Top 100 Contractors in NAICS 54135: Building Inspection Services, Jul 2025–Jun 2026

Name: Top 100 Contractors in NAICS 54135: Building Inspection Services, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 57% of NAICS 54135 contract dollars from July 2025 through June 2026

Contract obligations: $79,241,769 Net of deobligations, by contracts coded NAICS 54135 or a code under it
Contractors: 226 Parent companies with an obligation
Largest contractor: T2S, LLC $20.4 million, 12.7% of obligations
Data as of: Oct 16, 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	T2S, LLC Top agencies Army (Department of the Army)	$20,447,451	12.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
2	OST Inc. Top agencies Army (Department of the Army)	$19,236,250	11.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
3	E.f. Kearney, Limited Through Kearney & Company, P.C. Top agencies USAF (Department of the Air Force)	$13,104,470	8.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
4	Analex Corporation Top agencies Army (Department of the Army)	$8,526,000	5.3%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; new, not ranked in Jul 2024–Jun 2025.
5	Jll-Rer Solutions, LLC Top agencies Army (Department of the Army)	$7,293,845	4.5%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2023, #3 in FY2024 and #4 in FY2025; down 2 since Jul 2024–Jun 2025.
6	Tribal One Technology, LLC Top agencies USDA (Department of Agriculture) HUD (Department of Housing and Urban Development)	$7,149,554	4.4%	Rank history: not on the FY2021 list, #8 in FY2022, #4 in FY2023, #4 in FY2024 and #5 in FY2025; down 2 since Jul 2024–Jun 2025.
7	Institute for Building Technology and Safety Top agencies HUD (Department of Housing and Urban Development)	$4,678,680	2.9%	Rank history: #3 in FY2021, #5 in FY2022, #5 in FY2023, not on the FY2024 list and #3 in FY2025; unchanged since Jul 2024–Jun 2025.
8	Data Computer Corporation of America Top agencies USAF (Department of the Air Force)	$3,809,419	2.4%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Jul 2024–Jun 2025.
9	ABT Global LLC Top agencies HHS (Department of Health and Human Services)	$3,522,849	2.2%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Jul 2024–Jun 2025.
10	BAE Systems Through BAE Systems Technology Solutions & Services Inc. Top agencies DHS (Department of Homeland Security)	$3,515,374	2.2%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; new, not ranked in Jul 2024–Jun 2025.
11	Riverside Research Institute Top agencies USAF (Department of the Air Force)	$2,719,051	1.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
12	Buchanan & Edwards Inc. Top agencies USDA (Department of Agriculture)	$2,340,011	1.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
13	Szpm-Alpha Mpjv Top agencies USDA (Department of Agriculture)	$2,123,474	1.3%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; up 51 since Jul 2024–Jun 2025.
14	Mathematica Inc. Top agencies HHS (Department of Health and Human Services)	$1,500,249	0.9%	Rank history: not on the FY2021–FY2024 lists and #10 in FY2025; new, not ranked in Jul 2024–Jun 2025.
15	Knowesis, Inc. Top agencies DHA (Defense Health Agency)	$1,358,291	0.8%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; new, not ranked in Jul 2024–Jun 2025.
16	Intrepid LLC Top agencies Army (Department of the Army)	$1,115,818	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
17	Blue Construction Services LLC Top agencies Army (Department of the Army)	$854,112	0.5%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #11 in FY2025; down 7 since Jul 2024–Jun 2025.
18	Systems Planning and Analysis, Inc. Top agencies USAF (Department of the Air Force)	$803,426	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
19	Great Hill Solutions, LLC Top agencies USAF (Department of the Air Force)	$759,265	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
20	Parsons Corporation Through Parsons Government Services Inc. Top agencies Navy (Department of the Navy)	$721,228	0.4%	Rank history: #10 in FY2021, #72 in FY2022, #12 in FY2023, #7 in FY2024 and #17 in FY2025; down 9 since Jul 2024–Jun 2025.
21	New Horizon Design and Construction Management Company Limited Top agencies Army (Department of the Army)	$649,746	0.4%	Rank history: #22 in FY2021, #41 in FY2022, #22 in FY2023, #34 in FY2024 and #16 in FY2025; up 32 since Jul 2024–Jun 2025.
