Top 100 Contractors in NAICS 5416: Management, Scientific, and Technical Consulting Services, Jul 2025–Jun 2026
Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe
The top 10 won 29% of NAICS 5416 contract dollars from July 2025 through June 2026
Ranking facts
- Contract obligations
- $19,780,462,968 Net of deobligations, by contracts coded NAICS 5416 or a code under it
- Contractors
- 3,834 Parent companies with an obligation
- Largest contractor
- Reliance Steel & Aluminum Co. $1.47 billion, 6.8% of obligations
- Data as of
Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV
Full ranking
| Rank | Contractor | Net obligations | Share | Trend |
|---|---|---|---|---|
| 1 |
Reliance Steel & Aluminum Co.
Top agencies
|
$1,474,828,642 | ||
| 2 | $865,905,577 | |||
| 3 | $857,567,181 | |||
| 4 | $728,072,643 | |||
| 5 | $547,441,374 | |||
| 6 | $546,510,293 | |||
| 7 |
Guidehouse Inc.
|
$400,512,646 | ||
| 8 |
BC Partners LLP
Top agencies
|
$313,357,600 | ||
| 9 | $267,570,138 | |||
| 10 | $253,770,408 | |||
| 11 | $212,197,049 | |||
| 12 |
Serco Inc
|
$196,871,637 | ||
| 13 | $160,090,281 | |||
| 14 | $152,039,371 | |||
| 15 | $151,207,086 | |||
| 16 | $131,474,754 | |||
| 17 | $129,506,986 | |||
| 18 |
ICF International Inc.
|
$126,449,611 | ||
| 19 |
Parsons Corporation
Top agencies
|
$125,456,868 | ||
| 20 | $113,778,099 | |||
| 21 | $99,398,849 | |||
| 22 | $81,591,107 | |||
| 23 | $80,000,000 | |||
| 24 | $78,908,148 | |||
| 25 |
Acumen LLC
Top agencies
|
$77,866,113 | ||
| 26 | $77,016,244 | |||
| 27 | $75,019,913 | |||
| 28 | $74,494,706 | |||
| 29 | $69,935,020 | |||
| 30 |
ADC Ltd NM
Top agencies
|
$67,451,258 | ||
| 31 | $64,865,160 | |||
| 32 |
Human Technologies Corp
Top agencies
|
$61,739,914 | ||
| 33 | $61,475,996 | |||
| 34 | $60,673,852 | |||
| 35 | $60,281,648 | |||
| 36 | $58,973,753 | |||
| 37 | $57,154,632 | |||
| 38 | $57,052,099 | |||
| 39 | $57,004,712 | |||
| 40 |
Creative It Solutions LLC
Top agencies
|
$56,939,309 | ||
| 41 | $52,401,394 | |||
| 42 | $52,257,935 | |||
| 43 | $51,893,268 | |||
| 44 | $51,579,032 | |||
| 45 | $50,852,709 | |||
| 46 | $50,813,352 | |||
| 47 | $50,601,826 | |||
| 48 | $50,430,544 | |||
| 49 | $50,269,223 | |||
| 50 | $50,187,731 | |||
| 51 | $49,367,177 | |||
| 52 | $49,152,882 | |||
| 53 |
Goldbelt Incorporated
Top agencies
|
$48,816,015 | ||
| 54 | $48,796,327 | |||
| 55 | $46,747,491 | |||
| 56 | $46,611,933 | |||
| 57 |
V2X, Inc.
|
$46,530,700 | ||
| 58 | $46,495,075 | |||
| 59 | $46,187,769 | |||
| 60 |
Greenlight Group LLC
|
$45,705,716 | ||
| 61 |
Gulf South Research Corp
|
$45,478,715 | ||
| 62 | $44,728,531 | |||
| 63 | $44,086,072 | |||
| 64 | $43,820,251 | |||
| 65 |
Sapient Government Services Inc.
|
$43,815,656 | ||
| 66 |
Ernst & Young LLP
Top agencies
|
$42,258,507 | ||
| 67 | $42,002,580 | |||
| 68 | $41,033,823 | |||
| 69 | $40,964,318 | |||
| 70 | $40,709,833 | |||
| 71 |
Aptive HTG LLC
Top agencies
|
$40,461,411 | ||
| 72 | $40,425,684 | |||
| 73 | $39,693,551 | |||
| 74 | $39,181,951 | |||
| 75 | $39,065,912 | |||
| 76 | $39,030,321 | |||
| 77 | $38,497,625 | |||
| 78 | $38,380,236 | |||
| 79 | $38,163,715 | |||
| 80 | $37,833,469 | |||
| 81 |
Accenture Federal Services LLC
|
$37,677,886 | ||
| 82 |
Magellan Federal Inc.
|
$37,573,872 | ||
| 83 | $37,188,917 | |||
| 84 | $36,920,534 | |||
| 85 |
Weston Solutions Holdings Inc
Top agencies
|
$36,526,163 | ||
| 86 | $36,339,538 | |||
| 87 |
Titan Alpha LLC
Top agencies
|
$34,999,785 | ||
| 88 | $34,908,495 | |||
| 89 | $34,736,127 | |||
| 90 | $34,603,712 | |||
| 91 | $33,960,542 | |||
| 92 | $33,730,092 | |||
| 93 | $33,620,095 | |||
| 94 | $32,632,406 | |||
| 95 | $32,624,294 | |||
| 96 |
D&G Support Services LLC
|
$32,588,969 | ||
| 97 | $32,512,464 | |||
| 98 | $31,689,165 | |||
| 99 | $31,388,423 | |||
| 100 | $30,990,982 |
Show 75 more
100 of 3,834 contractors listed here. See the rest on GovTribe.
Rankings for the codes under NAICS 5416
| Code | Net obligations | Largest contractor |
|---|---|---|
| 54161 Management Consulting Services | $16,907,111,227 | Reliance Steel & Aluminum Co. |
| 54169 Other Scientific and Technical Consulting Services | $1,812,857,499 | General Dynamics Corporation |
| 54162 Environmental Consulting Services | $1,060,494,242 | 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 $21.8 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. 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 Jul 2024–Jun 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 Jul 2025–Jun 2026?
1. Reliance Steel & Aluminum Co. ($1.47B), 2. Acquisition Logistics LLC ($866M), 3. Deloitte ($858M), 4. Chemonics International, Inc. ($728M), 5. Booz Allen Hamilton Holding Corporation ($547M), 6. General Dynamics Corporation ($547M), 7. Guidehouse Inc. ($401M), 8. BC Partners LLP ($313M), 9. Lockheed Martin Corporation ($268M), 10. LMI Consulting, LLC ($254M).
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