA DEFENSE TECHNOLOGIES, LLC | Department of Defense | Definitive Contract | 561621 | PROVIDE SERVICES FOR SECURITY MAINTENANCE SERVICES AT BROOKE ARMY MEDICAL CENTER, JBSA-FT HOOD, TX. | $8,927,088 | $18,853,642 | May 27, 2021 | November 30, 2026 | San Antonio, TX | usaspending.gov |
| FA873022F0021 | CACI INTERNATIONAL INC | Department of Defense | Delivery Order | 561621 | AIR FORCES AFRICA OPERATIONAL READINESS SUPPORT 3 | $8,718,226 | $18,101,699 | February 2, 2022 | May 31, 2025 | Chantilly, VA | usaspending.gov |
| HQ003423F0254 | M. C. DEAN, INC. | Department of Defense | Delivery Order | 561621 | PENTAGON OPERATIONS CENTER (POC) ALARM MONITORING | $7,343,092 | $8,750,151 | May 15, 2023 | February 14, 2027 | Alexandria, VA | usaspending.gov |
| N6426724F4037 | SERCO INC | Department of Defense | Delivery Order | 561621 | ALARM MONITORING AUTOMATED SYSTEM (AMAS)TECHNICAL REFRESHMENT | $6,984,867 | $6,984,867 | August 19, 2024 | August 18, 2026 | Herndon, VA | usaspending.gov |
| HS002126CE009 | AKAMAI INTELLIGENCE LLC | Department of Defense | Definitive Contract | 561621 | DCSA REQUIRES A CONTRACT FOR A SECURITY MANAGEMENT SYSTEM (SMS) PROVIDING INTRUSION DETECTION AND ACCESS CONTROL AT CONUS/OCONUS SITES. THE | $6,362,525 | $8,209,017 | May 15, 2026 | May 14, 2027 | Quantico, VA | usaspending.gov |
| FA873021F0020 | SRCTEC, LLC | Department of Defense | Delivery Order | 561621 | SYRACUSE RESEARCH CORP SOFTWARE AND ENGINEERING SUPPORT, DELIVERY ORDER #2 | $6,320,830 | $29,231,186 | October 14, 2020 | August 24, 2025 | Syracuse, NY | usaspending.gov |
| N3943025F0170 | SERCO INC | Department of Defense | Delivery Order | 561621 | ARMY TACOM GIANT VOICE (GV) RETROFIT/UPGRADES PHASE III AT ARMY BASES WORLDWIDE | $6,197,833 | $6,197,833 | September 19, 2025 | September 21, 2026 | Port Hueneme Cbc Base, CA | usaspending.gov |
| N6426724F4036 | SERCO INC | Department of Defense | Delivery Order | 561621 | COMMAND NAVAL INSTALLATION COMMAND N6 PUBLIC SAFETY SYSTEMS, SYSTEMS AND INTEGRATED OPERATION SUPPORT | $6,022,149 | $6,022,149 | May 4, 2024 | May 5, 2025 | Herndon, VA | usaspending.gov |
| H9224021F0027 | TROFHOLZ TECHNOLOGIES, INC. | Department of Defense | Delivery Order | 561621 | IESS SUPPORT | $5,965,795 | $14,479,264 | October 20, 2020 | April 19, 2026 | San Diego, CA | usaspending.gov |
| HQ085122F0007 | CHENEGA INTEGRATED SECURITY SOLUTIONS, LLC | Department of Defense | Delivery Order | 561621 | GUARD FORCE SERVICE MILMF | $5,769,616 | $9,545,414 | March 25, 2022 | April 3, 2027 | Chantilly, VA | usaspending.gov |
Public U.S. federal spending data (U.S. Department of the Treasury). Obligations are the contract actions dated in fiscal years 2024 to 2027 of the USAspending.gov award archive of 2026-10-06; a contract's total value is its current value as USAspending reports it, including earlier years. Recipients are matched on their SAM.gov UEI, never on the name, and are shown as the government prints them. Sole proprietorships and opted-out entities count in the totals and are not named. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.