June 4, 2012
The ENR California Top Design Firms list, ranks the largest U.S.-based designs firms, both publicly and privately held, based on design-specific revenue.

More detailed information on the Top Design Firms:
View complete list of main rankings
Related Article:
To Stay Heathy, Firms Add Services, Expand Overseas
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | ARCADIS U.S. | 110.03 |
| 2 | CH2M HILL | 68.39 |
| 3 | AECOM Technology Corp. | 19.29 |
| 4 | Ninyo & Moore | 6.00 |
| 5 | HDR | 4.37 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | CH2M HILL | 55.42 |
| 2 | Processes Unlimited International Inc. | 4.53 |
| 3 | Stantec | 1.99 |
| 4 | Arup | 1.13 |
| 5 | Simpson Gumpertz & Heger Inc. | 1.04 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | CH2M HILL | 142.76 |
| 2 | HDR | 90.20 |
| 3 | AECOM Technology Corp. | 66.36 |
| 4 | Stantec | 56.46 |
| 5 | Ninyo & Moore | 38.50 |
| 6 | Parsons Brinckerhoff | 33.33 |
| 7 | Michael Baker Corp. | 20.30 |
| 8 | Atkins | 18.82 |
| 9 | GEI Consultants Inc. | 8.80 |
| 10 | SWCA Environmental Consultants | 7.71 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corp. | 134.25 |
| 2 | HNTB Corp. | 120.58 |
| 3 | CH2M HILL | 107.05 |
| 4 | Parsons Brinckerhoff | 77.77 |
| 5 | Michael Baker Corp. | 60.00 |
| 6 | Carollo Engineers Inc. | 53.06 |
| 7 | Stantec | 46.72 |
| 8 | Hatch Mott MacDonald | 39.52 |
| 9 | BKF Engineers | 36.03 |
| 10 | Psomas | 35.73 |
| 11 | T.Y. Lin International | 21.62 |
| 12 | Arup | 17.76 |
| 13 | Atkins | 16.34 |
| 14 | David Evans and Associates Inc. | 12.44 |
| 15 | Penfield & Smith | 10.42 |
| 16 | LEE & RO Inc. | 4.50 |
| 17 | GEI Consultants Inc. | 4.40 |
| 18 | TTG (TMAD TAYLOR & GAINES) | 4.05 |
| 19 | aQuad Knopf Inc. | 3.60 |
| 20 | HMC Architects | 3.39 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | Stantec | 40.03 |
| 2 | Processes Unlimited International Inc. | 31.08 |
| 3 | TJ Cross Engineers Inc. | 29.88 |
| 4 | CH2M HILL | 10.35 |
| 5 | Ninyo & Moore | 1.50 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | Michael Baker Corp. | 14.00 |
| 2 | Penfield & Smith | 4.20 |
| 3 | Gensler | 2.37 |
| 4 | Psomas | 1.69 |
| 5 | Ninyo & Moore | 1.50 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corp. | 140.57 |
| 2 | Gensler | 63.87 |
| 3 | HMC Architects | 50.38 |
| 4 | Hellmuth, Obata & Kassabaum Inc. | 43.82 |
| 5 | Fentress Architects | 36.47 |
| 6 | KMD Architects | 34.69 |
| 7 | Cannon Design | 33.17 |
| 8 | SmithGroupJJR | 30.50 |
| 9 | DLR Group | 29.35 |
| 10 | LPA Inc. | 29.31 |
| 11 | Stantec | 29.17 |
| 12 | Perkins+Will | 28.51 |
| 13 | HDR | 26.46 |
| 14 | RBB Architects Inc. | 26.20 |
| 14 | ZGF Architects LLP | 26.20 |
| 16 | Lionakis | 25.63 |
| 17 | WLC Architects Inc. | 24.00 |
| 18 | Perkowitz+Ruth Architects | 20.85 |
| 19 | HNTB Corp. | 20.52 |
| 20 | MVE Group of Cos. | 20.44 |
| 21 | HGA Architects and Engineers | 20.13 |
| 22 | Langdon Wilson International | 19.25 |
| 23 | Lee, Burkhart, Liu Inc. | 17.20 |
| 24 | CO Architects | 16.72 |
| 25 | gkkworks | 11.57 |
| 26 | Carrier Johnson + CULTURE | 10.53 |
| 27 | TAYLOR | 10.50 |
| 28 | DES Architects + Engineers | 9.48 |
| 29 | RMW architecture & interiors | 9.25 |
| 30 | Ratcliff | 7.92 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corp. | 38.83 |
