Top 10 AEC Firms in Green Buildings and LEED Staff

With the green building movement now in its second decade, green practices have become integral in leading AEC firms. Giants 300 firms such as Gensler, Stantec, and Turner have set the standards for sustainability to the same priority as breathing – they do it automatically. The following charts list the Top 10 Green Building AEC Firms by Revenue and by Accredited Staff.*

Architecture

Top 10 Green Building 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 Accredited Staff

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

Engineering

Top 10 Green Building 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 Accredited Staff

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

Construction

Top 10 Green Building 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

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

*Professions listed as Accredited Staff include LEED APs, LEED Green Associates, Certified Energy Auditors and Managers, Certified Sustainable Building Advisers, Green Advantage Certified Professions, Green Roof Professionals, and High-Performance Building Design Professionals.