| Members |
| A & K Specialty Contractors, Inc. |
| A & W Plumbing & Heating, Inc. |
| A and K Rentals, LLC |
| A.S.P. Enterprises, Inc. |
| Advanced Drainage Systems (A.D.S.) |
| Allen Roofing |
| Allied Roofing & Exteriors |
| American Burglary & Fire, Inc. |
| Anderson Overhead Door |
| Anna Quarries, Inc. |
| Artisan Contracting Co., Inc. |
| Associated Lumber |
| Assurance Brokers Ltd. |
| Atlas Iron Works |
| Atlas Supply Company, Inc. |
| Automatic Fire Sprinkler |
| Baer Heating & Cooling, Inc. |
| Baker Corp. |
| Bank of Springfield |
| Barcom Electronics, Inc. |
| Baxmeyer Construction, Inc. |
| Beco Concrete Products, Inc. |
| Behrmann Company |
| Bel-O Cooling & Heating, Inc. |
| Bel-O Sales and Service, Inc. |
| Belleville Supply Company, Inc. |
| Bloomsdale Excavating Co., Inc. |
| Bollmeier Crane & Lift |
| Boyer Fire Protection |
| Breckenridge of Illinois, LLC |
| Breckenridge of Illinois, LLC |
| Brewster Companies |
| Briteway Striping Services, Inc. |
| Bruce Concrete Construction, Inc. |
| Bruce S. Bonczyk, Ltd. |
| Budrovich Contracting |
| Building Products Corp. |
| Butler Supply |
| Byrne & Jones Construction |
| Byrne Software Technologies, Inc. |
| Byron Carlson Petri & Kalb, LLC |
| Carbondale Brick & Block |
| Carter Waters Corporation-Attn.: Doug Ivins |
| CCMSI/CCSFI |
| Civil Design, Inc. |
| CK Power Products |
| Collins & Hermann, Inc. |
| Comm Squad |
| Commerce Trust Company |
| Commercial Door & Hardware Service |
| Commercial Landscape Services, Inc. |
| Concrete Supply of IL |
| Connor Co. |
| Contech Engineered Solutions, LLC |
| Contegra Construction Company, L.L.C. |
| Cooper B-Line |
| County Materials Corporation |
| Crescent Electric Supply Co. |
| Crown C Supply Co., Inc. |
| CTS Technology Solutions, Inc. |
| Cummins Mid-South |
| D.E. Martin Roofing Co., Inc. |
| Da-Com Corporation |
| DePew & Owen Builders, Inc. |
| Diel & Forguson, LLC |
| DMS Contracting, Inc. |
| Donco Electrical Construction LLC |
| Drilling Service Co. |
| Durbin Enterprises, Inc. |
| DWG & Associates, Inc. |
| E.T. Simonds Construction Co. |
| East County Transport |
| Eaton Corporation |
| Egyptian Business Furniture |
| Ehret, Inc. |
| Energy Culvert Company, Inc. |
| Engineered Fluid, Inc. |
| Engineered Industrial Products |
| Enterprise Fleet Management |
| Environmental Operations of Illinois, LLC |
| Envirotech, Inc. |
| Evans Construction Co. |
| Excel Plumbing, Inc. |
| Eye On Design Drapery, Shutters & Blinds, Inc. |
| Fabick CAT |
| Faco, LLC |
| Fager-McGee Commercial Construction, Inc. |
| Federal Steel and Erection Co. |
| Fire Safety, Inc. |
| First National Bank of Waterloo |
| Flo-Systems, Inc. |
| Focal Pointe Outdoor Solutions, Inc. |
| Followell Construction Co., Inc. (FCCI) |
| Fred Weber, Inc. |
| Freeman Environmental Services, Inc. |
| Frost Supply |
| G. W. Van Keppel Company |
| G.L. Warren Construction, Inc. |
| Gateway FS, Inc. |
| Gateway Infrastructure Services, L.L.C. |
| 1 2 3 4 |