| 2 | TTG (TMAD Taylor & Gaines) | 29.74 |
| 3 | Arup | 26.32 |
| 4 | Syska Hennnessy Group | 22.47 |
| 5 | Glumac | 21.79 |
| 6 | Mazzetti Nash Lipsey Burch | 20.41 |
| 7 | CH2M HILL | 17.75 |
| 8 | exp Global Inc. | 17.25 |
| 9 | HDR | 12.83 |
| 10 | Stantec | 11.84 |
| 11 | HMC Architects | 11.71 |
| 12 | SmithGroupJJR | 11.50 |
| 13 | Parsons Brinckerhoff | 11.11 |
| 14 | Harley Ellis Devereaux | 3.29 |
| 15 | LPA Inc. | 2.93 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | Gensler | 44.94 |
| 2 | Rapt Studio | 10.86 |
| 3 | ZGF Architects LLP | 8.00 |
| 4 | RMW architecture & interiors | 6.78 |
| 5 | Langdon Wilson International | 6.42 |
| 6 | LPA Inc. | 5.78 |
| 7 | Stantec | 5.47 |
| 8 | Wolcott Architecture | Interiors | 5.29 |
| 9 | Ratcliff | 5.28 |
| 10 | HDR | 4.81 |
| 11 | Hellmuth, Obata & Kassabaum Inc. | 4.55 |
| 12 | Cannon Design | 4.52 |
| 13 | HMC Architects | 4.45 |
| 14 | DES Architects + Engineers | 3.79 |
| 15 | RBB Architects Inc. | 2.90 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | SmithGroupJJR | 48.00 |
| 2 | HMC Architects | 41.23 |
| 3 | HGA Architects and Engineers | 34.53 |
| 4 | RBB Architects Inc. | 28.53 |
| 5 | HDR | 26.72 |
| 6 | Cannon Design | 25.85 |
| 7 | AECOM Technology Corp. | 25.14 |
| 8 | Hellmuth, Obata & Kassabaum Inc. | 21.10 |
| 9 | Degenkolb Engineers | 20.90 |
| 10 | KMD Architects | 20.16 |
| 11 | Mazzetti Nash Lipsey Burch | 18.64 |
| 12 | Lionakis | 16.33 |
| 13 | TTG (TMAD TAYLOR & GAINES) | 15.06 |
| 14 | Stantec | 15.02 |
| 15 | TAYLOR | 12.21 |
| 16 | Langdon Wilson International | 12.07 |
| 17 | CO Architects | 11.35 |
| 18 | ZGF Architects LLP | 10.00 |
| 19 | Perkins+Will | 8.71 |
| 20 | Ratcliff | 8.58 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corp. | 229.06 |
| 2 | Parsons Brinckerhoff | 197.64 |
| 3 | HNTB Corp. | 134.11 |
| 4 | HDR | 68.11 |
| 5 | CH2M HILL | 48.11 |
| 6 | Hatch Mott MacDonald | 41.64 |
| 7 | T.Y. Lin International | 35.89 |
| 8 | Michael Baker Corp. | 25.20 |
| 9 | Fentress Architects | 24.66 |
| 10 | Stantec | 22.72 |
| 11 | Psomas | 18.73 |
| 12 | BKF Engineers | 15.42 |
| 13 | Atkins | 12.87 |
| 14 | Gensler | 10.64 |
| 15 | David Evans and Associates Inc. | 9.60 |
| 16 | Hellmuth, Obata & Kassabaum Inc. | 7.75 |
| 17 | Ninyo & Moore | 5.00 |
| 18 | MWA Architects | 4.28 |
| 19 | Thornton Tomasetti Inc. | 3.88 |
| 20 | TTG (TMAD TAYLOR & GAINES) | 3.64 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corp. | 160.74 |
| 2 | Gensler | 105.26 |
| 3 | HMC Architects | 84.91 |
| 4 | SmithGroupJJR | 62.00 |
| 5 | Arup | 50.10 |
| 6 | LPA Inc. | 48.19 |
| 7 | HDR | 48.11 |
| 8 | Stantec | 46.05 |
| 9 | Hellmuth, Obata & Kassabaum Inc. | 42.60 |
| 10 | HGA Architects and Engineers | 41.69 |
| 11 | TTG (TMAD Taylor & Gaines) | 41.41 |
| 12 | Cannon Design | 37.12 |
| 13 | KMD Architects | 35.14 |
| 14 | ZGF Architects LLP | 34.20 |
| 15 | Perkins+Will | 31.89 |
| 16 | Lionakis | 30.71 |
| 17 | DLR Group | 30.68 |
| 18 | RBB Architects Inc. | 29.10 |
| 19 | Degenkolb Engineers | 25.63 |
| 20 | Langdon Wilson International | 24.43 |
| 21 | WLC Architects Inc. | 24.00 |
| 22 | Michael Baker Corp. | 21.00 |
| 23 | Perkowitz+Ruth Architects | 20.85 |
| 24 | MVE Group of Cos. | 20.59 |
| 25 | Mazzetti Nash Lipsey Burch | 20.28 |