22	Carcongroup Engineering PSC Top agencies DHS (Department of Homeland Security)	$454,872	0.3%	Rank history: #14 in FY2021, #18 in FY2022, #15 in FY2023, #11 in FY2024 and #21 in FY2025; down 6 since Jul 2024–Jun 2025.
23	Global, Inc. Top agencies HHS (Department of Health and Human Services)	$445,426	0.3%	Rank history: not on the FY2021–FY2023 lists, #15 in FY2024 and #22 in FY2025; new, not ranked in Jul 2024–Jun 2025.
24	Hurtvet Subcontracting LLC Top agencies VA (Department of Veterans Affairs)	$436,982	0.3%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; down 4 since Jul 2024–Jun 2025.
25	Project Solutions, Inc. Top agencies USDA (Department of Agriculture)	$423,682	0.3%	Rank history: #9 in FY2021, #21 in FY2022, #23 in FY2023, #10 in FY2024 and not on the FY2025 list; up 2 since Jul 2024–Jun 2025.
26	General Service Contracting, LLC Top agencies VA (Department of Veterans Affairs)	$409,364	0.3%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	Dayton Group Inc Top agencies DOE (Department of Energy)	$400,750	0.2%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; down 6 since Jul 2024–Jun 2025.
28	Georgia Commercial and Residential Elevator, LLC Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$368,900	0.2%	Rank history: not on the FY2021 list, #51 in FY2022, not on the FY2023 list, #94 in FY2024 and #24 in FY2025; up 100 since Jul 2024–Jun 2025.
29	Southco Services LLC Top agencies VA (Department of Veterans Affairs)	$344,575	0.2%	Rank history: #61 in FY2021, #24 in FY2022, #21 in FY2023, #20 in FY2024 and #23 in FY2025; down 11 since Jul 2024–Jun 2025.
30	Bryant Power Solutions L.l.c Top agencies VA (Department of Veterans Affairs)	$335,975	0.2%	Rank history: not on the FY2021–FY2024 lists and #29 in FY2025; new, not ranked in Jul 2024–Jun 2025.
31	DAV Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$334,441	0.2%	Rank history: #11 in FY2021, #13 in FY2022, #37 in FY2023, not on the FY2024 list and #40 in FY2025; up 170 since Jul 2024–Jun 2025.
32	Azimuth Contracting, LLC Top agencies VA (Department of Veterans Affairs)	$317,750	0.2%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; new, not ranked in Jul 2024–Jun 2025.
33	Arias-Guardia & Asoc. Top agencies Smithsonian (Smithsonian Institution)	$306,812	0.2%	Rank history: #71 in FY2021, #23 in FY2022, #18 in FY2023, #17 in FY2024 and #19 in FY2025; down 18 since Jul 2024–Jun 2025.
34	Lalini Enterprises LLC Top agencies Army (Department of the Army)	$284,094	0.2%	Rank history: not on the FY2021–FY2023 lists, #45 in FY2024 and #36 in FY2025; up 5 since Jul 2024–Jun 2025.
35	Diversified Site Services LLC Top agencies VA (Department of Veterans Affairs)	$268,300	0.2%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; new, not ranked in Jul 2024–Jun 2025.
36	Territory Horticulture Top agencies DOS (Department of State)	$259,293	0.2%	Rank history: #23 in FY2021, #30 in FY2022, #26 in FY2023, #26 in FY2024 and #43 in FY2025; unchanged since Jul 2024–Jun 2025.
37	Southern Aire Contracting, Inc. Top agencies Army (Department of the Army)	$246,961	0.2%	Rank history: #27 in FY2021, #28 in FY2022, #29 in FY2023, #27 in FY2024 and #32 in FY2025; up 1 since Jul 2024–Jun 2025.
38	Multivariable Systems Tech, LLC Top agencies USAF (Department of the Air Force)	$246,185	0.2%	Rank history: #46 in FY2021, not on the FY2022–FY2023 lists, #52 in FY2024 and #70 in FY2025; up 21 since Jul 2024–Jun 2025.
39	Optimum Low Voltage LLC Top agencies DOI (Department of the Interior)	$237,798	0.1%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; up 74 since Jul 2024–Jun 2025.
40	Windjammer Environmental LLC Top agencies USDA (Department of Agriculture)	$233,245	0.1%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and #50 in FY2025; up 25 since Jul 2024–Jun 2025.
