114,291 LEED APs: Turner Tops Perkins+Will

August 11, 2010

Project: Colburn School of the Performing Arts Conservatory of Music, Los AngelesArchitect: Pfeiffer Partners ArchitectsStructural engineer: John A. Martin & Associates (E 11) MEP engineer: Syska Hennessy Group (E 1)Contractor: Matt ConstructionPhoto: Eric Staudenmaier


During the past year, 60,950 design and construction professionals in the U.S. earned their green stripes by becoming accredited through the Green Building Certification Institute's LEED Accredited Professionals program. As of late June, 114,291 AEC professionals have been accredited through the GBCI, up from 53,341 last year, according to the Washington, D.C.-based organization.




Since 2004, BD+C has tracked the number of LEED APs within the nation's largest AEC firms as part of its annual Giants 300 survey. Of the 320 firms surveyed this year, 99% report having at least one LEED AP on staff, and 88% say they have 10 or more LEED APs.

For the first time, Turner takes the top spot on BD+C's Top 50 Building Team LEED APs ranking, with 1,006. Turner added more than 580 LEED APs during the past year to surpass Perkins+Will, which held the top spot four years running.

LPA has the highest percentage of LEED APs on staff among the Giants 300, with 76.4% of the firm's total staff accredited. Mithun (70.1%), Perkins+Will (61.7%), Dunham Associates (60.2%), and FXFOWLE Architects (55%) round out the top five by percentage.

Expanded Top Building Team LEED AP rankings are available at www.BDCnetwork.com/Giants.

Firm LEED APs # Staff % LEED APs
Source: 2009 Giants 300 survey. For the full LEED AP rankings, visit: www.BDCnetwork.com/Giants
1. Turner 1,006 5,823 17.3
2. Perkins+Will 1,000 1,622 61.7
3. HOK 914 2,212 41.3
4. Gensler 820
5. HDR Architecture 492 1,727 28.5
6. Skanska USA Building 435 8,100 5.4
7. AECOM Technology Corp. 413 43,000 1.0
8. Stantec 405 8,244 4.9
9. Gilbane Building Co. 404 2,200 18.4
10. JE Dunn Construction Group 376 2,807 13.4
11. McCarthy Holdings 350 3,000 11.7
12. DPR Construction 325 1,826 17.8
13. Swinerton Inc. 306 1,102 27.8
14. Bovis Lend Lease 300 2,746 10.9
15. HKS 290 1,073 27.0
15. SmithGroup 290 812 35.7
17. Jacobs 271 54,957 0.5
18. Hensel Phelps Construction 267 2,964 9.0
19. Clark Group 264 4,250 6.2
20. Cannon Design 261 851 30.7
21. Balfour Beatty Construction 246 1,628 15.1
22. URS Corp. 240 51,095 0.5
23. Mortenson Construction 233 1,314 17.7
24. Brasfield & Gorrie 226 2,870 7.9
25. Weitz Co., The 211 2,253 9.4
26. RTKL Associates 209 942 22.2
27. Structure Tone 200 1,150 17.4
28. Heery International 194 1,460 13.3
29. Rudolph and Sletten 192 512 37.5
30. Leo A Daly 177 1,063 16.7
31. Arup 176 10,032 1.8
32. PCL Construction Enterprises 175 9,493 1.8
33. CH2M HILL 172 24,971 0.7
34. LPA 168 220 76.4
35. Whiting-Turner Contracting Co. 166 2,062 8.1
36. Sundt Construction 158 1,600 9.9
37. Burns & McDonnell 152 2,900 5.2
37. DLR Group 152 503 30.2
39. Skidmore, Owings & Merrill 144 1,042 13.8
40. Burt Hill 143 911 15.7
40. Pepper Construction Group 143 598 23.9
42. Clark Nexsen 139 476 29.2
42. Zimmer Gunsul Frasca Architects 139 473 29.4
44. Thornton Tomasetti 136 531 25.6
45. SHW Group 135 396 34.1
46. Beck Group 134 580 23.1
47. NBBJ 133 780 17.1
47. Reynolds, Smith and Hills 133 806 16.5
49. Holder Construction Co. 132 420 31.4
49. STV Group 132 1,654 8.0