| 26 | BKF Engineers | 19.78 |
| 27 | gkkworks | 19.13 |
| 28 | Glumac | 19.02 |
| 29 | Psomas | 18.02 |
| 30 | exp Global Inc. | 17.68 |
| 31 | HNTB Corp. | 17.46 |
| 32 | CO Architects | 16.72 |
| 33 | RMW architecture & interiors | 16.03 |
| 34 | DES Architects + Engineers | 15.80 |
| 35 | Simpson Gumpertz & Heger Inc. | 15.79 |
| 36 | Syska Hennnessy Group | 13.99 |
| 37 | Ratcliff | 13.20 |
| 38 | TAYLOR | 12.21 |
| 39 | Nichols, Melburg & Rossetto Architects and Engineers | 12.00 |
| 40 | Parsons Brinckerhoff | 11.91 |
| 41 | Carrier Johnson + CULTURE | 11.28 |
| 42 | Harley Ellis Devereaux | 10.99 |
| 43 | Thornton Tomasetti Inc. | 10.84 |
| 44 | Fentress Architects | 10.35 |
| 45 | BAR Architects | 8.09 |
| 46 | RJC Architects Inc. | 7.78 |
| 47 | Ninyo & Moore | 7.00 |
| 48 | Crosby Group | 6.49 |
| 49 | CH2M HILL | 6.17 |
| 50 | Atkins | 5.84 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corp. | 23.12 |
| 2 | HDR | 13.71 |
| 3 | Hellmuth, Obata & Kassabaum Inc. | 11.61 |
| 4 | KMD Architects | 4.96 |
| 5 | DLR Group | 4.58 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | MVE Group of Cos. | 13.42 |
| 2 | BKF Engineers | 6.88 |
| 3 | Simpson Gumpertz & Heger Inc. | 3.51 |
| 4 | Carrier Johnson + CULTURE | 3.32 |
| 5 | BAR Architects | 2.31 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corp. | 65.67 |
| 2 | Gensler | 11.83 |
| 3 | RJC Architects Inc. | 7.78 |
| 4 | HDR | 7.20 |
| 4 | ZGF Architects LLP | 7.20 |
| 6 | Parsons Brinckerhoff | 6.58 |
| 7 | TTG (TMAD TAYLOR & GAINES) | 6.32 |
| 8 | CH2M HILL | 6.17 |
| 9 | KMD Architects | 6.13 |
| 10 | Perkins+Will | 6.09 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | Gensler | 26.02 |
| 2 | AECOM Technology Corp. | 20.93 |
| 3 | LPA Inc. | 10.92 |
| 4 | Arup | 10.51 |
| 5 | DES Architects + Engineers | 9.64 |
| 6 | Stantec | 8.91 |
| 7 | Glumac | 7.75 |
| 8 | DLR Group | 6.72 |
| 9 | Perkins+Will | 5.25 |
| 10 | Wolcott Architecture | Interiors | 5.23 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | HMC Architects | 39.85 |
| 2 | LPA Inc. | 30.10 |
| 3 | AECOM Technology Corp. | 19.44 |
| 4 | WLC Architects Inc. | 16.80 |
| 5 | Gensler | 15.38 |
| 6 | DLR Group | 11.88 |
| 7 | TTG (TMAD TAYLOR & GAINES) | 10.69 |
| 8 | Langdon Wilson International | 10.50 |
| 9 | Harley Ellis Devereaux | 8.17 |
| 10 | Lionakis | 7.81 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | Arup | 12.83 |
| 2 | WLC Architects Inc. | 2.40 |
| 3 | ZGF Architects LLP | 1.80 |
| 4 | CO Architects | 1.54 |
| 5 | Gensler | 1.18 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | RMW architecture & interiors | 10.02 |
| 2 | ZGF Architects LLP | 8.00 |
| 3 | SmithGroupJJR | 7.80 |
| 4 | Cannon Design | 4.97 |
| 5 | Perkins+Will | 4.66 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | CH2M HILL | nbsp;57.04 |
| 2 | HDR | 46.54 |
| 3 | AECOM Technology Corp. | 41.37 |
| 4 | GEI Consultants Inc. | 21.47 |
| 5 | Michael Baker Corp. | 19.30 |
| 6 | Carollo Engineers Inc. | 18.51 |
| 7 | Atkins | 11.19 |
| 8 | Psomas | 9.17 |
| 9 | Stantec | 6.85 |
| 10 | ARCADIS U.S. | 6.38 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | HDR | 28.93 |
| 2 | AECOM Technology Corp. | 14.95 |
| 3 | Stantec | 13.07 |
| 4 | Parsons Brinckerhoff | 7.31 |
| 5 | CH2M HILL | 7.30 |
