Top 100 Contractors in NAICS 54135: Building Inspection Services, FY2021

Name: Top 100 Contractors in NAICS 54135: Building Inspection Services, FY2021
Creator: GovTribe

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

The top 10 won 87% of FY2021 NAICS 54135 contract dollars

Contract obligations: $188,568,353 Net of deobligations, by contracts coded NAICS 54135 or a code under it
Contractors: 212 Parent companies with an obligation
Largest contractor: Vanguard Inspection Services $103 million, 46.2% 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	Vanguard Inspection Services Top agencies DHS (Department of Homeland Security)	$103,221,581	46.2%	Rank history: #1 in FY2022, #1 in FY2023, #2 in FY2024 and #1 in FY2025; up 1 since FY2020.
2	Parsons Brinckerhoff Holdings Inc. Through WSP USA Services Inc. Top agencies DHS (Department of Homeland Security)	$80,300,042	35.9%	Rank history: #2 in FY2022, #6 in FY2023, #6 in FY2024 and not on the FY2025 list; down 1 since FY2020.
3	Institute for Building Technology and Safety Top agencies HUD (Department of Housing and Urban Development)	$4,067,029	1.8%	Rank history: #5 in FY2022, #5 in FY2023, not on the FY2024 list and #3 in FY2025; up 1 since FY2020.
4	T1 Construction LLC Top agencies DOI (Department of the Interior)	$2,518,070	1.1%	Rank history: #7 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
5	Red River Resources LLC Top agencies DOI (Department of the Interior)	$1,006,259	0.5%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
6	PMA Associates, Inc. Top agencies HUD (Department of Housing and Urban Development)	$876,208	0.4%	Rank history: #9 in FY2022, #8 in FY2023, not on the FY2024 list and #15 in FY2025; new, not ranked in FY2020.
7	Mcdonough Bolyard Peck, Inc. 2 awardees Top agencies Smithsonian (Smithsonian Institution)	$794,328	0.4%	Rank history: #11 in FY2022, #59 in FY2023, #60 in FY2024 and #58 in FY2025; up 23 since FY2020.
8	Jenson Fire Protection Inc. Top agencies Army (Department of the Army)	$776,950	0.3%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
9	Project Solutions, Inc. Top agencies USDA (Department of Agriculture)	$625,429	0.3%	Rank history: #21 in FY2022, #23 in FY2023, #10 in FY2024 and not on the FY2025 list; up 1 since FY2020.
10	Parsons Corporation Through Parsons Government Services Inc. Top agencies Navy (Department of the Navy)	$571,717	0.3%	Rank history: #72 in FY2022, #12 in FY2023, #7 in FY2024 and #17 in FY2025; down 3 since FY2020.
11	DAV Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) Navy (Department of the Navy)	$558,829	0.3%	Rank history: #13 in FY2022, #37 in FY2023, not on the FY2024 list and #40 in FY2025; down 3 since FY2020.
12	Iveco SUD-West Nutzfahrzeuge GMBH Through Ati, Inc. Top agencies DOE (Department of Energy)	$500,000	0.2%	Rank history: #27 in FY2022, #11 in FY2023, #31 in FY2024 and not on the FY2025 list; up 5 since FY2020.
13	RBA Group the Through NV5 Consultants, Inc. Top agencies Smithsonian (Smithsonian Institution)	$467,191	0.2%	Rank history: #59 in FY2022, #81 in FY2023, #61 in FY2024 and #13 in FY2025; up 67 since FY2020.
14	Carcongroup Engineering PSC Top agencies DHS (Department of Homeland Security)	$465,098	0.2%	Rank history: #18 in FY2022, #15 in FY2023, #11 in FY2024 and #21 in FY2025; up 1 since FY2020.
15	Tepa, LLC Through Tehama ECS LLC Top agencies DOI (Department of the Interior)	$448,905	0.2%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
16	Industrial Supply Co Inc. Top agencies USAF (Department of the Air Force)	$422,605	0.2%	Rank history: #40 in FY2022, #76 in FY2023, #70 in FY2024 and #85 in FY2025; new, not ranked in FY2020.
17	Hdr, Inc. Through HDR Engineering Inc. Top agencies Army (Department of the Army)	$355,804	0.2%	Rank history: not on the FY2022 list, #54 in FY2023, #96 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
18	Jacobs Engineering Group Inc. Through Ch2M Hill - HDR JV Top agencies Army (Department of the Army)	$355,804	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	Property & Environmental Management Inc. Top agencies DOJ (Department of Justice)	$337,831	0.2%	Rank history: #60 in FY2022, #56 in FY2023, #53 in FY2024 and #90 in FY2025; up 81 since FY2020.
20	Arcadis N.V. Through Arcadis Consulting (Uk) Limited Top agencies USAF (Department of the Air Force)	$333,010	0.1%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
21	Gunn Building PTY Ltd Top agencies DOS (Department of State)	$311,046	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
22	New Horizon Design and Construction Management Company Limited Top agencies Army (Department of the Army)	$293,452	0.1%	Rank history: #41 in FY2022, #22 in FY2023, #34 in FY2024 and #16 in FY2025; down 11 since FY2020.
23	Territory Horticulture Top agencies DOS (Department of State)	$260,932	0.1%	Rank history: #30 in FY2022, #26 in FY2023, #26 in FY2024 and #43 in FY2025; new, not ranked in FY2020.
