A.L.L. Masonry Construction Company, Inc.
Abengoa, S.A.
AC Martin Partners, Inc.
ACCO Engineered Systems
Acousti Engineering Company of Florida
Acoustics Incorporated
ADCO Electrical Corporation
Aiken Group Limited
AJT & Associates, Inc.
Akima Management Services, Inc.
Alchemy Design + Architecture
Aldridge Electric, Inc.
Alion Science and Technology Corporation
All Star Inc.
Allan Briteway Electrical Contractors, Inc.
Alman Construction Services, L.P.
Altoon + Porter Architects LLP
AMEC Americas Limited
AMEC NNC
AMEC plc
American Pan & Engineering Co., Inc.
American Terrazzo Company, Ltd.
Anshen+Allen Architects, Inc.
Anthony & Sylvan Pools Corporation
ARCADIS N.V. [ARCAY.PK]
ARCADIS US Inc.
Architects Delawie Wilkes Rodrigues Barker
Architectural Group International, P.S.C.
Arup Group Limited
Athena Engineering, Inc.
Atlantic Plant Maintenance
Atlas Comfort Systems USA, L.P.
Atlas Industrial Holdings L.L.C.
Atlas Mining Company [ALMI.OB]
Atwell-Hicks
Aukett Fitzroy Robinson
Ausenco Limited
Austin Veum Robbins Partners, Inc.
Avánzit, S.A.

Babcock Eagleton, Inc.
Baker Triangle
Balfour Beatty Rail Limited
Baran Group Ltd. [BRANF.PK]
Barnes Gromatzky Kosarek Architects, Inc.
Barri Electric Company, Inc.
Basic Industries Inc.
Batenburg Beheer N.V.
Bayview Electric Company, L.L.C.
BE&K, Inc.
Becon Construction Company, Inc
Belcan Corporation
BELFOR USA Group, Inc.
Bergelectric Corporation
Bermello, Ajamil & Partners, Inc.
Bertrandt AG
Bethell Group plc
BetterBuilt and Associates Roofing, Inc.
Black & Veatch Holding Company
Bonitz, Inc.
Boustead Singapore Limited
Bowman Consulting Group, Ltd.
Branch & Associates, Inc.
Bridgen Holdings Limited
Briggs & Forrester Group Ltd
BUCON, Inc.
Burkett & Wong Engineers, Inc.
Burns & McDonnell, Inc.
Burns and Roe Group, Inc.
Bury+Partners, Inc.
Byrne Bros. (Formwork) Limited

Cabral Roofing & Waterproofing Corp.
Cache Valley Electric Co.
Calder Peel Partnership Ltd.
California's Gunite & Pool Plastering, Inc.
Callison Architecture, Inc.
Camp Dresser & McKee Inc.
Cannon Design
Cape PLC
Carpenter Contractors of America, Inc.
Carrier Johnson
Carter & Burgess, Inc.
CDI Engineering Solutions, Inc.
CDI Marine Company
Ceco Concrete Construction, LLC
CentiMark Corporation
CH2M HILL Companies, Ltd.
Chapco Ltd.
Chicago Bridge & Iron Company N.V. [CBI]
Chieftain Group plc
Childs Mascari Warner Architects
Chiles Architects, Inc.
China Architectural Engineering, Inc. [CAEI]
Christenson Electric, Inc.
Clestra Hauserman
CMX L.L.C.
Cofely Nederland NV
Coleman Floor, LLC
Colson & Colson General Contractor Inc.
Comfort Systems USA, Inc. [FIX]
Comp-Utility Corporation
Component Assembly Systems, Inc.
Conti Electric, Inc.
Controlled Demolition, Inc.
Conundrum Technologies, Inc.
Cornejo & Sons, Inc.
Corrpro Companies, Inc.
Crawford Architects Pty Limited
CTC Marine Projects Limited
Cupertino Electric, Inc.
Curtins Consulting Engineers plc

D. C. Taylor Co.
Dallas Contracting Co., Inc.
Danze & Davis Architects, Inc
David Evans and Associates, Inc.
DBC Construction, Inc.
Dean Ryan Consultants & Designers, Inc.
Dewberry
Dick Clark Architecture LLC
Doosan Babcock Energy Limited
Downer EDI Limited
Ducts Unlimited Mechanical Systems, Inc.
Dudek
Dynamic Systems, Inc.

