Top 100 Contractors in NAICS 5416: Management, Scientific, and Technical Consulting Services, 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 NAICS 5416: Management, Scientific, and Technical Consulting Services, FY2025.
The top 10 won 27% of NAICS 5416 contract dollars from August 2025 through July 2026
Ranking facts
- Contract obligations
- $19,343,731,277 Net of deobligations, by contracts coded NAICS 5416 or a code under it
- Contractors
- 3,671 Parent companies with an obligation
- Largest contractor
- Reliance Steel & Aluminum Co. $1.47 billion, 6.9% of obligations
- Data as of
Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)
Full ranking
| Rank | Contractor | Net obligations | Share | Trend |
|---|---|---|---|---|
| 1 |
Reliance Steel & Aluminum Co.
Top agencies
|
$1,474,828,642 | ||
| 2 | $903,784,492 | |||
| 3 | $630,052,612 | |||
| 4 | $577,811,239 | |||
| 5 | $549,193,583 | |||
| 6 |
Guidehouse Inc.
|
$456,495,233 | ||
| 7 | $405,474,655 | |||
| 8 |
BC Partners LLP
Top agencies
|
$313,357,600 | ||
| 9 | $283,128,423 | |||
| 10 | $258,498,426 | |||
| 11 | $211,790,174 | |||
| 12 | $178,353,829 | |||
| 13 | $167,183,661 | |||
| 14 | $157,742,128 | |||
| 15 | $139,636,201 | |||
| 16 |
Parsons Corporation
Top agencies
|
$130,283,232 | ||
| 17 | $128,866,544 | |||
| 18 |
ICF International Inc.
|
$128,501,181 | ||
| 19 | $126,926,801 | |||
| 20 | $126,248,597 | |||
| 21 | $122,262,819 | |||
| 22 | $108,684,024 | |||
| 23 | $98,808,110 | |||
| 24 | $92,525,451 | |||
| 25 | $84,646,471 | |||
| 26 | $81,453,801 | |||
| 27 | $80,075,721 | |||
| 28 | $80,000,000 | |||
| 29 | $79,618,741 | |||
| 30 |
Acumen LLC
Top agencies
|
$74,494,880 | ||
| 31 | $74,486,106 | |||
| 32 |
Creative It Solutions LLC
Top agencies
|
$68,118,179 | ||
| 33 | $67,990,955 | |||
| 34 | $67,008,576 | |||
| 35 | $66,521,008 | |||
| 36 | $65,512,716 | |||
| 37 | $62,910,208 | |||
| 38 | $61,755,184 | |||
| 39 | $61,549,476 | |||
| 40 |
ADC Ltd NM
Top agencies
|
$61,113,029 | ||
| 41 |
Human Technologies Corp
Top agencies
|
$59,801,600 | ||
| 42 |
Gulf South Research Corp
|
$59,216,823 | ||
| 43 |
Sapient Government Services Inc.
|
$59,069,316 | ||
| 44 | $58,560,994 | |||
| 45 | $58,272,404 | |||
| 46 | $56,805,370 | |||
| 47 | $56,229,088 | |||
| 48 | $55,567,569 | |||
| 49 | $54,988,942 | |||
| 50 | $54,510,105 | |||
| 51 | $52,685,192 | |||
| 52 | $52,511,511 | |||
| 53 | $52,401,394 | |||
| 54 | $51,697,062 | |||
| 55 | $51,558,714 | |||
| 56 | $51,431,445 | |||
| 57 | $51,225,185 | |||
| 58 | $50,430,544 | |||
| 59 | $47,831,168 | |||
| 60 | $47,175,197 | |||
| 61 |
Greenlight Group LLC
|
$46,490,249 | ||
| 62 | $45,287,198 | |||
| 63 | $44,869,052 | |||
| 64 |
V2X, Inc.
|
$44,310,962 | ||
| 65 | $42,550,028 | |||
| 66 | $42,382,534 | |||
| 67 |
Aptive HTG LLC
Top agencies
|
$41,835,020 | ||
| 68 | $41,794,362 | |||
| 69 |
Titan Alpha LLC
Top agencies
|
$40,811,148 | ||
| 70 | $40,383,534 | |||
| 71 | $39,902,111 | |||
| 72 | $39,065,197 | |||
| 73 | $38,937,497 | |||
| 74 | $38,759,623 | |||
| 75 | $38,380,236 | |||
| 76 | $38,199,262 | |||
| 77 | $38,163,715 | |||
| 78 | $37,895,427 | |||
| 79 | $37,692,110 | |||
| 80 | $37,564,016 | |||
| 81 |
Ernst & Young LLP
Top agencies
|
$37,327,539 | ||
| 82 | $37,296,464 | |||
| 83 | $37,263,549 | |||
| 84 | $37,117,697 | |||
| 85 | $36,781,713 | |||
| 86 | $36,778,201 | |||
| 87 | $36,498,023 | |||
| 88 | $36,439,538 | |||
| 89 |
Accenture Federal Services LLC
|
$36,397,482 | ||
| 90 | $36,195,486 | |||
| 91 | $35,763,550 | |||
| 92 | $35,517,385 | |||
| 93 | $35,260,411 | |||
| 94 | $34,544,280 | |||
| 95 |
Magellan Federal Inc.
|
$34,508,228 | ||
| 96 | $33,993,635 | |||
| 97 | $33,891,842 | |||
| 98 | $33,739,129 | |||
| 99 | $33,218,724 | |||
| 100 |
Tribility LLC
Top agencies
|
$32,975,999 |
Show 75 more
100 of 3,671 contractors listed here. See the rest on GovTribe.
Rankings for the codes under NAICS 5416
| Code | Net obligations | Largest contractor |
|---|---|---|
| 54161 Management Consulting Services | $16,462,964,624 | Reliance Steel & Aluminum Co. |
| 54169 Other Scientific and Technical Consulting Services | $1,840,965,876 | General Dynamics Corporation |
| 54162 Environmental Consulting Services | $1,039,800,777 | Tetra Tech, Inc. |
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 $21.3 billion 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 NAICS 5416 contractors in Aug 2025–Jul 2026?
1. Reliance Steel & Aluminum Co. ($1.47B), 2. Deloitte ($904M), 3. Acquisition Logistics LLC ($630M), 4. General Dynamics Corporation ($578M), 5. Booz Allen Hamilton Holding Corporation ($549M), 6. Guidehouse Inc. ($456M), 7. Chemonics International, Inc. ($405M), 8. BC Partners LLP ($313M), 9. LMI Consulting, LLC ($283M), 10. Lockheed Martin Corporation ($258M).
On GovTribe
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