Who supplies professional services

5,598 companies hold professional services contracts with American local government. The ten largest hold 7% of them.

Ranked by governments won

Governments	Company	Contracts	Stated value
58	Kimley-Horn and Associates, Inc	145	$83.4M
42	HDR Engineering, Inc	115	$599.5M
41	Stantec Consulting Services, Inc	89	$252.4M
26	AECOM Technical Services, Inc	85	$133.3M
23	Jacobs Engineering Group, Inc	89	$328.4M
22	CDM Smith, Inc	54	$36.6M
21	Michael Baker International, Inc	50	$38.6M
20	Freese and Nichols, Inc	58	$42.8M
20	Carollo Engineers, Inc	51	$53.0M
20	WSP USA Inc	27	$28.0M
19	Terracon Consultants, Inc	38	$8.95M
19	Raftelis Financial Consultants, Inc	22	$2.79M
18	CliftonLarsonAllen LLP	34	$13.5M
17	Tetra Tech, Inc	43	$104.5M
16	Design, Inc	22	$20.2M
14	Black & Veatch Corporation	24	$45.6M
13	Halff Associates, Inc	52	$19.1M
13	Garver, LLC	32	$31.6M
13	CSG Consultants, Inc	18	$9.99M
12	LJA Engineering, Inc	36	$32.3M
12	Ardurra Group, Inc	26	$77.2M
12	Rincon Consultants, Inc	23	$6.01M
12	Fehr & Peers	13	$8.32M
11	Gartner, Inc	19	$17.3M
11	HDR, Inc	17	$14.6M
10	Burns & McDonnell Engineering Company, Inc	32	$120.1M
10	HNTB Corporation	27	$120.5M
10	Geosyntec Consultants, Inc	26	$18.2M
10	Hazen and Sawyer	23	$128.7M
10	BKF Engineers	17	$2.71M
10	Baker Tilly US, LLP	14	$4.11M
10	Arcadis U.S., Inc	14	$51.1M
10	Kimley-Horn & Associates, Inc	14	$9.76M
10	Carahsoft Technology Corporation	13	$5.44M
10	Environmental Science Associates	13	$4.43M
9	CONSOR North America	17	$29.1M
9	GHD, Inc	17	$11.9M
9	Westwood Professional Services, Inc	17	$11.0M
9	Willdan Engineering	16	$1.21M
9	HF&H Consultants, LLC	15	$1.16M
9	Mead & Hunt, Inc	14	$3.66M
9	Forvis Mazars, LLP	13	$5.68M
9	Lochner, Inc	12	$11.6M
8	Alfred Benesch & Company	25	$24.8M
8	Toole Design Group, LLC	14	$8.35M
8	Hagerty Consulting, Inc	14	$8.08M
8	KCI Technologies, Inc	14	$13.5M
8	Brown and Caldwell	13	$13.4M
8	CBRE, Inc	13	$2.67M
8	WSB, LLC	11	$1.53M
8	Kleinfelder, Inc	11	$28.0M
8	PFM Financial Advisors LLC	11	$86K
8	DKS Associates	11	$2.01M
8	Townsend Public Affairs, Inc	10	$623K
8	Crowe LLP	8	$3.09M
7	HR Green, Inc	23	$16.2M
7	Cobb, Fendley & Associates, Inc	22	$14.0M
7	GEI Consultants, Inc	20	$7.92M
7	Atlas Technical Consultants, LLC	19	$43.2M
7	MNS Engineers, Inc	19	$18.4M

How this is counted. One row is one company across every government that names it, and supplier names are typed by hand into agendas, so spellings are merged where only a plural or a written-out “incorporated” differs — never on resemblance. Every figure is therefore a floor. Category is read from the wording of each record, so a contract covering several things sits in whichever one its title leads with. Stated value sums the amounts written on the records and is not a company's revenue.