| Chicago, IL | Krueck & Sexton Architects, Ltd | 30546 | A/E | — |
| Springfield, IL | Kuhn & Trello Consulting Engineers, LLC | 32353 | A/E | — |
| Rockford, IL | Larson & Darby, Inc. | 1747 | A/E | — |
| Naperville, IL | Larson Engineering, Inc. | 18337 | A/E | — |
| Chicago, IL | Latent Design Corporation | 35090 | A/E | — |
| Boston, MA | Leers, Weinzapfel Associates Architects, Inc. | 41001 | A/E | — |
| Chicago, IL | Legat Architects, Inc. | 23357 | A/E | — |
| Oak Brook, IL | Legat Architects, Inc. | 21437 | A/E | — |
| Gurnee, IL | Legat Architects, Inc. | 21687 | A/E | — |
| Moline, IL | Legat Architects, Inc. | 32355 | A/E | — |
| Bloomington, IL | Lewis, Yockey & Brown, Inc. | 27683 | A/E | — |
| Orland Park, IL | Linden Group, Architects, P.C. | 15401 | A/E | — |
| Seattle, WA | LMN Architects LLP | 34286 | A/E | — |
| St Louis, MO | LNB Studio LLC | 35791 | A/E | — |
| Edwardsville, IL | Lochmueller Group, Inc. | 30567 | A/E | — |
| Chicago, IL | Lothan Van Hook DeStefano Architecture LLC | 31521 | A/E | — |
| Chicago, IL | Magnusson Klemencic Associates, Inc. | 29897 | A/E | — |
| Seattle, WA | Magnusson Klemencic Associates, Inc. | 29896 | A/E | — |
| Chicago, IL | Marc Anderson Architects, LLC | 40923 | A/E | — |
| Marion, IL | Marcum Engineering, LLC | 30193 | A/E | — |
| Paducah, KY | Marcum Engineering, LLC | 29521 | A/E | — |
| Chicago, IL | Material Service Testing Inc. | 32363 | A/E | — |
| Peoria, IL | Maurer-Stutz, Inc. | 31059 | A/E | — |
| Evanston, IL | McGuire Igleski & Associates, Inc. | 28352 | A/E | — |
| Chicago, IL | McKissack & McKissack Midwest, Inc. | 41002 | A/E | — |
| Springfield, IL | Melotte Morse Leonatti Parker Ltd. | 30379 | A/E | — |
| O'fallon, MO | Meneses Engineering LLC | 35195 | A/E | — |
| Chicago, IL | MEP Infrastructure Solutions, Inc. | 31350 | A/E | — |
| Greenwood Village, CO | Merrick & Company | 34499 | A/E | — |
| Chicago, IL | METIS Design LLC | 34518 | A/E | — |
| Minneapolis, MN | Meyer Borgman & Johnson, Inc. | 40464 | A/E | — |
| Chicago, IL | Meyer Borgman, Johnson, Inc. | 40465 | A/E | — |
| Chicago, IL | Michael Baker International Inc. | 40835 | A/E | — |
| Chesterfield, MO | Michael K. Swim, Consulting Engineer, Inc. | 32334 | A/E | — |
| Champaign, IL | Midwest Engineering and Testing, Inc. | 32594 | A/E | — |
| East Peoria, IL | Midwest Engineering Associates, Inc. | 31434 | A/E | — |
| Peru, IL | Midwest Testing Service, Inc. | 5172 | A/E | — |
| Downers Grove, IL | Millennia Professional Services of Illinois, Ltd. | 32817 | A/E | — |
| Fairview Heights, IL | Millennia Professional Services of Illinois, Ltd. | 33030 | A/E | — |
| Morton, IL | Millennia Professional Services of Illinois, Ltd. | 33029 | A/E | — |
| Chicago, IL | Moreno Architects Ltd. | 31293 | A/E | — |
| Lisle, IL | Morris Engineering, Inc. | 34294 | A/E | — |
| Chicago, IL | Nest Builders, Inc. | 29590 | A/E | — |
| Chicago, IL | NV5 Consultants, Inc. | 33433 | A/E | — |
| Collinsville, IL | Oates Associates, Inc. | 20405 | A/E | — |
| St Louis, MO | Oculus, Inc. | 31156 | A/E | — |
| Chicago, IL | Onyx Architecture Services, Inc. | 28707 | A/E | — |
| Chicago, IL | Orion Engineers, PLLC | 34580 | A/E | — |
| Chicago, IL | OWP/P Cannon Design, Inc. | 30654 | A/E | — |
