Top Interior facilities support services contractors
In the 12 months ending Oct 5, 2026, the Department of the Interior obligated $59.3M in net prime contract dollars under NAICS 561210, up 12.9% from $52.5M in the preceding 12 months. 101 prime contractors received positive obligations, and 12 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 561210
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 | C & S Building Services Inc | $10.5M | $4.6M | 17.7% | ▲ 5 |
| 2 | The Building People LLC | $6.6M | $5.7M | 11.1% | ▲ 1 |
| 3 | Chugach Solutions Enterprise, LLC | $5.0M | $7.3M | 8.4% | ▼ 2 |
| 4 | Aramark Sports and Entertainment Services, LLC | $4.5M | $6.3M | 7.5% | ▼ 2 |
| 5 | Persimmon Grove LLC | $4.3M | $274K | 7.3% | ▲ 17 |
| 6 | Applied Research Associates, Inc. | $4.1M | $5.6M | 6.9% | ▼ 2 |
| 7 | Kaiva Services, LLC | $3.8M | $778K | 6.3% | ▲ 5 |
| 8 | VNS Federal Services LLC | $2.2M | $2.3M | 3.7% | — |
| 9 | BEN Fitzgerald Real Estate Services, L.L.C. | $2.1M | $0 | 3.5% | New |
| 10 | Unify NOW | $2.0M | $0 | 3.4% | New |
| 11 | Kaiyuh Services, LLC | $1.5M | $5.1M | 2.6% | ▼ 6 |
| 12 | Unique Cleaning Service, Inc. | $1.1M | −$85K | 1.8% | New |
| 13 | k2m Design, Inc | $916K | $599K | 1.5% | — |
| 14 | Spectrum Management, LLC. | $899K | $782K | 1.5% | ▼ 3 |
| 15 | CMI Management, LLC | $724K | $3.4M | 1.2% | ▼ 8 |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- C & S Building Services Inc$4.6M → $10.5M (+$5.9M) · now #1
- Persimmon Grove LLC$274K → $4.3M (+$4.0M) · now #5
- Kaiva Services, LLC$778K → $3.8M (+$3.0M) · now #7
Largest declines
- Kaiyuh Services, LLC$5.1M → $1.5M (−$3.6M) · now #11
- CMI Management, LLC$3.4M → $724K (−$2.7M) · now #15
- Chugach Solutions Enterprise, LLC$7.3M → $5.0M (−$2.3M) · now #3
New to this market
34 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| BEN Fitzgerald Real Estate Services, L.L.C. | Aug 10, 2026 | $2.1M |
| Midnight Sun Professional Solutions LLC | Dec 17, 2025 | $549K |
| Columbia Resource Conservation District | Aug 14, 2026 | $505K |
| Lorton Stone, LLC | May 29, 2026 | $467K |
| Acterra Group Inc | Aug 18, 2026 | $381K |
| Sustainable Facilities Management Services, LLC | Sep 25, 2026 | $337K |
| Four Seasons Environmental Inc | Sep 2, 2026 | $247K |
| Clear Global Solutions LLC | Feb 2, 2026 | $215K |
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 | $27.3M | $11.7M | Up $15.6M (133.5%) |
| U.S. Fish and Wildlife Service | $10.4M | $17.2M | Down $6.8M (39.7%) |
| U.S. Geological Survey | $9.4M | $8.2M | Up $1.2M (14.6%) |
| Bureau of Reclamation | $5.2M | $8.1M | Down $3.0M (36.5%) |
| Bureau of Safety and Environmental Enforcement | $4.6M | $5.8M | Down $1.1M (19.8%) |
| Bureau of Land Management | $1.6M | $1.1M | Up $549K (52.2%) |
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 |
|---|---|---|---|
| 140R3025F0074 | Kaiyuh Services, LLC 140R3022D0013 YDP O&M CONTRACT - TASK 04 | $5.2M | Oct 31, 2026 |
| 140P8524F0051 | Unique Cleaning Service, Inc. CUSTODIAL SERVICES FOR ALCATRAZ ISLAND - GOLDEN GATE NATIONAL RECREATION AREA - SAN FRANCISCO, CA | $2.1M | Nov 10, 2026 |
| 140F0421F0057 | CMI Management, LLC WV-NCTC-FACILITY OP-O&M SERVICES | $9.9M | Dec 30, 2026 |
| 140E0124F0028 | Applied Research Associates, Inc. OHMSETT MRO BASE YEAR 2024 | $6.6M | Jan 31, 2027 |
| 140R4025C0004 | VNS Federal Services LLC PARADOX VALLEY UNIT (PVU) OPERATIONS, MAINTENANCE, AND REPAIRS (OM&R) SERVICES | $4.4M | Mar 26, 2027 |
| 140D0424F0927 | Spectrum Management, LLC. PREVENTATIVE MAINTENANCE TASK ORDER | $1.7M | Jul 31, 2027 |
| 140P8624C0001 | Unify NOW PREVENTATIVE MAINTENANCE SERVICES FOR ALCATRAZ ISLAND, GOLDEN GATE NATIONAL RECREATION AREA, SAN FRANCISCO COUNTY, CALIFORNIA | $4.0M | Aug 29, 2027 |
| 140F0422C0011 | Aramark Sports and Entertainment Services, LLC NCTC GUEST SERVICES | $19.6M | Aug 31, 2027 |
| 140P4526F0026 | C & S Building Services Inc MONTHLY MECHANICAL OPERATIONS AND MAINTENANCE SERVICES FOR THE STATUE OF LIBERTY AND ELLIS ISLAND NATIONAL MONUMENTS | $5.9M | Sep 3, 2027 |
| 140G0326F0119 | BEN Fitzgerald Real Estate Services, L.L.C. MOFFETT O&M AND JANITORIAL | $2.1M | Sep 9, 2027 |
Common questions
Who are the top Interior contractors for NAICS 561210?
In the latest 12 months, C & S Building Services Inc ($10.5M), The Building People LLC ($6.6M), Chugach Solutions Enterprise, LLC ($5.0M) received the most Interior obligations for facilities support services.
How concentrated is this market?
The eight largest primes held 68.8% of positive obligations, and C & S Building Services Inc alone held 17.7%. 34 contractors won their first obligations in this market during the latest 12 months.
Are any large Interior NAICS 561210 contracts ending soon?
10 of the largest awards in this market reach their current end date in the next 18 months. The first is 140R3025F0074 (Kaiyuh Services, LLC, $5.2M obligated), ending Oct 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
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$266.2MFigures 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.
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