Top DoD historical sites contractors
In the 12 months ending Oct 5, 2026, the Department of Defense obligated $9.8M in net prime contract dollars under NAICS 712120, up 188.3% from $3.4M in the preceding 12 months. 9 prime contractors received positive obligations, and 2 of them accounted for 80% of that spend.
Prime contracts funded by the Department of Defense. Latest 12 months: Oct 6, 2025 to Oct 5, 2026. Source: USAspending.gov.
DoD publishes contract data to USAspending with a 90-day delay, so the most recent months understate DoD activity.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year (October to September).
Top DoD contractors for NAICS 712120
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 | Four Tribes Civil Construction LLC | $6.3M | $0 | 64.4% | New |
| 2 | International Archaeology, LLC | $3.0M | $2.0M | 30.4% | ▼ 1 |
| 3 | Confederated Salish and Kootenai Tribes of the Flathead Reservation | $129K | $76K | 1.3% | ▲ 2 |
| 4 | Kalispel Indian Community of the Kalispel Reservation | $126K | $0 | 1.3% | New |
| 5 | Confederated Tribes of Colville Reservation | $110K | $38K | 1.1% | ▲ 2 |
| 6 | Smith Art Conservation, LLC | $49K | $46K | 0.5% | — |
| 7 | The Ilwaco Heritage Foundation | $48K | $0 | 0.5% | New |
| 8 | Pacific Consulting Services Inc | $46K | $213K | 0.5% | ▼ 5 |
| 9 | Kleinfelder Inc | $5K | $821K | 0.1% | ▼ 7 |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Four Tribes Civil Construction LLC$0 → $6.3M (+$6.3M) · now #1
- International Archaeology, LLC$2.0M → $3.0M (+$947K) · now #2
- Kalispel Indian Community of the Kalispel Reservation$0 → $126K (+$126K) · now #4
Largest declines
- Kleinfelder Inc$821K → $5K (−$816K) · now #9
- Pacific Consulting Services Inc$213K → $46K (−$167K) · now #8
- Viakorp Corporation$150K → $0 (−$150K) · no latest-period obligations
New to this market
3 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Four Tribes Civil Construction LLC | Apr 21, 2026 | $6.3M |
| Kalispel Indian Community of the Kalispel Reservation | Feb 12, 2026 | $126K |
| The Ilwaco Heritage Foundation | Feb 18, 2026 | $48K |
Where the money comes from
Funding sub-agencies within the Department of Defense, 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 |
|---|---|---|---|
| Department of the Army | $6.8M | $187K | Up $6.6M (3529.4%) |
| Department of the Navy | $3.0M | $2.8M | Up $275K (10.0%) |
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 |
|---|---|---|---|
| N6274223F0117 | Kleinfelder Inc CR-23A ARCHAEOLOGICAL SERVICES IN SUPPORT OF P-290 CONSTRUCTION OF EARTH COVERED MAGAZINES AND ORDNANCE PADS, ANDERSEN AIR FORCE BASE (AAFB) MUNITIONS STORAGE AREA, ISLAND OF GUAM | $1.7M | Dec 31, 2026 |
| N6274223F0157 | Kleinfelder Inc CR-23G, ARCHAEOLOGICAL SERVICES IN SUPPORT OF P-187 CONSTRUCTION OF SOUTH PREDATOR EXCLUSION BARRIER, NAVAL BASE GUAM TELECOMMUNICATIONS SITE (MARINE CORPS BASE CAMP BLAZ),… | $1.1M | Dec 31, 2026 |
| W912P926CA002 | Four Tribes Civil Construction LLC THIS PROJECT IS THE REHABILITATION AND INSTALLATION OF THE MOSES EZEKIEL SCULPTURE AT ARLINGTON NATIONAL CEMETERY (ANC). | $6.3M | Apr 10, 2027 |
Common questions
Who are the top DoD contractors for NAICS 712120?
In the latest 12 months, Four Tribes Civil Construction LLC ($6.3M), International Archaeology, LLC ($3.0M), Confederated Salish and Kootenai Tribes of the Flathead Reservation ($129K) received the most DoD obligations for historical sites.
How concentrated is this market?
The eight largest primes held 100.0% of positive obligations, and Four Tribes Civil Construction LLC alone held 64.4%. 3 contractors won their first obligations in this market during the latest 12 months.
Are any large DoD NAICS 712120 contracts ending soon?
3 of the largest awards in this market reach their current end date in the next 18 months. The first is N6274223F0117 (Kleinfelder Inc, $1.7M obligated), ending Dec 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
Figures 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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