41	Fire Protection Service Corp Top agencies VA (Department of Veterans Affairs)	$232,916	0.1%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; down 7 since Jul 2024–Jun 2025.
42	WRG Fire Training Simulation Systems Inc. Top agencies USAF (Department of the Air Force)	$221,698	0.1%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; up 95 since Jul 2024–Jun 2025.
43	Einhäupl Gesellschaft MIT Beschränkter Haftung Top agencies Army (Department of the Army)	$220,803	0.1%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; up 65 since Jul 2024–Jun 2025.
44	Blackrock Institutional Trust Company National Association 2 awardees, including Summit Fire & Security LLC and Summit Fire Protection Co Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$207,325	0.1%	Rank history: not on the FY2021–FY2024 lists and #67 in FY2025; up 108 since Jul 2024–Jun 2025.
45	Atlantic First Industries Corporation Top agencies VA (Department of Veterans Affairs)	$190,906	0.1%	Rank history: #41 in FY2021, #42 in FY2022, #33 in FY2023, #18 in FY2024 and #35 in FY2025; down 13 since Jul 2024–Jun 2025.
46	SDV Services, Inc. Top agencies VA (Department of Veterans Affairs)	$190,260	0.1%	Rank history: not on the FY2021 list, #39 in FY2022, #34 in FY2023, #41 in FY2024 and #45 in FY2025; down 11 since Jul 2024–Jun 2025.
47	Final Limit Elevator Inspections LLC Top agencies VA (Department of Veterans Affairs)	$181,720	0.1%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2023, #49 in FY2024 and #51 in FY2025; up 9 since Jul 2024–Jun 2025.
48	Property & Environmental Management Inc. Top agencies DOJ (Department of Justice)	$179,009	0.1%	Rank history: #19 in FY2021, #60 in FY2022, #56 in FY2023, #53 in FY2024 and #90 in FY2025; up 120 since Jul 2024–Jun 2025.
49	Mccright & Associates, LLC Top agencies USDA (Department of Agriculture)	$176,718	0.1%	Rank history: not on the FY2021 list, #61 in FY2022, #44 in FY2023, #29 in FY2024 and #48 in FY2025; down 8 since Jul 2024–Jun 2025.
50	Tekton CC, LLC Top agencies VA (Department of Veterans Affairs)	$171,846	0.1%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2023, #43 in FY2024 and #37 in FY2025; down 10 since Jul 2024–Jun 2025.
51	Thomas A Carcaterra Pe LLC Top agencies Smithsonian (Smithsonian Institution)	$166,205	0.1%	Rank history: #32 in FY2021, #20 in FY2022, #10 in FY2023, #23 in FY2024 and not on the FY2025 list; up 23 since Jul 2024–Jun 2025.
52	Innovative Support Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$164,271	0.1%	Rank history: not on the FY2021–FY2023 lists, #38 in FY2024 and #74 in FY2025; up 10 since Jul 2024–Jun 2025.
53	Volter Electrical Construction Corp Top agencies DOJ (Department of Justice)	$162,842	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
54	Barque Consulting, LLC Top agencies VA (Department of Veterans Affairs)	$156,404	0.1%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; up 31 since Jul 2024–Jun 2025.
55	Temperature Control Services, L.L.C. Top agencies DOS (Department of State)	$154,702	0.1%	Rank history: not on the FY2021–FY2023 lists, #63 in FY2024 and #39 in FY2025; down 22 since Jul 2024–Jun 2025.
56	Isaiah Engineering, Inc. Top agencies USDA (Department of Agriculture)	$153,585	0.1%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; new, not ranked in Jul 2024–Jun 2025.
57	Georgia Department of Agriculture Top agencies HHS (Department of Health and Human Services)	$152,731	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
58	Eleven Bravo Group, LLC Top agencies VA (Department of Veterans Affairs)	$149,363	0.1%	Rank history: not on the FY2021–FY2024 lists and #87 in FY2025; up 15 since Jul 2024–Jun 2025.
59	Wrga Fire Training Solutions Inc. Top agencies USAF (Department of the Air Force)	$144,785	0.1%	Rank history: #34 in FY2021, #43 in FY2022, #28 in FY2023, #39 in FY2024 and #71 in FY2025; down 1 since Jul 2024–Jun 2025.
