Top NAICS Codes for Department of Transportation FY2025

Industries ranked by federal contract obligations awarded by Department of Transportation during fiscal year 2025.

Quick answer

NAICS 334210, TELEPHONE APPARATUS MANUFACTURING, leads Department of Transportation in FY2025 with $110,576,188 in ingested obligations.

Market Snapshot

Ranked contractors33

Top obligations$110,576,188

Rank	NAICS	NAICS industry	Obligations	Awards
1	334210	TELEPHONE APPARATUS MANUFACTURING	$110,576,188	1
2	236220	COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION	$74,359,632	5
3	483111	DEEP SEA FREIGHT TRANSPORTATION	$36,395,485	16
4	237310	HIGHWAY, STREET, AND BRIDGE CONSTRUCTION	$33,929,043	4
5	541611	ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES	$23,240,613	5
6	541330	ENGINEERING SERVICES	$19,930,162	12
7	541990	ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES	$10,858,242	3
8	541690	OTHER SCIENTIFIC AND TECHNICAL CONSULTING SERVICES	$9,881,367	3
9	541715	RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY)	$6,368,977	2
10	561720	JANITORIAL SERVICES	$3,814,755	10
11	238220	PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS	$3,073,409	3
12	336611	SHIP BUILDING AND REPAIRING	$2,830,000	1
13	561410	DOCUMENT PREPARATION SERVICES	$1,930,657	1
14	541712	RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT BIOTECHNOLOGY)	$1,763,000	1
15	336413	OTHER AIRCRAFT PARTS AND AUXILIARY EQUIPMENT MANUFACTURING	$1,174,513	1
16	541511	CUSTOM COMPUTER PROGRAMMING SERVICES	$859,879	1
17	541512	COMPUTER SYSTEMS DESIGN SERVICES	$812,300	1
18	541620	ENVIRONMENTAL CONSULTING SERVICES	$404,997	1
19	541199	ALL OTHER LEGAL SERVICES	$335,411	1
20	561210	FACILITIES SUPPORT SERVICES	$292,038	2
21	423410	PHOTOGRAPHIC EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS	$242,326	1
22	811219	OTHER ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE	$180,442	1
23	541519	OTHER COMPUTER RELATED SERVICES	$170,575	2
24	541211	OFFICES OF CERTIFIED PUBLIC ACCOUNTANTS	$109,880	1
25	339940	OFFICE SUPPLIES (EXCEPT PAPER) MANUFACTURING	$95,205	1
26	562910	REMEDIATION SERVICES	$93,122	1
27	611512	FLIGHT TRAINING	$83,250	1
28	423430	COMPUTER AND COMPUTER PERIPHERAL EQUIPMENT AND SOFTWARE MERCHANT WHOLESALERS	$52,500	1
29	541310	ARCHITECTURAL SERVICES	$45,000	1
30	561710	EXTERMINATING AND PEST CONTROL SERVICES	$32,595	1
31	238290	OTHER BUILDING EQUIPMENT CONTRACTORS	$25,854	2
32	811310	COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT (EXCEPT AUTOMOTIVE AND ELECTRONIC) REPAIR AND MAINTENANCE	$21,245	1
33	221310	WATER SUPPLY AND IRRIGATION SYSTEMS	$17,352	1

Source: USAspending.gov. Last updated from ingested federal spending data: May 7, 2026.