24	Heidelberg Resources, LLC Top agencies VA (Department of Veterans Affairs)	$250,259	0.1%	Rank history: not on the FY2022 list, #75 in FY2023, #54 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
25	RJK Construction LLC Top agencies USDA (Department of Agriculture)	$250,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	Pacificmark Construction Corp Top agencies USDA (Department of Agriculture)	$250,000	0.1%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
27	Southern Aire Contracting, Inc. Top agencies Army (Department of the Army)	$233,993	0.1%	Rank history: #28 in FY2022, #29 in FY2023, #27 in FY2024 and #32 in FY2025; up 8 since FY2020.
28	Slocum, Thomas Top agencies VA (Department of Veterans Affairs)	$220,322	0.1%	Rank history: #91 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; up 32 since FY2020.
29	Eaton Corporation Top agencies DOS (Department of State)	$214,148	0.1%	Rank history: #33 in FY2022, #32 in FY2023, #28 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
30	Cccs International LLC Top agencies USAF (Department of the Air Force)	$199,420	0.1%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
31	Neucomm Solutions, LLC Top agencies DOE (Department of Energy)	$180,897	0.1%	Rank history: #25 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; up 18 since FY2020.
32	Thomas A Carcaterra Pe LLC Top agencies Smithsonian (Smithsonian Institution)	$177,990	0.1%	Rank history: #20 in FY2022, #10 in FY2023, #23 in FY2024 and not on the FY2025 list; down 23 since FY2020.
33	Stephen Phillip Greene Top agencies GSA (General Services Administration)	$163,874	0.1%	Rank history: #34 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
34	Wrga Fire Training Solutions Inc. Top agencies USAF (Department of the Air Force)	$162,825	0.1%	Rank history: #43 in FY2022, #28 in FY2023, #39 in FY2024 and #71 in FY2025; up 47 since FY2020.
35	Aslan Technologies Inc. Top agencies DOS (Department of State)	$159,778	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	STC World Wide LLC Top agencies DOS (Department of State)	$152,728	0.1%	Rank history: not on the FY2022–FY2023 lists, #47 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
37	Kumm Michael Top agencies USAF (Department of the Air Force)	$146,667	0.1%	Rank history: #49 in FY2022, #38 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
38	Accura Engineering and Consulting Services, Inc. Top agencies HHS (Department of Health and Human Services)	$137,797	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
39	Safety Management Resources Corporation Top agencies DOI (Department of the Interior)	$133,678	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
40	Delta Fire Systems Inc. Through API Group Life Safety USA LLC Top agencies USAF (Department of the Air Force)	$129,546	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	Atlantic First Industries Corporation Top agencies VA (Department of Veterans Affairs)	$121,606	0.1%	Rank history: #42 in FY2022, #33 in FY2023, #18 in FY2024 and #35 in FY2025; up 45 since FY2020.
42	JHC Fire Containment Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$121,244	0.1%	Rank history: #31 in FY2022, #51 in FY2023, #57 in FY2024 and #53 in FY2025; up 28 since FY2020.
43	Franklin Young International, Incorporated Top agencies VA (Department of Veterans Affairs)	$113,116	0.1%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
44	DB Netz AG Regionalnetz Oberpfalz Top agencies Army (Department of the Army)	$112,993	0.1%	Rank history: #56 in FY2022, #39 in FY2023 and not on the FY2024–FY2025 lists; down 26 since FY2020.
45	Sanirail Construction GMBH Top agencies Army (Department of the Army)	$112,305	0.1%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
46	Multivariable Systems Tech, LLC Top agencies USAF (Department of the Air Force)	$108,000	<0.1%	Rank history: not on the FY2022–FY2023 lists, #52 in FY2024 and #70 in FY2025; down 26 since FY2020.
47	Vda, Inc. Top agencies GSA (General Services Administration)	$107,250	<0.1%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; up 55 since FY2020.
48	Yellow Bridge LLC Top agencies HHS (Department of Health and Human Services)	$106,913	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Bureau Veritas REG INT Navires Aeronefs Through National Elevator Inspection Services, Inc. Top agencies GSA (General Services Administration) Commerce (Department of Commerce) VA (Department of Veterans Affairs)	$104,094	<0.1%	Rank history: #68 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
50	Johnson Controls Security Solutions LLC 4 awardees, including Johnson Controls Fire Protection LP, Johnson Controls Building Automation Systems, LLC and Johnson Controls Inc. Top agencies VA (Department of Veterans Affairs) DOS (Department of State) GSA (General Services Administration)	$103,953	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 35 since FY2020.