E M C Engineers, Inc.
E&M Concrete Construction, Inc.
E-J Electric Installation Co.
Ecker Enterprises, Inc.
Edd Helms Group, Inc.
EEI Holding Corporation
Einhorn Yaffee Prescott Architecture & Engineering, P.C.
Elecnor, S.A.
Ellerbe Becket, Inc.
EMCOR Group (UK) plc
EMCOR Group, Inc. [EME]
EMJ Corporation
End Systems Limited
Engineering Solid Solutions, Inc.
Entech Sales and Service Inc.
Enterprise Electric, LLC
Entrx Corporation
Envoy, Inc.
Epstein
ESTec Systems Corp.
Excel Interior Construction Corporation

Facility Group, Inc.
Faith Technologies, Inc.
Fehlman LaBarre Architects, Inc.
Field Systems Designs Plc
FieldTurf Tarkett
Fisk Corporation
Florida Technical Services, LLC
Fluor Federal Services, Inc.
Forest Electric Corp.
Frazer-Nash Consultancy Ltd.
FRCH Design Worldwide
Freese and Nichols, Inc.
Fru-Con Construction Corporation
Fuscoe Engineering, Inc.

G.H. Marshall Ltd.
Gannett Fleming, Inc.
Garcia Roofing, Inc.
GEC Associates, Inc.
Geotechnics, Incorporated
Ginger SA
Global Sports Systems, Inc.
Goodman Networks, Inc.
Gorman Richardson Architects, Inc.
Graeber Simmons & Cowan, Inc.
Greenman-Pedersen, Inc.
Ground Construction Ltd.
Groupe SNEF
GS Engineering & Construction Corporation
GSH Group plc
Guarantee Electrical Company

Halcrow Group Ltd
Halliburton Electrical Ltd.
Harley Ellis Devereaux Corporation
Hatch Mott MacDonald
Hayward Baker Inc.
Hazen and Sawyer, P.C.
HDR, Inc.
Heery International, Inc.
Helix Electric, Inc.
Henkels & McCoy, Inc.
High Tech Electric, LLC
High-Point Rendel Ltd.
Hills Electrical & Mechanical plc
Hirsch Bedner Associates Design Consultants
HKS, Inc.
HMC Architects
HNTB Companies
HOK Group, Inc.
Honshy Electric Co., Inc.
Huitt-Zollars, Inc.

Industrial Specialty Contractors, L.L.C.
Industrial TurnAround Corporation
Infinity Contractors International, Ltd.
InfrastruX Group, Inc.
INSTALLS inc, LLC
InStar Services Group, LP
Integrated Electrical Services, Inc. [IESC]
Integrated Management Services, P.A.
InteQuest Corp.
Interior Architects, Inc.
Irby Construction Company
Irex Contracting Group
Island Architects, Inc.
Ivan Allen Workspace, LLC

J. F. Ahern Co.
J.C. Higgins Corp.
J.J. Sosa & Associates, Inc.
J.L. Patterson & Associates, Inc.
Jacobson & Company, Inc.
JCM Facilities Planning and Management
Jelec Inc.
JH Kelly, LLC
JJJ Floor Covering, Inc.
John J. Kirlin, LLC
John Portman & Associates, Inc.
Johnson Contractors, Inc.
Johnson Fain Partners
Jorda Enterprises, Inc.
Joseph R. Loring & Associates, Inc.
Joseph Wong Design Associates, Inc.

