May 2015

The Top Design Firms list, published annually, ranks the largest U.S.-based designs firms, both publicly and privately held, based on design-specific revenue.

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More detailed information on the Top List
Top Design Firms Main Rankings

Related Article:
Regional Design Firms Make Steady Market Gains

Click below for earlier editions:
2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008

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Government/Public Services

Rank	Firm	($ Mil)
1	AECOM	75.07
2	RS&H Inc.	20.00
3	Pond & Co.	15.50
4	Cardno	12.38
5	Atkins North America	10.75
6	LS3P	6.95
7	Robert and Company	5.34
8	Clark Nexsen	5.17
9	CEMS Engineering/Architecture	5.00
10	Little	3.71
11	Burns & McDonnell	3.65
12	Dewberry	3.39
13	Universal Engineering Sciences Inc.	2.73
14	KCI Technologies Inc.	2.20
15	Jones Edmunds	2.18
16	Perkins+Will	2.11
17	Stevens & Wilkinson	2.10
18	TLC Engineering for Architecture Inc.	1.98
19	Terracon Consultants Inc.	1.95
20	Harvard Jolly Architecture	1.07

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Green Design

Rank	Firm	($ Mil)
1	Rule Joy Trammell + Rubio LLC	15.00
2	TLC Engineering for Architecture Inc.	11.69
3	Fentress Architects	11.61
4	Perkins+Will	11.17
5	Little	9.46
6	Cooper Carry Inc.	8.43
7	BRPH	7.16
8	Gensler	6.80
9	LS3P	6.19
10	Clark Nexsen	6.00

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Commercial

Rank	Firm	($ Mil)
1	Gensler	20.83
2	AECOM	16.13
3	LS3P	15.01
4	Little	14.30
5	RS&H Inc.	10.60
6	Perkins+Will	8.43
7	Universal Engineering Sciences Inc.	8.35
8	Rule Joy Trammell + Rubio, LLC	5.73
9	Cooper Carry Inc.	5.29
10	Terracon Consultants Inc.	4.78
11	Stevens & Wilkinson	4.54
12	England-Thims & Miller Inc.	2.80
13	TLC Engineering for Architecture Inc.	2.68
14	Syska Hennessy Group	2.10
15	BRPH	2.06
16	Pond & Company	2.00
17	Smallwood, Reynolds, Stewart, Stewart & Associates Inc.	1.91
18	Withers & Ravenel Inc.	1.63
19	McMillan Pazdan Smith Architecture	1.63
20	Stewart	1.61

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Architecture

Rank	Firm	($ Mil)
1	LS3P	49.58
2	Perkins+Will	46.17
3	Little	25.99
4	HKS Inc.	25.90
5	McMillan Pazdan Smith Architecture	22.74
6	BRPH	19.35
7	RS&H Inc.	18.40
8	Cooper Carry Inc.	18.12
9	Gensler	16.08
10	Schenkel & Shultz Inc.	15.57
11	Rule Joy Trammell + Rubio LLC	15.28
12	Clark Nexsen	15.03
13	AECOM	14.58
14	Harvard Jolly Architecture	12.47
15	Fentress Architects	11.66
16	Zyscovich Architects	11.10
17	Stevens & Wilkinson	10.88
18	VOA Associates Incorporated	10.61
19	Lord Aeck Sargent	10.10
20	Wakefield Beasley & Associates	9.47

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Civil Engineering

Rank	Firm	($ Mil)
1	AECOM	323.50
2	Kimley-Horn	130.15
3	HNTB Corp.	119.55
4	Atkins North America	102.23
5	RS&H Inc.	88.50
6	Stantec	59.76
7	Cardno	49.52
8	ARCADIS US/RTKL/Callison	41.29
9	Kisinger Campo & Associates Corp.	30.70
10	Michael Baker international	29.22
11	England-Thims & Miller Inc.	25.50
12	Dewberry	24.12
13	Jones Edmunds	23.10
14	Gannett Fleming	21.93
15	Wantman Group Inc.	21.50
16	WSP | Parsons Brinckerhoff	20.70
17	Hatch Mott MacDonald	18.68
18	CPH Inc.	18.23
19	STV	18.21
20	GAI Consultants Inc.	18.05

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Environmental and Geotechnical

Rank	Firm	($ Mil)
1	ARCADIS US/RTKL/Callison	106.80
2	Cardno	49.52
3	Terracon Consultants Inc.	48.73
4	AECOM	45.93
5	Universal Engineering Sciences Inc.	18.44
6	Stantec	15.68
7	WSP | Parsons Brinckerhoff	10.79
8	Woolpert Inc.	10.33
9	Langan Engineering and Environmental Services Inc.	8.25
10	KCI Technologies Inc.	8.20