Top 100 Contractors in PSC C2: Architect-Engineering Services – General, FY2021

Name: Top 100 Contractors in PSC C2: Architect-Engineering Services – General, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 27% of FY2021 PSC C2 contract dollars

Contract obligations: $3,570,037,091 Net of deobligations, by contracts coded PSC C2 or a code under it
Contractors: 1,573 Parent companies with an obligation
Largest contractor: Caddell Construction Co., Inc. $210 million, 5.0% of obligations
Data as of: Oct 14, 2026

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	Caddell Construction Co., Inc. Through Caddell Construction Co. (De), LLC Top agencies DOS (Department of State)	$210,007,384	5.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
2	Hdr, Inc. 38 awardees, including HDR Environmental, Operations and Construction, Inc., HDR Engineering, Inc of the Carolinas and Hdr-Gannett Fleming JV Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$196,012,206	4.6%	Rank history: #3 in FY2022, #3 in FY2023, #4 in FY2024 and #3 in FY2025; up 2 since FY2020.
3	AECOM 33 awardees, including AECOM Technical Services, Inc., Aecom-Baker-Cardno Navfac Atlantic Planning JV and AECOM International Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$152,493,019	3.6%	Rank history: #2 in FY2022, #1 in FY2023, #9 in FY2024 and #11 in FY2025; down 2 since FY2020.
4	Tetra Tech, Inc. 25 awardees Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$119,146,630	2.8%	Rank history: #5 in FY2022, #5 in FY2023, #7 in FY2024 and #7 in FY2025; down 1 since FY2020.
5	Burns & Mcdonnell, Inc. 3 awardees, including Burns & Mcdonnell Engineering Company, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$99,129,559	2.3%	Rank history: #6 in FY2022, #4 in FY2023, #16 in FY2024 and not on the FY2025 list; up 1 since FY2020.
6	The Compass PTS JV Top agencies DHS (Department of Homeland Security)	$91,982,343	2.2%	Rank history: #19 in FY2022, #7 in FY2023, #25 in FY2024 and #42 in FY2025; up 2 since FY2020.
7	Jacobs Engineering Group Inc. 34 awardees, including Ch2M Hill, Inc., Jacobs Government Services Co and Amentum Technology, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$78,558,286	1.9%	Rank history: #4 in FY2022, #2 in FY2023, #43 in FY2024 and not on the FY2025 list; down 5 since FY2020.
8	Starr II, A Joint Venture Top agencies DHS (Department of Homeland Security)	$74,768,966	1.8%	Rank history: #17 in FY2022, #14 in FY2023, #20 in FY2024 and #41 in FY2025; up 1 since FY2020.
9	Northrop Grumman Corporation 3 awardees, including Orbital Sciences LLC and Northrop Grumman Systems Corporation Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Navy (Department of the Navy)	$50,236,275	1.2%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
10	Jacobs / Hdr, A Joint Venture (Navfac Atlantic Srm) Top agencies Navy (Department of the Navy)	$46,683,407	1.1%	Rank history: not on the FY2022 list, #33 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
11	Camp Dresser & Mckee Inc. 8 awardees, including CDM International Inc. and CDM Federal Programs Corporation Top agencies USAID (US Agency for International Development) Army (Department of the Army) EPA (Environmental Protection Agency)	$46,099,833	1.1%	Rank history: #16 in FY2022, #30 in FY2023, #59 in FY2024 and not on the FY2025 list; down 1 since FY2020.
12	Sea Pac Engineering Inc. Top agencies DOS (Department of State)	$44,043,372	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
13	RBA Group the 4 awardees, including NV5 Geospatial, Inc., NV5 Consultants, Inc. and Geodynamics LLC Top agencies DOI (Department of the Interior) Army (Department of the Army) DOS (Department of State)	$39,714,243	0.9%	Rank history: #11 in FY2022, #11 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
14	Black & Veatch Special Projects Corp. Top agencies Army (Department of the Army) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$39,187,836	0.9%	Rank history: #68 in FY2022, #16 in FY2023, #15 in FY2024 and #14 in FY2025; up 22 since FY2020.
