Who supplies professional services

6,930 companies hold professional services contracts with American local government. The ten largest hold 6% of them.

Ranked by governments won

Governments	Company	Contracts	Stated value
89	Kimley-Horn and Associates, Inc	175	$85.8M
68	HDR Engineering, Inc	161	$590.0M
51	Stantec Consulting Services, Inc	102	$224.4M
37	Freese and Nichols, Inc	82	$48.6M
30	AECOM Technical Services, Inc	77	$108.6M
30	Jacobs Engineering Group, Inc	74	$309.4M
26	Halff Associates, Inc	70	$24.8M
26	CDM Smith, Inc	61	$48.2M
24	Terracon Consultants, Inc	47	$9.04M
24	Garver, LLC	44	$41.8M
24	Raftelis Financial Consultants, Inc	27	$2.82M
23	Michael Baker International, Inc	48	$36.8M
23	WSP USA Inc	28	$25.2M
22	CliftonLarsonAllen LLP	37	$14.2M
21	Tetra Tech, Inc	48	$105.3M
20	Carollo Engineers, Inc	40	$50.2M
18	Geosyntec Consultants, Inc	36	$23.0M
18	Forvis Mazars, LLP	26	$6.11M
17	LJA Engineering, Inc	41	$37.1M
17	HR Green, Inc	37	$19.8M
17	Design, Inc	22	$21.7M
17	CSG Consultants, Inc	22	$10.2M
16	Ardurra Group, Inc	31	$79.0M
16	Black & Veatch Corporation	26	$46.3M
15	Atlas Technical Consultants, LLC	31	$30.8M
15	Westwood Professional Services, Inc	24	$12.4M
15	Willdan Engineering	23	$3.30M
14	Burns & McDonnell Engineering Company, Inc	35	$121.2M
14	Hazen and Sawyer	23	$128.0M
14	Kimley-Horn & Associates, Inc	21	$11.9M
14	PFM Financial Advisors LLC	17	$106K
13	Freese & Nichols, Inc	25	$10.4M
13	Rincon Consultants, Inc	23	$5.59M
13	BKF Engineers	20	$2.93M
13	HDR, Inc	17	$10.9M
13	Mead & Hunt, Inc	16	$3.62M
12	Baker Tilly US, LLP	17	$4.23M
12	KCI Technologies, Inc	17	$12.7M
12	WSB LLC	15	$1.83M
12	Berry, Dunn, McNeil & Parker, LLC	15	$979K
12	Bolton & Menk	15	$832K
11	Alfred Benesch & Company	30	$26.1M
11	HNTB Corporation	28	$120.8M
11	CONSOR North America	21	$33.5M
11	Gartner, Inc	19	$17.3M
11	Carahsoft Technology Corporation	15	$5.60M
11	Arcadis U.S., Inc	15	$59.2M
11	MGT Impact Solutions, LLC	13	$693K
11	Fehr & Peers	12	$8.54M
10	Civiltech Engineering, Inc	25	$7.37M
10	Huitt-Zollars, Inc	21	$7.20M
10	MNS Engineers, Inc	20	$9.19M
10	Dewberry Engineers, Inc	19	$10.0M
10	GHD, Inc	19	$12.9M
10	Teague Nall and Perkins, Inc	17	$4.18M
10	Stanley Consultants, Inc	15	$3.72M
10	HF&H Consultants, LLC	14	$1.47M
10	Baker Tilly Advisory Group, LP	14	$1.58M
10	Lochner, Inc	12	$11.6M
10	EMS Management & Consultants, Inc	11	$543K

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.