Top Interior security guards and patrol services contractors
In the 12 months ending Oct 5, 2026, the Department of the Interior obligated $38.5M in net prime contract dollars under NAICS 561612, down 2.0% from $39.3M in the preceding 12 months. 92 prime contractors received positive obligations, and 8 of them accounted for 80% of that spend.
Prime contracts funded by the Department of the Interior. Latest 12 months: Oct 6, 2025 to Oct 5, 2026. Source: USAspending.gov.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year (October to September).
Top Interior contractors for NAICS 561612
Ranked by positive obligations in the latest 12 months. Share is of all positive obligations in this market.
| # | Contractor | Latest 12 mo | Prior 12 mo | Share | Rank change |
|---|---|---|---|---|---|
| 1 | The Whitestone Group, Inc. | $9.6M | $10.2M | 24.0% | — |
| 2 | Centerra Group, LLC | $7.5M | $5.7M | 18.8% | ▲ 1 |
| 3 | Universal Protection Service, LLC | $4.0M | $8.7M | 10.1% | ▼ 1 |
| 4 | Chenega Naswik International LLC | $3.4M | $1.7M | 8.5% | ▲ 1 |
| 5 | Chenega Security California Corporation | $3.0M | $2.4M | 7.4% | ▼ 1 |
| 6 | Kerberos International, Inc. | $2.2M | $1.6M | 5.4% | — |
| 7 | Ahtna Logistics, LLC | $1.7M | $0 | 4.2% | New |
| 8 | Acadia Protective Services II, LLC | $1.4M | $1.2M | 3.6% | — |
| 9 | Montech Inc | $952K | $1.5M | 2.4% | ▼ 2 |
| 10 | Ares Defense Group LLC | $832K | $773K | 2.1% | ▼ 1 |
| 11 | Unalakleet Investments LLC | $319K | $554K | 0.8% | — |
| 12 | A & a Security of Idaho LLC | $316K | $195K | 0.8% | ▲ 4 |
| 13 | Lane County Oregon | $276K | $333K | 0.7% | — |
| 14 | Awics Security & Investigations, Inc | $262K | $0 | 0.7% | New |
| 15 | Triumph Protection Group Inc. | $231K | $205K | 0.6% | — |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Centerra Group, LLC$5.7M → $7.5M (+$1.8M) · now #2
- Ahtna Logistics, LLC$0 → $1.7M (+$1.7M) · now #7
- Chenega Naswik International LLC$1.7M → $3.4M (+$1.7M) · now #4
Largest declines
- Universal Protection Service, LLC$8.7M → $4.0M (−$4.7M) · now #3
- Chenega Total Asset Protection, LLC$0 → −$812K (−$812K) · no latest-period obligations
- The Whitestone Group, Inc.$10.2M → $9.6M (−$663K) · now #1
New to this market
12 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Ahtna Logistics, LLC | Aug 28, 2026 | $1.7M |
| County of Douglas | Aug 18, 2026 | $227K |
| Top Notch Security Inc. | Mar 24, 2026 | $210K |
| Advanced Private Police LLC | Jun 17, 2026 | $111K |
| Scent-Works K-9 Academy, L.L.C. | Aug 18, 2026 | $111K |
| Wright Dynamics LLC | Jul 13, 2026 | $108K |
| Yamhill County Administration | Dec 30, 2025 | $104K |
| Good Guard Security, Inc. | Jun 26, 2026 | $70K |
Where the money comes from
Funding sub-agencies within the Department of the Interior, latest 12 months. The funding organization can differ from the office that runs the requirement.
| Funding sub-agency | Latest 12 mo | Prior 12 mo | Change |
|---|---|---|---|
| National Park Service | $13.8M | $17.9M | Down $4.1M (23.1%) |
| Departmental Offices | $7.5M | $5.7M | Up $1.8M (31.0%) |
| U.S. Geological Survey | $7.3M | $6.7M | Up $577K (8.6%) |
| Bureau of Reclamation | $6.1M | $5.3M | Up $784K (14.8%) |
| Bureau of Land Management | $2.6M | $2.4M | Up $180K (7.5%) |
| U.S. Fish and Wildlife Service | $1.1M | $1.0M | Up $67K (6.4%) |
Potential recompetes
Large awards in this market whose current period of performance ends in the next 18 months. Treat these as research leads: options, extensions, and follow-on vehicles often change the timing.
| Award | Incumbent | Obligated | Current end |
|---|---|---|---|
| 140D0421F0293 | Centerra Group, LLC GUARD SERVICES FOR THE MAIN INTERIOR BUILDING IN WASHINGTON, DC | $32.3M | Oct 31, 2026 |
| 140R3021C0019 | Acadia Protective Services II, LLC LAND MANAGEMENT AND PUBLIC SAFETY SERVICES AT PARKER DAM | $4.0M | Mar 20, 2027 |
| 140F0S24F0017 | The Whitestone Group, Inc. SECURITY GUARD SERVICES FOR THE NATIONAL CONSERVATION TRAINING CENTER | $2.1M | Mar 31, 2027 |
| 140R3021C0015 | Acadia Protective Services II, LLC LAND MANAGEMENT AND PUBLIC SAFETY SERVICES AT DAVIS DAM | $1.7M | Mar 31, 2027 |
| 140P2126F0031 | Chenega Naswik International LLC EO 14398 UNARMED SECURITY GUARD SERVICES - LINC MUSEUM | $1.2M | Jun 3, 2027 |
| 140R3023C0004 | Kerberos International, Inc. HD ARMED AND UNARMED SECURITY SERVICES | $7.1M | Jun 30, 2027 |
| 140R2023C0015 | Chenega Security California Corporation NORTHERN CALIFORNIA AREA OFFICE (NCAO) ARMED SECURITY GUARD SERVICES - CONTRACTOR SHALL PROVIDE WELL-TRAINED, HIGHLY CAPABLE SECURITY GUARDS AT SHASTA DAM, A NATIONAL CRITICAL… | $8.8M | Sep 15, 2027 |
Common questions
Who are the top Interior contractors for NAICS 561612?
In the latest 12 months, The Whitestone Group, Inc. ($9.6M), Centerra Group, LLC ($7.5M), Universal Protection Service, LLC ($4.0M) received the most Interior obligations for security guards and patrol services.
How concentrated is this market?
The eight largest primes held 82.2% of positive obligations, and The Whitestone Group, Inc. alone held 24.0%. 12 contractors won their first obligations in this market during the latest 12 months.
Are any large Interior NAICS 561612 contracts ending soon?
7 of the largest awards in this market reach their current end date in the next 18 months. The first is 140D0421F0293 (Centerra Group, LLC, $32.3M obligated), ending Oct 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
NAICS 561612 across all agencies
DHS · NAICS 561612
$4.7BState Department · NAICS 561612
$870.4MDoD · NAICS 561612
$388.9MDOJ · NAICS 561612
$200.9MHHS · NAICS 561612
$126.6MNASA · NAICS 561612
$96.5MVA · NAICS 561612
$72.1MDOE · NAICS 561612
$69.9MFigures are net obligations on prime contracts (award types A–D) from USAspending.gov, grouped by funding agency and the NAICS code on each award. Net obligations include deobligations and corrections, so they can differ from positive-obligation totals. See methodology.
Ready to connect your pursuit work?
GovEagle gives BD directors, capture managers, and proposal teams one AI workspace from pipeline through proposal, with CMMC/FedRAMP Certified compliance built in.