60	BBL Bahnbau Lüneburg GMBH Top agencies Army (Department of the Army)	$143,247	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
61	DB Netz Aktiengesellschaft Through DB Infrago Aktiengesellschaft Top agencies Army (Department of the Army)	$142,212	0.1%	Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #57 in FY2025; down 15 since Jul 2024–Jun 2025.
62	Community Fire Protection Top agencies DOI (Department of the Interior)	$141,335	0.1%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Jul 2024–Jun 2025.
63	Rd3, Inc. Top agencies GSA (General Services Administration) Commerce (Department of Commerce)	$138,372	0.1%	Rank history: #57 in FY2021, #32 in FY2022, #16 in FY2023, #25 in FY2024 and #30 in FY2025; down 37 since Jul 2024–Jun 2025.
64	Design for Health Environmental Education Center, Pacific Rim Division, Inc. Top agencies VA (Department of Veterans Affairs)	$131,081	0.1%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and #59 in FY2025; down 15 since Jul 2024–Jun 2025.
65	EDL Construction Inc. Top agencies USAF (Department of the Air Force)	$125,519	0.1%	Rank history: not on the FY2021 list, #46 in FY2022, not on the FY2023 list, #56 in FY2024 and #75 in FY2025; down 2 since Jul 2024–Jun 2025.
66	Catalyst Diving, Inc. Top agencies DOI (Department of the Interior)	$125,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; new, not ranked in Jul 2024–Jun 2025.
67	J3 Enterprise LLC Top agencies VA (Department of Veterans Affairs)	$124,279	0.1%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; up 97 since Jul 2024–Jun 2025.
68	Caldaia Controls LLC Top agencies VA (Department of Veterans Affairs)	$117,740	0.1%	Rank history: #70 in FY2021, #62 in FY2022, not on the FY2023 list, #40 in FY2024 and #82 in FY2025; up 2 since Jul 2024–Jun 2025.
69	All In Express Inc. Top agencies VA (Department of Veterans Affairs)	$116,999	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
70	Aurora Industrial Hygiene Top agencies VA (Department of Veterans Affairs)	$111,566	0.1%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023, #22 in FY2024 and #69 in FY2025; down 45 since Jul 2024–Jun 2025.
71	Sentinel Services, LLC Top agencies VA (Department of Veterans Affairs)	$110,625	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
72	J. Groenewald Properties CC Top agencies DOS (Department of State)	$101,882	0.1%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; new, not ranked in Jul 2024–Jun 2025.
73	Enviros LLC Top agencies VA (Department of Veterans Affairs)	$96,528	0.1%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; down 7 since Jul 2024–Jun 2025.
74	NV5 Global, Inc. Through NV5 Consultants, Inc. Top agencies Smithsonian (Smithsonian Institution)	$96,503	0.1%	Rank history: #13 in FY2021, #59 in FY2022, #81 in FY2023, #61 in FY2024 and #13 in FY2025; down 62 since Jul 2024–Jun 2025.
75	Veteran Elevator Inspection Services, LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$89,755	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
76	JHC Fire Containment Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$85,950	0.1%	Rank history: #42 in FY2021, #31 in FY2022, #51 in FY2023, #57 in FY2024 and #53 in FY2025; down 34 since Jul 2024–Jun 2025.
77	Insparisk, LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$84,856	0.1%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023, #86 in FY2024 and #62 in FY2025; down 20 since Jul 2024–Jun 2025.
78	Brainstorm Technologies LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$73,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; new, not ranked in Jul 2024–Jun 2025.
79	PBG Ventures LLC Top agencies DOS (Department of State)	$71,524	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
80	Heat Group Ltd Top agencies Army (Department of the Army)	$68,250	<0.1%	Rank history: not on the FY2021 list, #82 in FY2022, #77 in FY2023, #72 in FY2024 and #88 in FY2025; down 5 since Jul 2024–Jun 2025.
81	Mcdonough Bolyard Peck, Inc. Top agencies Smithsonian (Smithsonian Institution)	$65,207	<0.1%	Rank history: #7 in FY2021, #11 in FY2022, #59 in FY2023, #60 in FY2024 and #58 in FY2025; down 4 since Jul 2024–Jun 2025.
82	Cooper Fire Protection Services Inc. Top agencies HHS (Department of Health and Human Services)	$64,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 125 since Jul 2024–Jun 2025.
