Top Interior all other professional, scientific, and technical services contractors
In the 12 months ending Oct 5, 2026, the Department of the Interior obligated $62.9M in net prime contract dollars under NAICS 541990, up 17.0% from $53.8M in the preceding 12 months. 427 prime contractors received positive obligations, and 40 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 541990
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 | Cherokee United Services, L.L.C. | $9.9M | $0 | 15.0% | New |
| 2 | Inalab Consulting, Inc. | $7.6M | $4.3M | 11.6% | ▲ 3 |
| 3 | Xcellent Technology Solutions, Inc | $6.5M | $10.8M | 9.8% | ▼ 2 |
| 4 | Chenhall Sedona Services Joint Venture, LLC | $5.8M | $6.0M | 8.8% | — |
| 5 | Flatwater, Incorporated | $4.5M | $6.5M | 6.8% | ▼ 3 |
| 6 | Navancio LLC | $2.0M | $879K | 3.1% | ▲ 5 |
| 7 | Akima Systems Engineering LLC | $2.0M | $1.2M | 3.0% | — |
| 8 | Hamer Environmental Limited Partnership | $1.9M | $658K | 2.9% | ▲ 5 |
| 9 | Montech Inc | $1.6M | $571K | 2.4% | ▲ 5 |
| 10 | CCI Construction and Energy Services, LLC | $1.3M | $219K | 2.0% | ▲ 19 |
| 11 | Advenco LLC | $749K | $890K | 1.1% | ▼ 1 |
| 12 | Institute for Defense Analyses | $677K | $0 | 1.0% | New |
| 13 | Tribalco LLC | $625K | $136 | 0.9% | ▲ 272 |
| 14 | Sundance Consultants, LLC | $577K | $561K | 0.9% | ▲ 1 |
| 15 | Tanner Environmental Services LLC | $535K | $478K | 0.8% | ▲ 2 |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Cherokee United Services, L.L.C.$0 → $9.9M (+$9.9M) · now #1
- Inalab Consulting, Inc.$4.3M → $7.6M (+$3.4M) · now #2
- Hamer Environmental Limited Partnership$658K → $1.9M (+$1.2M) · now #8
Largest declines
- Cherokee Nation System Solutions LLC$6.2M → $506K (−$5.7M) · now #16
- Xcellent Technology Solutions, Inc$10.8M → $6.5M (−$4.3M) · now #3
- Otak, Inc.$2.2M → −$319K (−$2.5M) · no latest-period obligations
New to this market
287 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Cherokee United Services, L.L.C. | May 20, 2026 | $9.9M |
| Institute for Defense Analyses | Aug 10, 2026 | $677K |
| TEK Annoa LLC | May 29, 2026 | $441K |
| Managed Business Solutions LLC | Jan 13, 2026 | $392K |
| Bridges System Integration LLC | May 1, 2026 | $335K |
| Deloitte & Touche LLP | Jan 5, 2026 | $240K |
| Erin Todd | Jun 29, 2026 | $139K |
| Christina Marie Biagetti Appleby | Aug 20, 2026 | $139K |
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 |
|---|---|---|---|
| U.S. Geological Survey | $38.6M | $28.2M | Up $10.4M (36.9%) |
| Bureau of Indian Affairs and Bureau of Indian Education | $14.4M | $14.6M | Down $214K (1.5%) |
| National Park Service | $3.5M | $3.6M | Down $87K (2.4%) |
| Bureau of Land Management | $2.7M | $5.4M | Down $2.7M (49.3%) |
| Departmental Offices | $1.7M | $130K | Up $1.5M (1181.7%) |
| Bureau of Reclamation | $1.6M | $3.9M | Down $2.4M (60.1%) |
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 |
|---|---|---|---|
| 140G0226F0269 | Xcellent Technology Solutions, Inc XTS SYSTEMS DEVELOPMENT TASK ORDER | $1.6M | Dec 31, 2026 |
| 140A1623P0018 | Sundance Consultants, LLC SAFETY MANAGEMENT SYSTEM | $2.2M | Feb 26, 2027 |
| 140P2124F0170 | Otak, Inc. CONTRACTOR SHALL PROVIDE AND INCORPORATE OVERALL PROJECT MANAGEMENT SERVICES INTO ALL TASKS OUTLINED IN THIS TASK ORDER FOR A NPS SOCIOECONOMIC MONITORING PROGRAM. | $2.5M | Mar 15, 2027 |
| 140D0425F1007 | Kearns & West Inc PROVIDE FACILITATION, COLLABORATIVE PROBLEM-SOLVING SERVICES TO THE BUREAU OF RECLAMATION | $2.2M | Mar 31, 2027 |
| 140A1626F0122 | Flatwater, Incorporated TECHNICAL SUPPORT SERVICES FOR DEMD | $4.7M | May 12, 2027 |
| 140A2324F0184 | Chenhall Sedona Services Joint Venture, LLC BIE QUARTERS CONTRACTOR SERVICES | $2.6M | Jun 30, 2027 |
| 140A2325F0110 | Chenhall Sedona Services Joint Venture, LLC BIE FACILITIES SUPPORT | $11.8M | Jul 28, 2027 |
| 140P2125F0176 | Otak, Inc. NR-SRRD-366 SEM YEAR 5 | $2.5M | Sep 23, 2027 |
| 140F0S23C0009 | American Forests THORNSCRUB RESTORATION SERVICES | $9.6M | Sep 30, 2027 |
| 140A1625F0123 | Navancio LLC ENVIRONMENTAL MANAGEMENT, ASSESSMENT, AND PERFORMANCE (EMAP) PROGRAM - OTS PROGRAM MANAGEMENT AND INDUSTRIAL ENGINEERING CONSULTING SERVICES (PMIECS) IDIQ | $1.9M | Sep 30, 2027 |
Common questions
Who are the top Interior contractors for NAICS 541990?
In the latest 12 months, Cherokee United Services, L.L.C. ($9.9M), Inalab Consulting, Inc. ($7.6M), Xcellent Technology Solutions, Inc ($6.5M) received the most Interior obligations for all other professional, scientific, and technical services.
How concentrated is this market?
The eight largest primes held 61.0% of positive obligations, and Cherokee United Services, L.L.C. alone held 15.0%. 287 contractors won their first obligations in this market during the latest 12 months.
Are any large Interior NAICS 541990 contracts ending soon?
10 of the largest awards in this market reach their current end date in the next 18 months. The first is 140G0226F0269 (Xcellent Technology Solutions, Inc, $1.6M obligated), ending Dec 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
NAICS 541990 across all agencies
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$2.8BHHS · NAICS 541990
$1.3BDOT · NAICS 541990
$557.4MUSAID · NAICS 541990
$277.4MCommerce · NAICS 541990
$213.3MState Department · NAICS 541990
$169.3MVA · NAICS 541990
$110.0MFigures 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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