K4 Architecture, LLC
Kajima USA Inc.
Kell Muñoz Architects, Inc.
Keller Group plc
Kelso-Burnett Co.
Keltbray Ltd
KHS&S Contractors
Kiewit Power Engineers Co.
Kimley-Horn and Associates, Inc.
Kimmins Contracting Corp.
Kinetic Systems, Inc.
Kleinknecht Electric Company, Inc.
KML Engineering Ltd
Kohn Pedersen Fox Associates, PC
KPA Associates, Inc.
KSW, Inc. [KSW]

La Cañada Design Group, Inc.
Langdon Wilson Architecture Planning Interiors
Lauren Engineers & Constructors, Inc.
Lee, Burkhart, Liu, Inc.
Leighton Group, Inc.
Leo A Daly Company
Lewis Tree Service, Inc.
Limbach Facility Services LLC
Loebl Schlossman & Hackl
LopezGarcia Group Inc.
Lorne Stewart PLC
Lummus Technology
Lundy Services, Inc.
LZT Architects, Inc.

M+W Zander U.S. Operations, Inc.
M. Arthur Gensler Jr. & Associates, Inc.
MACTEC, Inc.
Maeda Corporation
Maguire Group, Inc.
Malcolm Pirnie, Inc.
Manafort Brothers, Inc.
Mancini Duffy
Manrochem Limited
Mansell plc
Marelich Mechanical Co., Inc.
Martinez + Cutri Corporation Architects
Masco Contractor Services, LLC
Mass. Electric Construction Co.
Maxons Restorations, Inc.
McCloskey Mechanical Contractors, Inc.
MCG Architects
McKinstry Co., LLC
McPhee Electric Ltd.
McVicker Associates, Inc.
Mears Group PLC
Mears Group, Inc.
MECS, Inc.
Megatran, Inc.
Michael Baker Jr., Inc.
Michels Corporation
Milam & Co. Painting, Inc.
Miller Electric Company
Miller Electric Construction Inc.
MMC Corp
MMR Group, Inc.
MODEC, Inc.
Molzen-Corbin & Associates, P.A.
Morris Architects Inc.
Morrow-Meadows Corporation
Motor City Electric Co.
Mott MacDonald Group Limited
Mouchel Rail Limited
Murphy Company Mechanical Contractors And Engineers
Mustang Engineering Holdings, Inc.
MWH Global, Inc.

Nadel Architects, Inc.
Nasland Engineering
NBBJ
Netherlands Engineering Consultants B.V.
Nikken Sekkei Ltd.
Ninyo & Moore Geotechnical & Environmental Sciences Consultants
Nolte Associates Inc.
North American Theatrix, Ltd.
NTD Architects
Nuprecon L.P.

O'Brien & Gere Limited
O'Connell Robertson, Inc.
Offshore Oil Engineering Co., Ltd.
Onsite Energy Corporation [ONSE.PK]
Opus Group Berhad
Opus South Corporation
Oregon Electric Construction, Inc.

Page Southerland Page, LLP
Parker Bromley Ltd.
Parsons Brinckerhoff Inc.
Parsons Electric, LLC
Parsons Infrastructure & Technology Group
Paul J. Sierra Construction, Inc.
PCI Energy Services, LLC
Performance Contracting Group, Inc.
Perkins + Will, Inc.
Perkins Eastman Architects PC
Perkowitz + Ruth Inc.
Petrin Corporation
Petrocelli Electric Co. Inc.
Petrofac Limited
Pfluger Associates Architects, L.P.
Phillips National, Inc.
Phoenix Management, Inc.
Pickens Roofing Inc.
Pike Electric Corporation [PIKE]
PKL Group (UK) Ltd
Polkinghorn Group Architects Inc.
Populous, Inc.
PremierGarage Systems, LLC
Pro2Serve Professional Project Services, Inc.
Process Plus, LLC
Project Design Consultants

Quanta Services, Inc. [PWR]

R.A. Smith National, Inc.
R.G. Vanderweil Engineers, Inc.
Radius Engineering Intl., Inc.
RailWorks Corporation
RBB Architects Inc.
RECON Environmental, Inc.
Remco Maintenance, LLC
Renaissance 3 Architects, P.C.
Rex Moore Electrical Contractors & Engineers
Richard Goettle, Inc.
Rick Engineering Company
RJC Architects Inc.
RMJM
Roesling Nakamura Terada Architects, Inc.
Rose Paving Company
Rosendin Electric, Inc.
Rothenberg Sawasy Architects, Inc.
RTKL Associates Inc.

