Top 28 Contractors in PSC C1BZ: Architect and Engineering – Construction: Other Airfield Structures, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Parsons Corporation Through Ptsi Managed Services Inc. Top agencies DOT (Department of Transportation)	$322,029,623	83.8%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2023, #1 in FY2024 and #1 in FY2025; new, not ranked in Aug 2024–Jul 2025.
2	Nippo Corporation Top agencies USAF (Department of the Air Force)	$12,031,255	3.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
3	Jacobs Engineering Group Inc. 3 awardees, including Jacobs Government Services Company Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$3,662,134	1.0%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #19 in FY2025; up 3 since Aug 2024–Jul 2025.
4	Hdr, Inc. 2 awardees, including HDR Environmental, Operations and Construction, Inc. and HDR Engineering Inc. Top agencies USAF (Department of the Air Force)	$2,683,191	0.7%	Rank history: #17 in FY2021, #6 in FY2022, #4 in FY2023, not on the FY2024 list and #18 in FY2025; up 14 since Aug 2024–Jul 2025.
5	Citrine-Olsson JV LLC Top agencies Army (Department of the Army)	$1,572,381	0.4%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; up 7 since Aug 2024–Jul 2025.
6	Burns & Mcdonnell, Inc. Through Burns & Mcdonnell Engineering Company, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$1,265,667	0.3%	Rank history: #2 in FY2021, #4 in FY2022, #16 in FY2023, #12 in FY2024 and #5 in FY2025; new, not ranked in Aug 2024–Jul 2025.
7	The Haskell Company Through Benham - Mead & Hunt Top agencies USAF (Department of the Air Force)	$1,242,697	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
8	Ch2M Hill - HDR JV Top agencies USAF (Department of the Air Force)	$859,818	0.2%	Rank history: not on the FY2021–FY2023 lists, #18 in FY2024 and #7 in FY2025; up 6 since Aug 2024–Jul 2025.
9	Kekolu Contracting, LLC Top agencies USAF (Department of the Air Force)	$795,452	0.2%	Rank history: not on the FY2021–FY2024 lists and #10 in FY2025; new, not ranked in Aug 2024–Jul 2025.
10	Burns Wald-Hopkins Shambach Architects, Inc. Top agencies USAF (Department of the Air Force)	$778,494	0.2%	Rank history: not on the FY2021 list, #11 in FY2022, #26 in FY2023, #11 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
11	GHD Setiadi Kaula Joint Venture Top agencies Navy (Department of the Navy)	$774,655	0.2%	Rank history: #12 in FY2021, not on the FY2022–FY2023 lists, #15 in FY2024 and #9 in FY2025; up 9 since Aug 2024–Jul 2025.
12	Michael Baker International, Inc. Top agencies Navy (Department of the Navy)	$711,611	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
13	Jacobs / B&M A Joint Venture Top agencies Navy (Department of the Navy)	$686,459	0.2%	Rank history: #1 in FY2021, #5 in FY2022, #2 in FY2023, #4 in FY2024 and #2 in FY2025; down 10 since Aug 2024–Jul 2025.
14	Atkins - Black & Veatch - FSB JV Top agencies USAF (Department of the Air Force)	$524,344	0.1%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2023, not on the FY2024 list and #25 in FY2025; up 13 since Aug 2024–Jul 2025.
15	Westeast Design Group, LLC Top agencies Army (Department of the Army)	$493,123	0.1%	Rank history: not on the FY2021–FY2024 lists and #13 in FY2025; up 4 since Aug 2024–Jul 2025.
16	Paradigm CCW JV LLC Top agencies USAF (Department of the Air Force)	$356,008	0.1%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; new, not ranked in Aug 2024–Jul 2025.
17	Transystems Corporation Top agencies DHS (Department of Homeland Security)	$348,119	0.1%	Rank history: #7 in FY2021, not on the FY2022 list, #7 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
18	GEO / Stanley Joint Venture 2 Top agencies Army (Department of the Army)	$327,311	0.1%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; down 9 since Aug 2024–Jul 2025.
19	AECOM Through AECOM Technical Services, Inc. Top agencies Navy (Department of the Navy)	$298,022	0.1%	Rank history: #5 in FY2021, #9 in FY2022, #8 in FY2023, not on the FY2024 list and #11 in FY2025; new, not ranked in Aug 2024–Jul 2025.
20	Shrewsberry-Mead & Hunt SB Joint Venture Top agencies USAF (Department of the Air Force)	$294,641	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
21	Brooks Borg Skiles Architecture Engineering LLP Top agencies USAF (Department of the Air Force)	$130,955	<0.1%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; new, not ranked in Aug 2024–Jul 2025.
22	Jacobs / Ewingcole, A Joint Venture Top agencies Navy (Department of the Navy)	$128,588	<0.1%	Rank history: #16 in FY2021, #1 in FY2022, #24 in FY2023, #23 in FY2024 and #4 in FY2025; down 15 since Aug 2024–Jul 2025.
23	Shive-Hattery Inc. Top agencies USAF (Department of the Air Force)	$63,542	<0.1%	Rank history: not on the FY2021–FY2024 lists and #23 in FY2025; new, not ranked in Aug 2024–Jul 2025.
24	The Chenega Corporation 2 awardees, including Chenega Architecture and Design Solutions, LLC Top agencies USAF (Department of the Air Force)	$47,226	<0.1%	Rank history: #4 in FY2021, #3 in FY2022, #3 in FY2023, not on the FY2024 list and #3 in FY2025; new, not ranked in Aug 2024–Jul 2025.
25	Rs&H, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$16,092	<0.1%	Rank history: not on the FY2021 list, #16 in FY2022, #12 in FY2023, not on the FY2024 list and #14 in FY2025; new, not ranked in Aug 2024–Jul 2025.
26	LHB Inc. Top agencies USAF (Department of the Air Force)	$15,953	<0.1%	Rank history: #27 in FY2021, #13 in FY2022, #23 in FY2023, not on the FY2024 list and #26 in FY2025; new, not ranked in Aug 2024–Jul 2025.
27	Tetra Tech, Inc. Through Tetra TECH / Mead and Hunt Joint Venture Top agencies USAF (Department of the Air Force)	$14,512	<0.1%	Rank history: not on the FY2021–FY2023 lists, #27 in FY2024 and #15 in FY2025; down 12 since Aug 2024–Jul 2025.
28	RFS LLC Top agencies USAF (Department of the Air Force)	$8,769	<0.1%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023, not on the FY2024 list and #22 in FY2025; down 5 since Aug 2024–Jul 2025.

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 $384 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