With the green building movement now in its second decade, Giants 300 firms have made sustainability comparable to breathing. They do it automatically.
New this year: charts showing the total number of green accredited staff—in addition to LEED APs and LEED Green Associates, the total includes Certified Energy Auditors and Managers, Certified Sustainable Building Advisors, Green Advantage Certified Professionals, Green Globes Assessors and Professionals, Green Roof Professionals, and High-Performance Building Design Professionals.
Note: An AEC professional who is, for example, both a LEED AP and a CEM would be counted in both categories.
Below, you’ll find rankings of green accredited professionals as a percentage of total employees in the firm. We did this to recognize smaller firms that have a high percentage of green-certified staff. +
TOP 10 GREEN BUILDING ARCHITECTURE FIRMS
| Rank | Company | 2011 Green Revenue ($) |
| 1 | Gensler | 392,000,000 |
| 2 | Skidmore, Owings & Merrill | 165,750,000 |
| 3 | HOK | 164,680,868 |
| 4 | HDR Architecture | 137,120,000 |
| 5 | Perkins+Will | 131,350,000 |
| 6 | HKS | 119,325,668 |
| 7 | NBBJ | 106,167,000 |
| 8 | ZGF Architects | 75,600,000 |
| 9 | HNTB Architecture | 62,139,956 |
| 10 | RTKL Associates | 60,000,000 |
TOP 10 GREEN BUILDING ENGINEERING FIRMS
| Rank | Company | 2011 Green Revenue ($) |
| 1 | Stantec | 189,400,000 |
| 2 | URS Corp. | 137,048,000 |
| 3 | AECOM Technology Corp. | 118,000,000 |
| 4 | Jacobs | 102,496,836 |
| 5 | Arup | 60,960,000 |
| 6 | KPFF Consulting Engineers | 50,000,000 |
| 7 | Burns & McDonnell | 43,747,479 |
| 8 | Syska Hennessy Group | 43,150,000 |
| 9 | WSP USA | 34,500,000 |
| 10 | Parsons Brinckerhoff | 34,400,000 |
TOP 10 GREEN BUILDING CONSTRUCTION FIRMS
| Rank | Company | 2011 Green Revenue ($) |
| 1 | Turner Corporation, The | 4,540,280,000 |
| 2 | URS Corp. | 3,875,000,000 |
| 3 | Clark Group | 2,324,000,000 |
| 4 | Balfour Beatty US | 2,137,850,000 |
| 5 | Gilbane Building Co. | 2,085,018,000 |
| 6 | Whiting-Turner Contracting Co., The | 1,911,396,378 |
| 7 | PCL Construction Enterprises | 1,730,300,000 |
| 8 | Hensel Phelps Construction | 1,476,940,000 |
| 9 | Holder Construction | 1,061,000,000 |
| 10 | Barton Malow Co. | 1,005,440,388 |
TOP 10 GREEN ACCREDITED STAFF AT ARCHITECTURE FIRMS
| Rank | Company | 2011 Green Accredited Staff |
| 1 | Gensler | 1211 |
| 2 | Perkins+Will | 986 |
| 3 | HOK | 854 |
| 4 | HDR Architecture | 802 |
| 5 | Cannon Design | 397 |
| 6 | SmithGroupJJR | 367 |
| 7 | HKS, Inc. | 342 |
| 8 | IBI Group | 313 |
| 9 | RTKL Associates | 242 |
| 10 | Skidmore, Owings & Merrill | 235 |
TOP 10 GREEN ACCREDITED STAFF AT ENGINEERING FIRMS
| Rank | Company | 2011 Green Accredited Staff |
| 1 | AECOM Technology Corp. | 914 |
| 2 | Stantec | 664 |
| 3 | Jacobs | 559 |
| 4 | URS Corp. | 501 |
| 5 | Burns & McDonnell | 272 |
| 6 | Arup | 233 |
| 7 | Parsons Brinckerhoff | 223 |
| 8 | WSP USA | 200 |
| 9 | Clark Nexsen | 191 |
| 10 | Dewberry | 178 |
TOP 10 GREEN ACCREDITED STAFF AT CONSTRUCTION FIRMS
| Rank | Company | 2011 Green Accredited Staff |
| 1 | Turner Corporation, The | 1251 |
| 2 | Jones Lang LaSalle | 1250 |
| 3 | Gilbane Building Co. | 481 |
| 4 | Balfour Beatty US | 446 |
| 5 | McCarthy Holdings | 407 |
| 6 | DPR Construction | 399 |
| 7 | JE Dunn Construction | 390 |
| 8 | Clark Group | 355 |
| 9 | PCL Construction Enterprises | 336 |
| 10 | Hensel Phelps Construction | 325 |
Related Stories
K-12 Schools | Feb 13, 2024
K-12 school design trends for 2024: health, wellness, net zero energy
K-12 school sector experts are seeing “healthiness” for schools expand beyond air quality or the ease of cleaning interior surfaces. In this post-Covid era, “healthy” and “wellness” are intersecting expectations that, for many school districts, encompass the physical and mental wellbeing of students and teachers, greater access to outdoor spaces for play and learning, and the school’s connection to its community as a hub and resource.