S & B Engineers and Constructors, Ltd.
S&ME, Inc.
Sachs Electric Company
Sadi Servizi Industriali S.p.A.
Salerno/Livingston Architects
Sandwell International Inc.
Sargent & Lundy LLC
Sargent Electric Company
SASCO
SBLM Architects, P.C.
Schuff International, Inc. [SHFK.PK]
SCS Engineers
Seneca Companies
Service Electric Co. Inc.
Severfield-Rowen Plc
SGPA Planning and Architecture San Diego
Sharpfibre Ltd.
Shen Milsom & Wilke, Inc.
Shlemmer+Algaze+Associates Interiors & Architecture, Inc
Sidney Cubbage (Heating & Ventilating) Limited
Siemens Industry, Inc.
Sino-Thai Engineering and Construction Public Company Limited
Skidmore, Owings & Merrill LLP
Smith Consulting Architects
SmithGroup, Inc.
SNC-Lavalin Group Inc.
Southern Electric Contracting Limited
Southland Industries Inc.
Speer Mechanical, Inc.
SPIE SA
Sportexe Construction Services, Inc.
Steeplejack Industrial Group Inc.
Stewart Builders, Ltd.
Straight Line Industries, Inc.
Structural Group
STS Consultants, Ltd.
Stuart Dean Company, Inc.
STV Group, Incorporated
SubZero Constructors, Inc.
Sukut Construction, Inc.
Suncoast Post-Tension, LP.
Sunland Group, Inc.
Superior Air Handling Corporation
Susman Tisdale Gayle Architects, Inc.
SWP Group PLC
Syska Hennessy Group, Inc.

T. Clarke plc
TAG International, L.L.P.
Tata Group
Tata Sons
TBG Partners
TDIndustries, Ltd.
Technology Service Corporation
Tecta America Corp.
Teng & Associates, Inc.
Terracon Consultants, Inc.
The Austin Company
The Benham Companies, LLC
The Berlin Steel Construction Company
The Blakley Corporation
The Bommarito Group, Inc.
The Brock Group of Companies
The Cruz Corporation
The Day & Zimmermann Group
The Holland Roofing Group LLC
The Jerde Partnership
The Kleinfelder Group, Inc.
The Korte Company
The Lawrence Group Architects
The Louis Berger Group, Inc.
The Mason & Hanger Group Inc.
The Nead Organization
The Newtron Group, Inc.
The Stellar Group
Therma Corporation
Thinkpath Inc. [THPHF.PK]
Thornton Tomasetti, Inc.
ThyssenKrupp Palmers Ltd.
TIMEC Company, Inc.
TPI Acquisition, Inc.
Trandes Corporation
TREVI-Finanziaria Industriale S.p.A.
Tri-City Electrical Contractors, Inc.
Tri-City Mechanical, Inc.

United Forming, Inc.
United Subcontractors, Inc.
University Mechanical & Engineering Contractors, Inc.
UOP Ltd.
Urata & Sons Cement, Inc.

Valverde Construction, Inc.
Vario Construction Company, Inc.
Varley and Gulliver Ltd.
Vector Engineering, Inc.
Velosi Limited

W. G. Valenzuela Drywall, Inc.
W.W. Gay Mechanical Contractor, Inc.
Walter P. Moore and Associates, Inc.
Washington Division of URS Corporation
Waterman Group plc
WaterMasters Restoration, Inc.
Wayne J. Griffin Electric, Inc.
Weeks Marine, Inc.
Welsbach Electric Corp.
Western Construction Group
Western States Fire Protection Company
White Young Green Plc
Widom Wein Cohen O'Leary Terasawa
Wilbur Smith Associates, Inc.
Willdan Geotechnical
Wirt Design Group
WK Dickson & Co., Inc.
Wolcott Architecture Interiors
Wolfberg Alvarez & Partners, Inc.
Wood, Patel & Associates, Inc.
WR Refrigeration Limited
WS Atkins plc
WSP Flack + Kurtz, Inc.
WSP Group plc

X-nth, Inc.

Zimmer Gunsul Frasca Architects LLP
Zone Mechanical, Inc.