Top Interior all other support services contractors
In the 12 months ending Oct 5, 2026, the Department of the Interior obligated $11.3M in net prime contract dollars under NAICS 561990, up 252.5% from $3.2M in the preceding 12 months. 39 prime contractors received positive obligations, and 3 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 561990
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 | Waterfleet, LLC | $8.0M | $0 | 69.9% | New |
| 2 | Ceiba Adventures Inc | $900K | $680K | 7.9% | ▼ 1 |
| 3 | GGN Solutions LLC | $348K | $297K | 3.0% | ▼ 1 |
| 4 | Sani-Star LLC | $268K | $248K | 2.3% | ▼ 1 |
| 5 | Law Enforcement Temporary Placement Service, L.L.C | $250K | $241K | 2.2% | ▼ 1 |
| 6 | Lyceum Dynamics LLC | $220K | $0 | 1.9% | New |
| 7 | Gallatin, County of | $191K | $0 | 1.7% | New |
| 8 | Nwestco LLC | $113K | $96K | 1.0% | ▲ 2 |
| 9 | Century Consulting, LLC | $109K | $106K | 0.9% | — |
| 10 | Water Works Solutions Inc | $95K | $0 | 0.8% | New |
| 11 | Water Runner LLC | $87K | $0 | 0.8% | New |
| 12 | Westpark Express | $83K | $80K | 0.7% | ▲ 1 |
| 13 | Rural/Metro Fire Dept., Inc. | $78K | $75K | 0.7% | ▲ 1 |
| 14 | Leilani M Dean | $76K | $0 | 0.7% | New |
| 15 | Samuel Nonemaker | $74K | $0 | 0.7% | New |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Waterfleet, LLC$0 → $8.0M (+$8.0M) · now #1
- Lyceum Dynamics LLC$0 → $220K (+$220K) · now #6
- Ceiba Adventures Inc$680K → $900K (+$220K) · now #2
Largest declines
- Associated Underwater Services, Inc.$239K → −$35K (−$274K) · no latest-period obligations
- Terra Mare Conservation LLC$167K → $0 (−$167K) · no latest-period obligations
- Big Valley Divers, Inc.$19K → −$125K (−$145K) · no latest-period obligations
New to this market
16 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Waterfleet, LLC | Sep 28, 2026 | $8.0M |
| Lyceum Dynamics LLC | Dec 17, 2025 | $220K |
| Gallatin, County of | Apr 17, 2026 | $191K |
| Water Runner LLC | Jan 26, 2026 | $87K |
| Leilani M Dean | Apr 16, 2026 | $76K |
| Samuel Nonemaker | Jul 30, 2026 | $74K |
| Techtera, LLC | Sep 1, 2026 | $35K |
| Workhorse Diving & Salvage, LLC | Jun 18, 2026 | $35K |
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 | $8.8M | $1.0M | Up $7.8M (753.2%) |
| U.S. Geological Survey | $1.3M | $1.1M | Up $214K (20.1%) |
| Bureau of Land Management | $574K | $541K | Up $33K (6.1%) |
| Bureau of Reclamation | $422K | $494K | Down $73K (14.7%) |
| Bureau of Indian Affairs and Bureau of Indian Education | $101K | $12K | Up $89K (733.5%) |
| U.S. Fish and Wildlife Service | $42K | $39K | Up $3K (8.0%) |
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 |
|---|---|---|---|
| 140PS126P0049 | Waterfleet, LLC GRCA SOUTH RIM EMRGENCY WATER HAULING | $8.0M | Nov 15, 2026 |
Common questions
Who are the top Interior contractors for NAICS 561990?
In the latest 12 months, Waterfleet, LLC ($8.0M), Ceiba Adventures Inc ($900K), GGN Solutions LLC ($348K) received the most Interior obligations for all other support services.
How concentrated is this market?
The eight largest primes held 89.9% of positive obligations, and Waterfleet, LLC alone held 69.9%. 16 contractors won their first obligations in this market during the latest 12 months.
Are any large Interior NAICS 561990 contracts ending soon?
1 of the largest awards in this market reach their current end date in the next 18 months. The first is 140PS126P0049 (Waterfleet, LLC, $8.0M obligated), ending Nov 15, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
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$10.1MFigures 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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