| 6 | Michael Baker Corp. | 5.90 |
| 7 | Processes Unlimited International Inc. | 5.83 |
| 8 | Psomas | 4.84 |
| 9 | Ninyo & Moore | 4.00 |
| 10 | SWCA Environmental Consultants | 2.81 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | Carollo Engineers Inc. | 34.55 |
| 2 | HDR | 24.53 |
| 3 | Michael Baker Corp. | 16.40 |
| 4 | CH2M HILL | 14.78 |
| 5 | Stantec | 13.40 |
| 6 | ARCADIS U.S. | 10.08 |
| 7 | LEE & RO Inc. | 5.85 |
| 8 | Psomas | 5.84 |
| 9 | Ninyo & Moore | 5.00 |
| 10 | Atkins | 2.28 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | HNTB Corp. | 15.68 |
| 2 | Gensler | 5.91 |
| 3 | Cannon Design | 3.81 |
| 4 | Syska Hennnessy Group | 2.10 |
| 5 | Thornton Tomasetti Inc. | 1.44 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | Perkowitz+Ruth Architects | 15.85 |
| 2 | Stantec | 12.52 |
| 3 | Gensler | 10.64 |
| 4 | MulvannyG2 Architecture | 4.99 |
| 5 | Arup | 3.93 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | Arup | 39.57 |
| 2 | Syska Hennessy Group | 6.68 |
| 3 | Glumac | 2.77 |
| 4 | Stantec | 2.05 |
| 5 | Ninyo & Moore | 2.00 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | HDR | 78.81 |
| 2 | AECOM Technology Corp. | 74.61 |
| 3 | Parsons Brinckerhoff | 55.55 |
| 4 | Degenkolb Engineers | 27.86 |
| 5 | Thornton Tomasetti Inc. | 14.83 |
| 6 | Arup | 14.27 |
| 7 | T.Y. Lin International | 14.05 |
| 8 | TTG (TMAD Taylor & Gaines) | 11.16 |
| 9 | HNTB Corp. | 10.53 |
| 10 | Simpson Gumpertz & Heger Inc. | 8.43 |
| 11 | HMC Architects | 7.99 |
| 12 | Crosby Group | 7.12 |
| 13 | SmithGroupJJR | 5.50 |
| 14 | Lionakis | 3.43 |
| 15 | Michael Baker Corp. | 3.30 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | Psomas | 23.18 |
| 2 | AECOM Technology Corp. | 11.03 |
| 3 | Michael Baker Corp. | 7.70 |
| 4 | Parsons Brinckerhoff | 4.44 |
| 5 | Quad Knopf Inc. | 2.96 |
| Rank | Firm | ($Mil) |
|---|---|---|
| 1 | SmithGroupJJR | 43.92 |
| 2 | LPA Inc. | 43.37 |
| 3 | Fentress Architects | 34.84 |
| 4 | Arup | 34.23 |
| 5 | Cannon Design | 25.50 |
| 5 | Hatch Mott MacDonald | 25.50 |
| 7 | HDR | 25.10 |
| 8 | HNTB Corp. | 24.78 |
| 9 | AECOM Technology Corp. | 24.50 |
| 10 | Stantec | 23.39 |
| 11 | HMC Architects | 21.69 |
| 12 | Glumac | 20.00 |
| 13 | Hellmuth, Obata & Kassabaum Inc. | 19.58 |
| 14 | gkkworks | 19.12 |
| 15 | Perkins+Will | 13.21 |
| 16 | BKF Engineers | 13.00 |
| 17 | HGA Architects and Engineers | 12.88 |
| 18 | Syska Hennnessy Group | 12.52 |
| 19 | ZGF Architects LLP | 12.26 |
| 20 | Rapt Studio | 10.86 |
| 21 | RMW architecture & interiors | 10.43 |
| 22 | Carrier Johnson + CULTURE | 9.29 |
| 23 | DLR Group | 9.21 |
| 24 | Thornton Tomasetti Inc. | 7.21 |
| 25 | Langdon Wilson International | 7.00 |
| 26 | Lionakis | 6.96 |
| 27 | Harley Ellis Devereaux | 6.95 |
| 28 | MVE Group of Cos. | 6.16 |
| 29 | Perkowitz+Ruth Architects | 5.28 |
| 30 | Ratcliff | 4.60 |
| 31 | Michael Baker Corp. | 4.53 |
| 32 | CO Architects | 3.79 |
| 33 | EwingCole | 3.08 |
| 34 | TTG (TMAD TAYLOR & GAINES) | 2.48 |
| 35 | RBB Architects Inc | 2.36 |
| 36 | Crosby Group | 2.28 |
| 37 | Roesling Nakamura Terada Architects Inc. (RNT) | 2.26 |
| 38 | RNL | 2.00 |
| 39 | DES Architects + Engineers | 1.60 |
| 40 | Sugimura Finney Architects | 1.50 |
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