15	EA Engineering, Science, and Technology, Inc., PBC 2 awardees Top agencies EPA (Environmental Protection Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$38,542,441	0.9%	Rank history: #24 in FY2022, #68 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
16	Jacobs Government Services Company 2 awardees Top agencies DOI (Department of the Interior) Army (Department of the Army) DOS (Department of State)	$34,934,530	0.8%	Rank history: #12 in FY2022, #6 in FY2023, #3 in FY2024 and #2 in FY2025; up 1 since FY2020.
17	AECOM HDR Galveston JV Top agencies Army (Department of the Army)	$33,179,570	0.8%	Rank history: not on the FY2022–FY2025 lists; up 32 since FY2020.
18	Michael Baker International, LLC 8 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$31,705,293	0.8%	Rank history: #30 in FY2022, #21 in FY2023, #13 in FY2024 and #25 in FY2025; up 23 since FY2020.
19	Arcadis N.V. 7 awardees, including Arcadis U.s., Inc., Arcadis Germany GMBH and Arcadis-Exp Federal JV Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) DHS (Department of Homeland Security)	$30,555,184	0.7%	Rank history: #14 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
20	Woolpert, Inc. 5 awardees, including Waller, Todd & Sadler, A Woolpert Company, LLC and Geomatics Data Solutions, A Woolpert Company, LLC Top agencies DOI (Department of the Interior) Army (Department of the Army) USAF (Department of the Air Force)	$30,130,468	0.7%	Rank history: #15 in FY2022, #32 in FY2023, #26 in FY2024 and #17 in FY2025; down 5 since FY2020.
21	SC Companies, Inc. 3 awardees, including Stanley Consultants, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$29,752,749	0.7%	Rank history: #7 in FY2022, #27 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
22	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. and Leidos Engineering LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Commerce (Department of Commerce)	$27,602,448	0.7%	Rank history: #31 in FY2022, #19 in FY2023, #19 in FY2024 and #22 in FY2025; up 26 since FY2020.
23	Trevet-Bay West Joint Venture, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$27,131,611	0.6%	Rank history: #40 in FY2022 and not on the FY2023–FY2025 lists; up 30 since FY2020.
24	Stantec Incorporated 14 awardees, including Stantec Consulting Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$26,948,513	0.6%	Rank history: #13 in FY2022 and not on the FY2023–FY2025 lists; down 12 since FY2020.
25	Parsons Corporation 4 awardees, including Parsons-Versar Joint Venture and Parsons Government Services Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$23,772,235	0.6%	Rank history: #29 in FY2022, #55 in FY2023, #49 in FY2024 and #20 in FY2025; down 18 since FY2020.
26	Jacobs / Ewingcole, A Joint Venture Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$23,685,068	0.6%	Rank history: #23 in FY2022, #39 in FY2023 and not on the FY2024–FY2025 lists; down 21 since FY2020.
27	Ea-Baker JV Top agencies DLA (Defense Logistics Agency)	$22,794,560	0.5%	Rank history: #34 in FY2022, #29 in FY2023, #41 in FY2024 and not on the FY2025 list; up 5 since FY2020.
28	The Dewberry Companies LC 5 awardees, including Dewberry Engineers Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army) DOJ (Department of Justice)	$20,530,406	0.5%	Rank history: #22 in FY2022, #17 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
29	Louis Berger U.S. Inc. 10 awardees, including WSP USA Inc., WSP USA Solutions Inc. and WSP USA Buildings Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) EPA (Environmental Protection Agency)	$19,459,698	0.5%	Rank history: #42 in FY2022 and not on the FY2023–FY2025 lists; down 10 since FY2020.
30	Ahtna Infrastructure & Technologies LLC Top agencies Commerce (Department of Commerce)	$19,064,895	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	Ch2M Hill, Inc. Top agencies Navy (Department of the Navy) EPA (Environmental Protection Agency) NASA (National Aeronautics and Space Administration)	$17,802,187	0.4%	Rank history: not on the FY2022–FY2023 lists, #5 in FY2024 and #9 in FY2025; up 55 since FY2020.