51	Medical Gas Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$101,400	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Omni Elevator Co., Inc. Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) Army (Department of the Army)	$100,999	<0.1%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; down 19 since FY2020.
53	Esperanza International Services Southern Africa (PTY) Ltd Through Intertek Testing Services (South Africa) (Pty) Ltd Top agencies USAID (US Agency for International Development)	$100,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	Kirila Fire Training Facilities, Inc. Top agencies USAF (Department of the Air Force)	$96,551	<0.1%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; down 11 since FY2020.
55	RJY Group LLC Top agencies VA (Department of Veterans Affairs)	$94,197	<0.1%	Rank history: not on the FY2022 list, #93 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
56	Bayline Lift Technologies LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DOI (Department of the Interior)	$90,396	<0.1%	Rank history: #22 in FY2022, #69 in FY2023 and not on the FY2024–FY2025 lists; down 33 since FY2020.
57	Rd3, Inc. Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs)	$86,516	<0.1%	Rank history: #32 in FY2022, #16 in FY2023, #25 in FY2024 and #30 in FY2025; up 8 since FY2020.
58	ATI S.R.L. Architettura Tecnica Italiana Top agencies DOS (Department of State)	$84,724	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
59	Cap Architecture Inc. Top agencies USDA (Department of Agriculture)	$84,550	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 25 since FY2020.
60	Cleaver-Brooks Inc. Top agencies DOS (Department of State)	$79,100	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Southco Services LLC Top agencies VA (Department of Veterans Affairs)	$77,880	<0.1%	Rank history: #24 in FY2022, #21 in FY2023, #20 in FY2024 and #23 in FY2025; new, not ranked in FY2020.
62	Design Build Consortium, LLC Top agencies VA (Department of Veterans Affairs)	$77,540	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 62 since FY2020.
63	Arizona State Boiler Inspectors, LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$75,326	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
64	Reliant Elevator Inspections & Consulting, Inc. Top agencies DOT (Department of Transportation)	$74,000	<0.1%	Rank history: not on the FY2022 list, #20 in FY2023, #85 in FY2024 and #54 in FY2025; new, not ranked in FY2020.
65	Cardinal Compliance Consultants, LLC Top agencies GSA (General Services Administration)	$72,612	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 34 since FY2020.
66	Alabama Controls, Inc. Top agencies DOS (Department of State)	$71,960	<0.1%	Rank history: not on the FY2022–FY2023 lists, #66 in FY2024 and #89 in FY2025; up 47 since FY2020.
67	Angela Rodrigues - Arquitectura LDA Top agencies DOS (Department of State)	$71,554	<0.1%	Rank history: #96 in FY2022, not on the FY2023 list, #50 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
68	Technical Loadarm Limited Top agencies Army (Department of the Army)	$66,950	<0.1%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
69	Edil Project S.R.L. Top agencies DOS (Department of State)	$65,811	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 52 since FY2020.
70	Caldaia Controls LLC Top agencies VA (Department of Veterans Affairs)	$64,100	<0.1%	Rank history: #62 in FY2022, not on the FY2023 list, #40 in FY2024 and #82 in FY2025; down 19 since FY2020.
71	Arias-Guardia & Asoc. Top agencies Smithsonian (Smithsonian Institution)	$62,921	<0.1%	Rank history: #23 in FY2022, #18 in FY2023, #17 in FY2024 and #19 in FY2025; up 16 since FY2020.
72	IO Environmental and Infrastructure Incorporated Top agencies VA (Department of Veterans Affairs)	$62,561	<0.1%	Rank history: #89 in FY2022, #74 in FY2023, #62 in FY2024 and not on the FY2025 list; down 1 since FY2020.
73	Bradford Roof Management, Inc. Top agencies Army (Department of the Army)	$60,719	<0.1%	Rank history: #90 in FY2022, #80 in FY2023, #69 in FY2024 and #95 in FY2025; unchanged since FY2020.
74	Media Plumbing & Heating Inc. Top agencies VA (Department of Veterans Affairs)	$60,000	<0.1%	Rank history: #92 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; down 60 since FY2020.
75	Technical Safety Services, LLC Top agencies VA (Department of Veterans Affairs)	$59,310	<0.1%	Rank history: #88 in FY2022, #86 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
76	Greenefficient Inc. Top agencies VA (Department of Veterans Affairs)	$58,849	<0.1%	Rank history: not on the FY2022 list, #92 in FY2023, #88 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
