Building owners and developers who wish to apply sustainable design and construction practices for their next project will have no shortage of green experts to call.

Some 25,000 AEC professionals are now accredited through the U.S. Green Building Council’s LEED Accredited Professional program, up from 20,100 this time last year, according to USGBC.

Each year, Building Design & Construction tracks the number of LAPs within the nation’s largest design and construction firms as part of its annual Giants survey. Of the 429 firms surveyed this year, 80% report having at least one LAP on staff, and 33% say they have 10 or more LAPs.

Chicago-based Perkins+Will retains the top spot on BD&C’s top 100 Building Team LAPs ranking, with 450 LAPs on staff. Thirty-one P+W designers earned their green stripes within the past year.

Edmonton-based Stantec experienced the largest gain in LAPs within the past year following its October 2005 acquisition of Vancouver-based green design specialist Keen Engineering. The moved added more than 100 LEED Accredited Professionals to its staff, helping Stantec crack the top five on our list.

Other big gainers: The Turner Corp., Dallas (115 LAPs, up from 76 in last year’s ranking), Shepley Bulfinch Richardson and Abbott, Boston (58 LAPs, up from 36), Kling, Philadelphia (51 LAPs, up from 30), and Henderson Engineers, Lenexa, Kan. (46 LAPs, up from 5).

BD&C's Top 100 Building Team LAPs
  Firm LAPs Total staff % LAPs (of total staff)
1. Perkins+Will 450 1,048 42.9
2. Gensler 433 1,914 22.6
3. HOK 308 1,997 15.4
4. Stantec 240 5,623 4.3
5. DPR Construction 122 811 15.0
6. Fluor Corp. 120



7. The Turner Corp. 115 5,561 2.1
7. HDR 115 834 13.8
9. Cannon Design 103 644 16.0
10. SmithGroup 87 785 11.1
11. Mithun 86 195 44.1
12. RTKL Associates 80 936 8.5
12. DMJM H&N 80 1,297 6.2
14. Moseley Architects 79 212 37.3
15. HKS 73 825 8.8
16. CH2M Hill 71
 15,000

 0.5
17. NBBJ 62
 649

 9.6
18. Leo A Daly 60 909 6.6
19. Shepley Bulfinch Richardson and Abbott 58 220 26.4
20. Holder Construction 56 341 16.4
20. Flack + Kurtz 56 315 17.8
22. Bovis Lend Lease 53 2,499 2.1
23. Hammel, Green and Abrahamson 52 475 10.9
24. Kling 51 400 12.8
25. Gilbane Building Co. 49 1,800 2.7
26. Zimmer Gunsul Frasca Partnership 47 390 12.1
26. OWP/P 47 287 16.4
26. Callison 47 574 8.2
29. Hensel Phelps Construction 46 2,239 2.1
29. Henderson Engineers 46 318 14.5
31. Syska Hennessy Group 44 556 7.9
31. Parsons Brinckerhoff 44 9,600 0.5
31. Clark Group 44 3,400 1.3
34. JE Dunn Construction Group 43 2,656 1.6
34. Affiliated Engineers 43 472 9.1
36. Glumac 42 162 25.9
37. The Beck Group 41 568 7.2
37. Skanska USA Building 41 9,221 0.4
39. Swinerton Inc. 40 1,268 3.2
39. Ellerbe Becket 40 336 11.9
39. Adolfson & Peterson Construction 40 538 7.4
42. M.A. Mortenson 39 915 4.3
42. 3D/International 39 515 7.6
44. Burt Hill 38 598 6.4
45. HMC Architects 37 408 9.1
45. Hayes, Seay, Mattern & Mattern 37 600 6.2
45. Harley Ellis Devereaux 37 462 8.0
48. URS Corp. 36 26,431 0.1
48. DLR Group 36 479 7.5
50. KPFF Consulting Engineers 35 720 4.9
50. Jacobs Engineering Group 35 27,200 0.1
50. EwingCole 35 304 11.5
50. CUH2A 35 353 9.9
54. Little 34 271 12.5
55. LPA 33 233 14.2
55. Carter & Burgess 33 2,737 1.2
57. Thompson, Ventulett, Stainback & Associates 32 292 11.0
57. RNL Design 32 172 18.6
59. The Whiting-Turner Contracting Co. 31 1,691 1.8
59. R.G. Vanderweil Engineers 31 310 10.0
61. Tishman Construction 30 810 3.7
61. Sundt Construction 30 600 5.0
61. Kitchell Contractors 30 722 4.2
61. Gould Evans Associates 30 221 13.6
61. Anshen+Allen 30 336 8.9
66. Ballinger 28 210 13.3
67. TLC Engineering for Architecture 27 258 10.5
67. The Durrant Group 27 322 8.4
67. Sasaki Associates 27 271 10.0
67. Hoffman Construction 27 386 7.0
71. The Benham Cos. 26 680 3.8
71. Interface Engineering 26 124 21.0
71. Clark Nexsen 26 300 8.7
71. Burns & McDonnell 26 2,050 1.3
75. Einhorn Yaffee Prescott, Architecture & Engineering 25 300 8.3
76. Smith Seckman Reid 24 430 5.6
76. Mazzetti & Associates 24 94 25.5
76. Cooper Carry 24 253 9.5
79. Cuningham Group Architecture 22 174 12.6
79. Chong Partners Architecture 22 190 11.6
81. Tsoi/Kobus & Associates 21 97 21.6
81. Sparling 21 145 14.5
81. Boulder Associates 21 60 35.0
84. PageSoutherlandPage 20 307 6.5
84. HNTB Architecture 20 363 5.5
84. Heapy Engineering 20 130 15.4
84. A. Epstein and Sons International 20 196 10.2
88. The S/L/A/M Collaborative 19 164 11.6
88. RBB Architects 19 98 19.4
88. Perkins Eastman 19 605 3.1
88. Kohn Pedersen Fox Associates 19 440 4.3
88. Heery International 19 878 2.2
88. Gresham, Smith and Partners 19 658 2.9
88. Elkus Manfredi Architects 19 192 9.9
88. Barton Malow 19 1,350 1.4
96. Kirksey 18 111 16.2
96. Hillier Architecture 18 311 5.8
96. Beyer Blinder Belle Architects & Planners 18 162 11.1
96. OZ Architecture 18 169 10.7
96. ADD 18 152 11.8
Source: BD&C's 30th Annual Giants 300 survey
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Abstract: 
Building owners and developers who wish to apply sustainable design and construction practices for their next project will have no shortage of green experts to call. Some 25,000 AEC professionals are now accredited through the U.S. Green Building Council’s LEED Accredited Professional program, up from 20,100 this time last year, according to USGBC.
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25,000 LEED Professionals and Counting
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