32	Clark Nexsen Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) Army (Department of the Army)	$17,501,034	0.4%	Rank history: #44 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; up 107 since FY2020.
33	Kleinfelder - Stantec Usace A Joint Venture Top agencies Army (Department of the Army)	$17,295,384	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
34	Asmd LLC Top agencies Navy (Department of the Navy)	$16,785,809	0.4%	Rank history: #57 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
35	Nicklaus Engineering, Inc. 2 awardees, including Multi-Mac JV and Nicklaus Amec JV Top agencies Navy (Department of the Navy)	$16,783,128	0.4%	Rank history: #41 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
36	Whitman Requardt & Associates LLP Top agencies Army (Department of the Army) Navy (Department of the Navy) DOS (Department of State)	$16,304,896	0.4%	Rank history: #38 in FY2022, #77 in FY2023, not on the FY2024 list and #84 in FY2025; up 101 since FY2020.
37	Science Applications International Corporation Top agencies Navy (Department of the Navy) Army (Department of the Army)	$15,574,688	0.4%	Rank history: not on the FY2022–FY2025 lists; up 336 since FY2020.
38	Baker Jacobs JV Top agencies Army (Department of the Army)	$15,353,312	0.4%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
39	MPR Associates, Inc. Top agencies Army (Department of the Army)	$14,836,668	0.4%	Rank history: #55 in FY2022, #41 in FY2023, #37 in FY2024 and not on the FY2025 list; up 19 since FY2020.
40	RLF and Sherlock Smith and Adams JV Top agencies Navy (Department of the Navy)	$14,127,655	0.3%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; up 60 since FY2020.
41	The Miller / Hull Partnership, LLP Top agencies DOS (Department of State)	$14,044,997	0.3%	Rank history: not on the FY2022–FY2025 lists; up 211 since FY2020.
42	URS Corporation Through Urs-Smithgroup Joint Venture Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$13,743,398	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Smithgroup Companies, Inc. Through Smithgroup, Inc. Top agencies SSA (Social Security Administration) EPA (Environmental Protection Agency) DOI (Department of the Interior)	$13,671,015	0.3%	Rank history: #63 in FY2022, #53 in FY2023, #83 in FY2024 and not on the FY2025 list; up 1 since FY2020.
44	Wood Environment & Infrastructure Solutions Inc. 3 awardees, including WSP USA Environment & Infrastructure Inc., WSP E&Is GMBH and Wood Programs Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$13,667,939	0.3%	Rank history: #48 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; down 18 since FY2020.
45	Goldenwolf - Ewingcole A Joint Venture LLC Top agencies DHA (Defense Health Agency) Army (Department of the Army)	$13,523,660	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
46	Fugro Geospatial Inc. 5 awardees, including Fugro USA Land, Inc., Fugro USA Marine, Inc. and Fugro Consult GMBH Top agencies DOI (Department of the Interior) Commerce (Department of Commerce) Army (Department of the Army)	$13,382,152	0.3%	Rank history: #49 in FY2022, #45 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
47	SBD Alliant, LLC Top agencies DHA (Defense Health Agency)	$13,282,708	0.3%	Rank history: #59 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2020.
48	Richard & Kennedy Architects, LLC Top agencies DOS (Department of State)	$13,185,218	0.3%	Rank history: #36 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
49	Aptim Federal Services LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) Navy (Department of the Navy)	$12,436,052	0.3%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
50	Cardno Emerging Markets USA Ltd. 3 awardees, including Stantec GS Inc. and Cardno Tec-Leidos, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$12,227,241	0.3%	Rank history: #46 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; down 19 since FY2020.
51	Marlon Blackwell Architects, P.a. Top agencies DOS (Department of State)	$11,807,141	0.3%	Rank history: not on the FY2022–FY2025 lists; up 164 since FY2020.
52	KAL Architects, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) VA (Department of Veterans Affairs)	$11,228,485	0.3%	Rank history: not on the FY2022–FY2023 lists, #68 in FY2024 and not on the FY2025 list; up 433 since FY2020.