Office Buildings | Feb 13, 2024
Creating thoughtful tech workplace design
It’s important for office design to be inspiring, but there are some practical principles that can be incorporated into the design of real-world tech workplaces to ensure they convey an exciting, sophisticated allure that accommodates progressive thinking and inventiveness.
Airports | Feb 13, 2024
New airport terminal by KPF aims to slash curb-to-gate walking time for passengers
The new Terminal A at Zayed International Airport in the United Arab Emirates features an efficient X-shape design with an average curb-to-gate walking time of just 12 minutes. The airport terminal was designed by Kohn Pedersen Fox (KPF), with Arup and Naco as engineering leads.
Higher Education | Feb 9, 2024
Disability and architecture: ADA and universal design at college campuses
To help people with disabilities feel part of the campus community, higher education institutions and architects must strive to create settings that not only adhere to but also exceed ADA guidelines.
Codes | Feb 9, 2024
Illinois releases stretch energy code for building construction
Illinois is the latest jurisdiction to release a stretch energy code that provides standards for communities to mandate more efficient building construction. St. Louis, Mo., and a few states, including California, Colorado, and Massachusetts, currently have stretch codes in place.
Giants 400 | Feb 8, 2024
Top 10 Telecommunications Building Architecture Firms for 2023
Arcadis North America, CSArch, Interior Architects, and TETER top BD+C's ranking of the nation's largest telecommunications building architecture and architecture/engineering (AE) firms for 2023, as reported in Building Design+Construction's 2023 Giants 400 Report.
Giants 400 | Feb 8, 2024
Top 50 Public Library Architecture Firms for 2023
Quinn Evans, McMillan Pazdan Smith, PGAL, Skidmore, Owings & Merrill, and Gensler top BD+C's ranking of the nation's largest public library architecture and architecture/engineering (AE) firms for 2023, as reported in Building Design+Construction's 2023 Giants 400 Report.
Giants 400 | Feb 8, 2024
Top 60 Performing Arts Center and Concert Venue Architecture Firms for 2023
Populous, DLR Group, Gensler, HGA, and Perkins Eastman top BD+C's ranking of the nation's largest performing arts center and concert venue architecture and architecture/engineering (AE) firms for 2023, as reported in Building Design+Construction's 2023 Giants 400 Report.
Giants 400 | Feb 8, 2024
Top 70 Museum Architecture Firms for 2023
SmithGroup, Gensler, Ayers Saint Gross, Quinn Evans, HGA, and Cooper Robertson head BD+C's ranking of the nation's largest museum and gallery architecture and architecture/engineering (AE) firms for 2023, as reported in Building Design+Construction's 2023 Giants 400 Report.
Architects | Feb 8, 2024
LPA President Dan Heinfeld announced retirement
LPA Design Studios announced the upcoming retirement of longtime president Dan Heinfeld, who led the firm’s growth from a small, commercial development-focused architecture studio into a nation-leading integrated design practice setting new standards for performance and design excellence.