| Chicago, IL | Park Fowler Plus PLLC | 40246 | A/E | — |
| Lisle, IL | Patrick Engineering Inc. | 22407 | A/E | — |
| Boston, MA | Payette Associates Inc. | 30147 | A/E | — |
| Chicago, IL | Perkins + Will, Inc. | 25823 | A/E | — |
| Oak Park, IL | Petrea Collaborative, Corp. | 32761 | A/E | — |
| Chicago, IL | PFB Architects, LLC-Chicago | 29148 | A/E | — |
| Kankakee, IL | Piggush Engineering, Inc. | 33658 | A/E | — |
| Homewood, IL | Planera + Reid Architects, Inc. | 31870 | A/E | — |
| Chicago, IL | Primera Engineers, Ltd. | 17350 | A/E | — |
| Peoria, IL | Principal Construction Management+Design LLC | 30702 | A/E | — |
| St Louis, MO | Professional Environmental Engineers, Inc. | 28728 | A/E | — |
| Rock Island, IL | PRVN Consultants, Inc. | 33866 | A/E | — |
| Iowa City, IA | PRVN Consultants, Inc. | 33445 | A/E | — |
| Springfield, IL | Quigg Engineering Inc. | 31661 | A/E | — |
| Oakbrook Terrace, IL | R & G Engineering, LLC | 30900 | A/E | — |
| Chicago, IL | R. L. Millies & Associates, Inc. | 28117 | A/E | — |
| Munster, IN | R. L. Millies & Associates, Inc. | 20706 | A/E | — |
| Chicago, IL | R.M. Chin & Associates Inc. | 22558 | A/E | — |
| Chicago, IL | RADA Architects, Ltd. | 21853 | A/E | — |
| Lisle, IL | Rasa Design Inc. | 40493 | A/E | — |
| Willowbrook, IL | Raths, Raths & Johnson, Inc. | 4352 | A/E | — |
| Champaign, IL | RATIO States, LLC | 35437 | A/E | — |
| Chicago, IL | RATIO States, LLC | 35438 | A/E | — |
| Indianapolis, IN | RATIO States, LLC | 35436 | A/E | — |
| Peoria, IL | Raymond L. Goodson Jr. Inc. | 34794 | A/E | — |
| Champaign, IL | Reifsteck Reid & Company Architects | 20616 | A/E | — |
| Springfield, IL | Reliable Environmental Solutions, Inc. | 30713 | A/E | — |
| Evanston, IL | Revive Architecture LLC | 33971 | A/E | — |
| Rockford, IL | Richard L. Johnson Associates, Inc. | 1394 | A/E | — |
| Chicago, IL | Rivetna Architects, Inc. | 40783 | A/E | — |
| Baltimore, MD | RMF Engineering, Inc., P.C. | 28624 | A/E | — |
| New York, NY | Robert A. M. Stern Architects, LLP | 30607 | A/E | — |
| Schaumburg, IL | RTM Engineering Consultants, LLC | 34762 | A/E | — |
| Belleville, IL | RTM Engineering Consultants, LLC | 35830 | A/E | — |
| Chicago, IL | Rubinos & Mesia Engineers, Inc. | 3473 | A/E | — |
| Fort Wayne, IN | S2 Architects, LLC | 41200 | A/E | — |
| Rockford, IL | Saavedra Group Architects, Inc. | 27679 | A/E | — |
| Chicago, IL | Salas O'Brien Central, Inc. | 21370 | A/E | — |
| Elk Grove Village, IL | Sanchez & Associates P.C. | 30779 | A/E | — |
| Boston, MA | Sasaki Associates, Inc. | 16336 | A/E | — |
| Chicago, IL | Scalaplus Inc. | 40323 | A/E | — |
| O'fallon, IL | SCI Engineering, Inc. | 26814 | A/E | — |
| Rockford, IL | SE/Coady Architects, LLC | 29991 | A/E | — |
| Lexington, KY | Senez Consulting Inc. | 40842 | A/E | — |
| Chicago, IL | Senga Architects Inc. | 34456 | A/E | — |
| Chicago, IL | Shah Ragan Arjona PLLC | 40318 | A/E | — |
| Chicago, IL | Shannon & Wilson, Inc. | 41033 | A/E | — |
| St Louis, MO | Shannon & Wilson, Inc. | 34805 | A/E | — |
| Seattle, WA | Shannon & Wilson, Inc. | 34804 | A/E | — |
| Iowa City, IA | Shive-Hattery, Inc | 40046 | A/E | — |
| Bettendorf, IA | Shive-Hattery, Inc | 40047 | A/E | — |
| Valparaiso, IN | Shive-Hattery, Inc | 40045 | A/E | — |