77	United Supply Alliance Inc. Top agencies DOS (Department of State)	$57,080	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Nancy ST Laurent Top agencies VA (Department of Veterans Affairs)	$57,000	<0.1%	Rank history: #93 in FY2022, #58 in FY2023, #77 in FY2024 and #96 in FY2025; new, not ranked in FY2020.
79	Atis Elevator Inspections LLC Top agencies VA (Department of Veterans Affairs)	$56,464	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 99 since FY2020.
80	Elevator Consulting & Design Top agencies VA (Department of Veterans Affairs)	$54,450	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 24 since FY2020.
81	Alaska Air Balancing, Inc. Top agencies DOT (Department of Transportation)	$52,200	<0.1%	Rank history: not on the FY2022 list, #89 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
82	Pacific Coast Contracting Group Top agencies VA (Department of Veterans Affairs)	$50,640	<0.1%	Rank history: not on the FY2022 list, #91 in FY2023, #90 in FY2024 and not on the FY2025 list; down 10 since FY2020.
83	Inspection Experts Inc. Top agencies DOS (Department of State)	$48,785	<0.1%	Rank history: #81 in FY2022, #52 in FY2023, not on the FY2024 list and #56 in FY2025; down 5 since FY2020.
84	EOC Solutions LLC Top agencies VA (Department of Veterans Affairs)	$46,400	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
85	Triangle Manifold Services, Inc. Top agencies VA (Department of Veterans Affairs)	$45,511	<0.1%	Rank history: #95 in FY2022, #64 in FY2023, #80 in FY2024 and not on the FY2025 list; down 32 since FY2020.
86	Superstructures Engineering + Architecture, PLLC Top agencies DOT (Department of Transportation)	$42,116	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 64 since FY2020.
87	Unks Construction, Inc. Top agencies USAF (Department of the Air Force)	$42,090	<0.1%	Rank history: #84 in FY2022, not on the FY2023 list, #93 in FY2024 and not on the FY2025 list; down 33 since FY2020.
88	Haskoningdhv Nederland B.V. Through Haskoning Nederland B.V. Top agencies USAF (Department of the Air Force)	$41,240	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Ivey Engineering, Inc. Top agencies USDA (Department of Agriculture)	$40,000	<0.1%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
90	Alliance Medical Gas Top agencies VA (Department of Veterans Affairs)	$38,750	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
91	Hall Fire Safety Consulting LLC Top agencies VA (Department of Veterans Affairs)	$38,532	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 68 since FY2020.
92	Endevelopment L.L.C. Top agencies VA (Department of Veterans Affairs)	$38,500	<0.1%	Rank history: not on the FY2022–FY2023 lists, #97 in FY2024 and #100 in FY2025; new, not ranked in FY2020.
93	Fp&C Consultants KC LLC Top agencies USAF (Department of the Air Force)	$37,750	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Evergreen Medical Services, LLC Top agencies VA (Department of Veterans Affairs)	$37,658	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 18 since FY2020.
95	Mass Tank Inspection Services LLC Top agencies Army (Department of the Army)	$36,646	<0.1%	Rank history: not on the FY2022 list, #79 in FY2023, #99 in FY2024 and not on the FY2025 list; down 3 since FY2020.
96	EA Engineering, Science, and Technology, Inc., PBC Top agencies Army (Department of the Army)	$36,544	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Stronghand LLC Top agencies VA (Department of Veterans Affairs)	$34,232	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 38 since FY2020.
98	Initial Saudi Arabia Ltd Top agencies DOS (Department of State)	$33,043	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
99	HKA Elevator Consulting, Inc. Top agencies GSA (General Services Administration)	$33,001	<0.1%	Rank history: not on the FY2022 list, #61 in FY2023, #37 in FY2024 and not on the FY2025 list; down 5 since FY2020.
100	Albireo Energy LLC Through Alabama Controls, Inc. Top agencies DOS (Department of State)	$32,794	<0.1%	Rank history: #63 in FY2022 and not on the FY2023–FY2025 lists; down 64 since FY2020.

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100 of 212 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 54135

Code	Net obligations	Largest contractor
541350 Building Inspection Services	$188,568,353	Vanguard Inspection Services

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 $223 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. 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 NAICS 54135 contractors in FY2021?

1. Vanguard Inspection Services ($103M), 2. Parsons Brinckerhoff Holdings Inc. ($80.3M), 3. Institute for Building Technology and Safety ($4.07M), 4. T1 Construction LLC ($2.52M), 5. Red River Resources LLC ($1.01M), 6. PMA Associates, Inc. ($876K), 7. Mcdonough Bolyard Peck, Inc. ($794K), 8. Jenson Fire Protection Inc. ($777K), 9. Project Solutions, Inc. ($625K), 10. Parsons Corporation ($572K).

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