83	Aerospace Facilities Group, Inc. Top agencies USAF (Department of the Air Force)	$62,862	<0.1%	Rank history: not on the FY2021 list, #75 in FY2022, #72 in FY2023, #79 in FY2024 and #84 in FY2025; up 10 since Jul 2024–Jun 2025.
84	Home Maintenance Group LLC Top agencies VA (Department of Veterans Affairs)	$62,800	<0.1%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; up 87 since Jul 2024–Jun 2025.
85	National Elevator Inspection Services, Inc. Top agencies GSA (General Services Administration)	$62,721	<0.1%	Rank history: not on the FY2021–FY2023 lists, #83 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
86	Veterans Fire and Life Safety Corporation Top agencies VA (Department of Veterans Affairs)	$61,930	<0.1%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2023, #33 in FY2024 and #46 in FY2025; down 57 since Jul 2024–Jun 2025.
87	Valhalla Engineering Group LLC Top agencies VA (Department of Veterans Affairs)	$61,466	<0.1%	Rank history: not on the FY2021–FY2023 lists, #74 in FY2024 and not on the FY2025 list; up 15 since Jul 2024–Jun 2025.
88	Kulani Inc. Top agencies USAF (Department of the Air Force)	$60,866	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 22 since Jul 2024–Jun 2025.
89	Construcciones Vinpar S.A.S. Top agencies DOS (Department of State)	$55,420	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
90	Healing Hands Healing Hearts L.L.C. Top agencies VA (Department of Veterans Affairs)	$55,365	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
91	Reliant Elevator Inspections & Consulting, Inc. Top agencies DOT (Department of Transportation)	$54,316	<0.1%	Rank history: #64 in FY2021, not on the FY2022 list, #20 in FY2023, #85 in FY2024 and #54 in FY2025; down 39 since Jul 2024–Jun 2025.
92	Unks Construction, Inc. Top agencies USAF (Department of the Air Force)	$53,601	<0.1%	Rank history: #87 in FY2021, #84 in FY2022, not on the FY2023 list, #93 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
93	Golden Gate Federal LLC Top agencies DLA (Defense Logistics Agency)	$52,400	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
94	RMS GMBH Rasenpflege- UND Mäh-Service Top agencies Army (Department of the Army)	$52,290	<0.1%	Rank history: not on the FY2021 list, #97 in FY2022, #90 in FY2023, #92 in FY2024 and not on the FY2025 list; up 45 since Jul 2024–Jun 2025.
95	TÜV Rheinland Industrie Service GMBH Top agencies USAF (Department of the Air Force)	$50,158	<0.1%	Rank history: not on the FY2021–FY2025 lists; down 6 since Jul 2024–Jun 2025.
96	STC World Wide LLC Top agencies DOS (Department of State)	$49,893	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
97	CAI Safety Systems Inc Top agencies USAF (Department of the Air Force)	$49,172	<0.1%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; down 5 since Jul 2024–Jun 2025.
98	Tremco LLC Top agencies DOS (Department of State)	$48,720	<0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; down 14 since Jul 2024–Jun 2025.
99	Prime Projects International (Construction ) Limited Top agencies DOS (Department of State)	$47,000	<0.1%	Rank history: not on the FY2021–FY2023 lists, #46 in FY2024 and #44 in FY2025; down 71 since Jul 2024–Jun 2025.
100	Mass Tank Inspection Services LLC Top agencies Army (Department of the Army)	$46,177	<0.1%	Rank history: #95 in FY2021, not on the FY2022 list, #79 in FY2023, #99 in FY2024 and not on the FY2025 list; up 9 since Jul 2024–Jun 2025.

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100 of 226 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 54135

Code	Net obligations	Largest contractor
541350 Building Inspection Services	$79,241,769	T2S, LLC

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 $161 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.
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 54135 contractors in Jul 2025–Jun 2026?

1. T2S, LLC ($20.4M), 2. OST Inc. ($19.2M), 3. E.f. Kearney, Limited ($13.1M), 4. Analex Corporation ($8.53M), 5. Jll-Rer Solutions, LLC ($7.29M), 6. Tribal One Technology, LLC ($7.15M), 7. Institute for Building Technology and Safety ($4.68M), 8. Data Computer Corporation of America ($3.81M), 9. ABT Global LLC ($3.52M), 10. BAE Systems ($3.52M).

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