53	RMF Engineering, Inc., P.C. Top agencies HHS (Department of Health and Human Services) DOS (Department of State) Army (Department of the Army)	$11,036,362	0.3%	Rank history: not on the FY2022–FY2023 lists, #85 in FY2024 and #87 in FY2025; up 27 since FY2020.
54	Multi-Media Environmental Compliance Group Top agencies Navy (Department of the Navy)	$10,784,264	0.3%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
55	Merrick-Rs & H Joint Venture LLP Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) Army (Department of the Army)	$10,706,937	0.3%	Rank history: not on the FY2022 list, #23 in FY2023, #88 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
56	Dj&A, P.C. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture) DOT (Department of Transportation)	$10,543,564	0.2%	Rank history: #51 in FY2022, #65 in FY2023, #69 in FY2024 and not on the FY2025 list; up 59 since FY2020.
57	Element Environmental, LLC Top agencies Navy (Department of the Navy)	$10,469,909	0.2%	Rank history: #85 in FY2022, not on the FY2023–FY2024 lists and #65 in FY2025; up 36 since FY2020.
58	Acuity - Pt&C, LLC Top agencies Army (Department of the Army) DOE (Department of Energy)	$10,364,353	0.2%	Rank history: #54 in FY2022, #73 in FY2023, #70 in FY2024 and #58 in FY2025; down 12 since FY2020.
59	Weston Solutions Holdings, Inc. 3 awardees, including Weston Solutions Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) DOT (Department of Transportation)	$10,272,520	0.2%	Rank history: not on the FY2022–FY2025 lists; up 50 since FY2020.
60	The Johnson-Mcadams Firm, P.a. Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) DOI (Department of the Interior)	$10,249,261	0.2%	Rank history: not on the FY2022 list, #81 in FY2023, #57 in FY2024 and not on the FY2025 list; up 19 since FY2020.
61	CDM Federal Services Europe Joint Venture Top agencies Army (Department of the Army)	$9,944,220	0.2%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
62	Vali Cooper International LLC Top agencies VA (Department of Veterans Affairs) DOE (Department of Energy) Army (Department of the Army)	$9,809,667	0.2%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; up 111 since FY2020.
63	Otie-Rs&H JV Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$9,709,578	0.2%	Rank history: not on the FY2022–FY2025 lists; down 39 since FY2020.
64	Cardno GS - AECOM Pacific JV Top agencies Navy (Department of the Navy)	$9,590,499	0.2%	Rank history: not on the FY2022 list, #43 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
65	KZF Design Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DHS (Department of Homeland Security)	$9,567,339	0.2%	Rank history: not on the FY2022–FY2025 lists; down 30 since FY2020.
66	Mndpi Pacific JV Top agencies Navy (Department of the Navy)	$9,337,488	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Anderson Engineering of Minnesota, LLC Top agencies VA (Department of Veterans Affairs)	$9,287,533	0.2%	Rank history: not on the FY2022–FY2023 lists, #81 in FY2024 and #68 in FY2025; up 109 since FY2020.
68	Merrick & Company 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$9,239,590	0.2%	Rank history: #64 in FY2022, #76 in FY2023 and not on the FY2024–FY2025 lists; down 29 since FY2020.
69	Macdonald-Bedford Mbp, A Joint Venture Top agencies Navy (Department of the Navy)	$8,681,741	0.2%	Rank history: #56 in FY2022, #80 in FY2023 and not on the FY2024–FY2025 lists; up 89 since FY2020.
70	Advancing Resilience In Communities Top agencies DHS (Department of Homeland Security)	$8,580,960	0.2%	Rank history: #9 in FY2022, #8 in FY2023, #18 in FY2024 and #53 in FY2025; new, not ranked in FY2020.
71	Baker-Tetra TECH JV Top agencies DLA (Defense Logistics Agency)	$8,487,178	0.2%	Rank history: not on the FY2022–FY2025 lists; up 13 since FY2020.
72	Moca Systems, Inc. 3 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$8,383,672	0.2%	Rank history: not on the FY2022–FY2025 lists; up 305 since FY2020.
