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
Architects | Dec 13, 2021
MASS Design Group receives 2022 AIA Architecture Firm Award
The annual AIA Architecture Firm Award is the highest honor the AIA bestows on an architecture practice.
Architects | Dec 13, 2021
2022 AIA Gold Medal awarded to Angela Brooks and Lawrence Scarpa
The Gold Medal honors an individual or pair whose significant body of work has had a lasting influence on the theory and practice of architecture.
K-12 Schools | Dec 10, 2021
Trends in K-12 school design, with Dan Boggio and Melissa Turnbaugh of PBK
Dan Boggio and Melissa Turnbaugh of PBK, the largest K-12 design firm in the U.S., discuss the favorable market conditions and the latest trends in K-12 school design with BD+C's Rob Cassidy.
Architects | Dec 9, 2021
Hoffmann Architects wins Connecticut American Institute of Architects Justice, Equity, Diversity & Inclusion Award
The AIA Connecticut J.E.D.I. Challenge, launched in November 2020, offers member firms the opportunity to commit to actions in each of the Challenge areas.
Giants 400 | Dec 5, 2021
2021 Justice Facility Sector Giants: Top architecture, engineering, and construction firms in the U.S. justice facility/public safety sector
Turner Construction, DLR Group, AECOM, and Stantec top BD+C's rankings of the nation's largest architecture, engineering, and construction firms for justice facility/public safety buildings work, including correctional facilities, fire stations, jails, police stations, and prisons, as reported in the 2021 Giants 400 Report.
Giants 400 | Dec 3, 2021
2021 Hotel Sector Giants: Top architecture, engineering, and construction firms in the U.S. hospitality sector
Gensler, Jacobs, Suffolk Construction, and WATG top BD+C's rankings of the nation's largest hotel sector architecture, engineering, and construction firms, as reported in the 2021 Giants 400 Report.
Architects | Nov 29, 2021
LRK Names Tony Pellicciotti ‘Managing Principal’ of firm
Pellicciotti is one of LRK’s fourteen principals representing its markets in Memphis, Dallas, Philadelphia, Orlando/Celebration, New Orleans, Baton Rouge, Little Rock, and Princeton.
Architects | Nov 23, 2021
HMC names new Director of Design
James Krueger will oversee design and lead strategies to improve the impact of HMC’s work.
Giants 400 | Nov 20, 2021
2021 Parking Structure Giants: Top architecture, engineering, and construction firms in the U.S. parking structure sector
PGAL, PCL Construction, and Wiss, Janney, Elstner Associates top BD+C's rankings of the nation's largest parking structure sector architecture, engineering, and construction firms, as reported in the 2021 Giants 400 Report.
Giants 400 | Nov 20, 2021
Top 100 Design-Build Construction Firms for 2021
Clayco, Hensel Phelps, ARCO Construction Companies, Swinerton, and Ryan Companies US top the rankings of the nation's largest design-build construction firms for buildings construction work, according to BD+C's 2021 Giants 400 Report.