Top 43 Contractors in PSC B517: Geological Studies, Aug 2025–Jul 2026
Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe
The latest 12 months. See the newest fiscal year's list: Top Contractors in PSC B517: Geological Studies, FY2025.
The top 10 won 58% of PSC B517 contract dollars from August 2025 through July 2026
Ranking facts
- Contract obligations
- $2,468,012 Net of deobligations, by contracts coded PSC B517
- Contractors
- 43 Parent companies with an obligation
- Largest contractor
- Athena Technologies Inc. $353 thousand, 13.6% of obligations
- Data as of
Contract actions from FPDS (SAM.gov). How the rankings work · Download all 43 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)
Full ranking
| Rank | Contractor | Net obligations | Share | Trend |
|---|---|---|---|---|
| 1 |
Athena Technologies Inc.
Top agencies
|
$352,575 | ||
| 2 |
Central Geotechnical Services LLC
Top agencies
|
$226,975 | ||
| 3 |
RE/Spec Inc.
Top agencies
|
$166,320 | ||
| 4 |
RTI Laboratories Inc.
Top agencies
|
$147,769 | ||
| 5 | $110,368 | |||
| 6 |
Geosep Services, LLC
Top agencies
|
$106,413 | ||
| 7 |
Lily Hanna Rich
Top agencies
|
$100,971 | ||
| 8 | $97,667 | |||
| 9 |
Airie LLC
Top agencies
|
$97,500 | ||
| 10 | $93,676 | |||
| 11 |
Ethan Hasenauer
Top agencies
|
$90,454 | ||
| 12 |
Charles Trexler
Top agencies
|
$90,000 | ||
| 13 |
Kevin Arizmendi
Top agencies
|
$86,000 | ||
| 14 | $81,258 | |||
| 15 |
Tritium Laboratory
Top agencies
|
$64,985 | ||
| 16 | $51,861 | |||
| 17 |
IAN R Jones
Top agencies
|
$49,981 | ||
| 18 | $40,672 | |||
| 19 |
Tatiana Hernandez
Top agencies
|
$39,081 | ||
| 20 |
Boise State University
Top agencies
|
$37,100 | ||
| 21 | $37,000 | |||
| 22 |
Zirchron LLC
Top agencies
|
$35,400 | ||
| 23 |
Ezra Bowers
Top agencies
|
$35,220 | ||
| 24 |
Teah Hiltbrand-Livoni
Top agencies
|
$27,189 | ||
| 25 | $24,423 | |||
| 26 |
Wortman, Laura Jean
Top agencies
|
$23,975 | ||
| 27 |
Thea Mary Schmit
Top agencies
|
$22,277 | ||
| 28 |
Abraham Jerome Underhill
Top agencies
|
$21,449 | ||
| 29 |
Heather Elliott
Top agencies
|
$19,998 | ||
| 30 |
Suvi Birch
Top agencies
|
$18,697 | ||
| 31 |
Commonwealth Scientific and Industrial Research Organisation
Top agencies
|
$16,800 | ||
| 32 |
Curtin University
Top agencies
|
$16,245 | ||
| 33 |
Theodore Joseph Umbrell
Top agencies
|
$16,000 | ||
| 34 |
University of South Carolina
Top agencies
|
$15,750 | ||
| 35 | $15,450 | |||
| 36 | $13,500 | |||
| 37 |
Als USA Inc.
Top agencies
|
$10,465 | ||
| 38 | $9,000 | |||
| 39 |
Alyssa Kate Hachmann
Top agencies
|
$8,063 | ||
| 40 |
Anna Kathryn Ashe
Top agencies
|
$8,026 | ||
| 41 |
Arizona Board of Regents
Top agencies
|
$7,699 | ||
| 42 |
Thermo Fisher Scientific Inc.
Top agencies
|
$4,570 | ||
| 43 |
Elise Brahana
Top agencies
|
$435 |
Show all 43
How this ranking works
- Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
- Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $2.59 million obligated before deobligations, so they never pass 100%.
- Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
- Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
- Rank changes compare with Aug 2024–Jul 2025. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
- Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list.
- Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.
Quick answers
Who were the top 10 PSC B517 contractors in Aug 2025–Jul 2026?
1. Athena Technologies Inc. ($353K), 2. Central Geotechnical Services LLC ($227K), 3. RE/Spec Inc. ($166K), 4. RTI Laboratories Inc. ($148K), 5. Nevada System of Higher Education ($110K), 6. Geosep Services, LLC ($106K), 7. Lily Hanna Rich ($101K), 8. University of Texas System ($97.7K), 9. Airie LLC ($97.5K), 10. Biomarker Technologies, Inc. ($93.7K).
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