73	Ch2M Hill Clark Nexsen Energy Partners JV Top agencies Navy (Department of the Navy)	$8,192,747	0.2%	Rank history: #71 in FY2022, #52 in FY2023, #27 in FY2024 and #56 in FY2025; up 61 since FY2020.
74	EXP U.S. Services Inc. 2 awardees, including EXP Federal Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$8,116,188	0.2%	Rank history: #78 in FY2022, not on the FY2023 list, #39 in FY2024 and #18 in FY2025; down 24 since FY2020.
75	Schmidt-Prime Group, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$8,022,343	0.2%	Rank history: #82 in FY2022, #72 in FY2023, #42 in FY2024 and #46 in FY2025; down 14 since FY2020.
76	WSP USA Solutions Inc. Top agencies DOI (Department of the Interior) DHS (Department of Homeland Security) Army (Department of the Army)	$7,955,482	0.2%	Rank history: #26 in FY2022, #36 in FY2023, #12 in FY2024 and not on the FY2025 list; up 404 since FY2020.
77	Utility Works A Joint Venture Top agencies Navy (Department of the Navy)	$7,946,115	0.2%	Rank history: #20 in FY2022, #84 in FY2023, #48 in FY2024 and #52 in FY2025; new, not ranked in FY2020.
78	Kenneth Hahn Architects Inc. Top agencies USAF (Department of the Air Force) DOI (Department of the Interior) Army (Department of the Army)	$7,904,301	0.2%	Rank history: not on the FY2022–FY2025 lists; up 47 since FY2020.
79	Liberty JV Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$7,706,103	0.2%	Rank history: #65 in FY2022, not on the FY2023–FY2024 lists and #95 in FY2025; new, not ranked in FY2020.
80	Leetex Group LLC Top agencies HUD (Department of Housing and Urban Development)	$7,698,536	0.2%	Rank history: not on the FY2022–FY2025 lists; up 83 since FY2020.
81	Jacobs and Architects Hawaii Joint Venture Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$7,659,430	0.2%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; up 69 since FY2020.
82	B.l. Harbert Holdings, L.L.C. Through BL Harbert International LLC Top agencies DOS (Department of State)	$7,512,691	0.2%	Rank history: #1 in FY2022 and not on the FY2023–FY2025 lists; up 79 since FY2020.
83	Olgoonik Federal, LLC Top agencies DOS (Department of State)	$7,509,720	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Vanasse Hangen Brustlin, Inc. 2 awardees Top agencies DOI (Department of the Interior)	$7,473,994	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	Mn-Bmcd JV Top agencies Navy (Department of the Navy)	$7,403,551	0.2%	Rank history: #39 in FY2022 and not on the FY2023–FY2025 lists; down 48 since FY2020.
86	Atkins Nuclear Secured Holdings Corporation 4 awardees, including Atkins North America, Inc. and Atkinsrealis USA Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$7,339,475	0.2%	Rank history: #60 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
87	Mantech-Aecom Joint Venture Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$7,320,892	0.2%	Rank history: not on the FY2022–FY2025 lists; up 35 since FY2020.
88	Transystems Corporation 3 awardees Top agencies DHS (Department of Homeland Security) Army (Department of the Army)	$7,224,209	0.2%	Rank history: not on the FY2022–FY2023 lists, #99 in FY2024 and not on the FY2025 list; up 112 since FY2020.
89	Smith Reynolds and Hills Inc 3 awardees, including Rs&H, Inc. Top agencies NASA (National Aeronautics and Space Administration) DECA (Defense Commissary Agency)	$7,153,166	0.2%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; up 32 since FY2020.
90	Towill Holding Company Inc Through Towill, Inc. Top agencies Army (Department of the Army)	$7,132,099	0.2%	Rank history: not on the FY2022–FY2025 lists; up 190 since FY2020.
91	Spur Design, LLC Top agencies VA (Department of Veterans Affairs)	$7,055,008	0.2%	Rank history: not on the FY2022–FY2025 lists; up 401 since FY2020.
