Top DoD building inspection services contractors
In the 12 months ending Oct 5, 2026, the Department of Defense obligated $73.9M in net prime contract dollars under NAICS 541350, up 89.0% from $39.1M in the preceding 12 months. 47 prime contractors received positive obligations, and 4 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 541350
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 | t2s, LLC | $20.4M | $0 | 27.7% | New |
| 2 | OST Inc | $19.2M | $0 | 26.0% | New |
| 3 | Kearney & Company, P.C. | $13.1M | $0 | 17.7% | New |
| 4 | Analex Corporation | $7.6M | $970K | 10.2% | ▲ 2 |
| 5 | Riverside Research Institute | $2.7M | $0 | 3.7% | New |
| 6 | Data Computer Corporation of America | $2.5M | $1.3M | 3.4% | ▼ 1 |
| 7 | Intrepid LLC | $1.9M | $0 | 2.6% | New |
| 8 | Great Hill Solutions, LLC | $1.1M | $0 | 1.5% | New |
| 9 | Knowesis, Inc. | $995K | $364K | 1.4% | — |
| 10 | Blue Construction Services LLC | $854K | $1.3M | 1.2% | ▼ 6 |
| 11 | Systems Planning and Analysis, Inc. | $803K | $0 | 1.1% | New |
| 12 | Parsons Government Services Inc. | $721K | $627K | 1.0% | ▼ 4 |
| 13 | Lalini Enterprises LLC | $227K | $225K | 0.3% | ▼ 2 |
| 14 | Southern Aire Contracting, Inc. | $185K | $247K | 0.3% | ▼ 4 |
| 15 | Multivariable Systems Tech, LLC | $144K | $102K | 0.2% | ▲ 2 |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- t2s, LLC$0 → $20.4M (+$20.4M) · now #1
- OST Inc$0 → $19.2M (+$19.2M) · now #2
- Kearney & Company, P.C.$0 → $13.1M (+$13.1M) · now #3
Largest declines
- JLL-RER Solutions, LLC$21.2M → $0 (−$21.2M) · no latest-period obligations
- Cognizant Government Solutions, Inc.$5.8M → $0 (−$5.8M) · no latest-period obligations
- Sawdey Solution Services Inc$4.4M → $0 (−$4.4M) · no latest-period obligations
New to this market
14 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| t2s, LLC | Mar 10, 2026 | $20.4M |
| OST Inc | Jan 30, 2026 | $19.2M |
| Kearney & Company, P.C. | Apr 23, 2026 | $13.1M |
| Riverside Research Institute | Jan 14, 2026 | $2.7M |
| Intrepid LLC | Apr 1, 2026 | $1.9M |
| Great Hill Solutions, LLC | Mar 12, 2026 | $1.1M |
| Systems Planning and Analysis, Inc. | Feb 27, 2026 | $803K |
| BBL Bahnbau Luneburg Gmbh | Dec 11, 2025 | $143K |
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 | $51.1M | $25.6M | Up $25.5M (99.7%) |
| Department of the Air Force | $20.9M | $12.7M | Up $8.2M (64.1%) |
| Defense Health Agency | $995K | $364K | Up $631K (173.4%) |
| Department of the Navy | $817K | $668K | Up $149K (22.2%) |
| Defense Security Cooperation Agency | $47K | $0 | New |
| Defense Logistics Agency | $17K | $54K | Down $36K (67.8%) |
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 |
|---|---|---|---|
| W9124M22P0004 | Southern Aire Contracting, Inc. BASE REAL PROP INSP | $1.2M | Nov 30, 2026 |
| 47QFSA26F0015 | Great Hill Solutions, LLC USAF CENTRAL INTEGRATED JOINT SPECIAL TECHNICAL OPERATIONS IJSTO SUPPORT BRIDGE | $1.1M | Dec 14, 2026 |
| HT942525FE011 | Knowesis, Inc. ADMINISTRATIVE MANAGEMENT, SCIENTIFIC ANALYSIS, TECHNICAL AND FINANCIAL MANAGEMENT FOR CHEMICAL, BIOLOGICAL, RADIOLOGICAL AND NUCLEAR (CBRN) DEFENSE COORDINATING OFFICE (DCO) AND… | $1.4M | Feb 21, 2027 |
| FA701426F0106 | Kearney & Company, P.C. WORKFORCE DEVELOPMENT AND EXECUTIVE SUPPORT | $3.8M | Mar 20, 2027 |
| W91QV124C0023 | Blue Construction Services LLC JBMHH FIRE SYSTEMS INSPECTION, TESTING AND MAINTENANCE | $2.8M | Mar 26, 2027 |
| W911W626FA002 | Intrepid LLC ARCHITECTURE SUPPORT SERVICE | $1.9M | Apr 13, 2027 |
Common questions
Who are the top DoD contractors for NAICS 541350?
In the latest 12 months, t2s, LLC ($20.4M), OST Inc ($19.2M), Kearney & Company, P.C. ($13.1M) received the most DoD obligations for building inspection services.
How concentrated is this market?
The eight largest primes held 92.9% of positive obligations, and t2s, LLC alone held 27.7%. 14 contractors won their first obligations in this market during the latest 12 months.
Are any large DoD NAICS 541350 contracts ending soon?
6 of the largest awards in this market reach their current end date in the next 18 months. The first is W9124M22P0004 (Southern Aire Contracting, Inc., $1.2M obligated), ending Nov 30, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
NAICS 541350 across all agencies
DHS · NAICS 541350
$29.2MUSDA · NAICS 541350
$14.1MVA · NAICS 541350
$6.9MFigures 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.
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