92	The Day & Zimmermann Group, Inc. Through The Mason & Hanger Group Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$7,032,375	0.2%	Rank history: not on the FY2022 list, #47 in FY2023 and not on the FY2024–FY2025 lists; up 70 since FY2020.
93	Wiley Wilson Burns & Mcdonnell Joint Venture Top agencies Navy (Department of the Navy) USUHS (DOD Uniformed Services University of the Health Sciences) Army (Department of the Army)	$6,853,313	0.2%	Rank history: #99 in FY2022, #82 in FY2023, #51 in FY2024 and not on the FY2025 list; up 14 since FY2020.
94	Pond & Company 2 awardees Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency) Army (Department of the Army)	$6,520,553	0.2%	Rank history: #92 in FY2022, not on the FY2023 list, #45 in FY2024 and not on the FY2025 list; up 9 since FY2020.
95	Reid Middleton, Inc. 2 awardees Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) USAF (Department of the Air Force)	$6,504,387	0.2%	Rank history: #58 in FY2022, #95 in FY2023 and not on the FY2024–FY2025 lists; down 36 since FY2020.
96	MJ Engineering, Architecture, Landscape Architecture, and Land Surveying P.C. Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$6,466,124	0.2%	Rank history: not on the FY2022 list, #85 in FY2023 and not on the FY2024–FY2025 lists; up 132 since FY2020.
97	Shop Architects, Inc. Top agencies DOS (Department of State)	$6,453,089	0.2%	Rank history: not on the FY2022 list, #78 in FY2023 and not on the FY2024–FY2025 lists; down 50 since FY2020.
98	M Arthur Gensler JR & Associates Inc. 3 awardees Top agencies DHS (Department of Homeland Security) GSA (General Services Administration) HHS (Department of Health and Human Services)	$6,424,705	0.2%	Rank history: not on the FY2022 list, #83 in FY2023 and not on the FY2024–FY2025 lists; up 136 since FY2020.
99	Helber Hastert & Fee Planners Inc. Top agencies Navy (Department of the Navy) DIA (Defense Intelligence Agency)	$6,396,010	0.2%	Rank history: not on the FY2022–FY2024 lists and #57 in FY2025; up 9 since FY2020.
100	Yaeger Architecture Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$6,367,279	0.2%	Rank history: not on the FY2022–FY2025 lists; up 72 since FY2020.

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100 of 1,573 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC C2

Code	Net obligations	Largest contractor
C219 Other Architect and Engineering Services	$1,715,494,010	Hdr, Inc.
C211 Architect – Engineer Services (including landscaping, interior layout, and designing)	$1,065,791,555	AECOM
C215 A&E Production Engineering Services (including Design and Control, and Building Programming)	$264,853,269	Caddell Construction Co., Inc.
C212 Engineering Drafting Services	$220,108,250	AECOM HDR Galveston JV
C214 A&E Management Engineering Services	$118,721,852	EA Engineering, Science, and Technology, Inc., PBC
C213 A&E Inspection Services (non-construction)	$66,539,836	Sea Pac Engineering Inc.
C223 Architect and Engineering – General: Mechanical Systems	$55,687,016	Northrop Grumman Corporation
C220 Architect and Engineering – General: Structural Engineering	$29,443,226	Merrick & Company
C216 Marine Architect and Engineering Services	$16,941,386	Hdr, Inc.
C222 Architect and Engineering – General: Electrical Systems	$15,212,084	Gdm-Ae, 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 $4.22 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.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "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. The step from FY2020 takes the color of the rank change beside it.
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 C2 contractors in FY2021?

1. Caddell Construction Co., Inc. ($210M), 2. Hdr, Inc. ($196M), 3. AECOM ($152M), 4. Tetra Tech, Inc. ($119M), 5. Burns & Mcdonnell, Inc. ($99.1M), 6. The Compass PTS JV ($92M), 7. Jacobs Engineering Group Inc. ($78.6M), 8. Starr II, A Joint Venture ($74.8M), 9. Northrop Grumman Corporation ($50.2M), 10. Jacobs / Hdr, A Joint Venture (Navfac Atlantic Srm) ($46.7M).

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