| Chicago, IL | Shive-Hattery, Inc. | 34076 | A/E | — |
| South Bend, IN | Shive-Hattery, Inc. | 41014 | A/E | — |
| Lake Zurich, IL | Sight On Solutions, Inc. | 40433 | A/E | — |
| Chicago, IL | Simpson Gumpertz & Heger, Inc. | 33830 | A/E | — |
| Waltham, MA | Simpson Gumpertz & Heger, Inc. | 31053 | A/E | — |
| Chicago, IL | Singh & Associates Inc. | 20006 | A/E | — |
| Chicago, IL | Site Design Group, Ltd. | 28706 | A/E | — |
| Chicago, IL | Skidmore, Owings & Merrill LLP | 1886 | A/E | — |
| Decatur, IL | SKS Engineers, LLC | 32240 | A/E | — |
| Oak Park, IL | Smith Seckman Reid, Inc. | 32085 | A/E | — |
| Nashville, TN | Smith Seckman Reid, Inc. | 29951 | A/E | — |
| Chicago, IL | SmithGroup, Inc. | 32114 | A/E | — |
| Chicago, IL | SMNG A Ltd. | 33336 | A/E | — |
| Decatur, IL | SNDB Designs, Inc. | 28475 | A/E | — |
| Chicago, IL | Solomon, Cordwell, Buenz & Associates, Inc. | 26141 | A/E | — |
| St Louis, MO | Solutions AEC, LLC | 40676 | A/E | — |
| Chicago, IL | SPAAN Tech, Inc. | 29103 | A/E | — |
| Park Ridge, IL | Spagnolo Enterprises, Ltd. | 34530 | A/E | — |
| Chicago, IL | Specialty Consulting, Inc. | 29944 | A/E | — |
| Rolling Meadows, IL | Specialty Consulting, Inc. | 40907 | A/E | — |
| Toledo, OH | SSOE Architects, PLLC | 33914 | A/E | — |
| Chicago, IL | Stanley Consultants, Inc. | 1892 | A/E | — |
| Chicago, IL | Stantec Architecture Inc. | 31616 | A/E | — |
| Berkley, MI | Stantec Architecture Inc. | 33349 | A/E | — |
| Chicago, IL | Stantec Consulting Services Inc. | 30362 | A/E | — |
| Chicago, IL | Stearn - Joglekar, Ltd. | 19884 | A/E | — |
| Springfield, IL | Steckel-Parker Architects, Inc. | 3592 | A/E | — |
| Chicago, IL | STL Architects, Inc. | 26684 | A/E | — |
| Chicago, IL | STR Partners LLC | 27509 | A/E | — |
| New Lenox, IL | Stromsland, De Young, Prybys Architecture Group, Inc. | 33399 | A/E | — |
| Chicago, IL | Studio AH, LLC | 33984 | A/E | — |
| Chicago, IL | Studio Gang Architects, Ltd. | 29296 | A/E | — |
| Chicago, IL | Studio GC, Inc. | 30595 | A/E | — |
| Chicago, IL | STV Architects, Inc. | 30077 | A/E | — |
| New York, NY | STV Architects, Inc. | 34779 | A/E | — |
| Douglassville, PA | STV Architects, Inc. | 34780 | A/E | — |
| Chicago, IL | STV Incorporated | 22594 | A/E | — |
| Naperville, IL | SW Consulting & Engineering Services, PLLC | 35742 | A/E | — |
| Chicago, IL | Syska Hennessy Group, Inc. | 31622 | A/E | — |
| New York, NY | Syska Hennessy Group, Inc. | 31621 | A/E | — |
| Chicago, IL | T.Y. Lin International Great Lakes Inc. | 29857 | A/E | — |
| Chicago, IL | Taylor Made Design, Inc. | 31115 | A/E | — |
| Glendale Heights, IL | TEM Environmental, Inc. | 33148 | A/E | — |
| Chicago, IL | Terra Engineering, Ltd. | 25991 | A/E | — |
| Peoria, IL | Terra Engineering, Ltd. | 29121 | A/E | — |
| Chicago, IL | Terracon Consultants, Inc. | 30162 | A/E | — |
| Glendale Heights, IL | Terracon Consultants, Inc. | 29344 | A/E | — |
| St Louis, MO | Terracon Consultants, Inc. | 29343 | A/E | — |
| Bettendorf, IA | Terracon Consultants, Inc. | 29346 | A/E | — |
| Olathe, KS | Terracon Consultants, Inc. | 29342 | A/E | — |
| Chicago, IL | The Architects Enterprise, Ltd. | 18427 | A/E | — |
| Libertyville, IL | The Hezner Corporation | 21110 | A/E | — |
| Schaumburg, IL | The HOH Group, Inc. | 34731 | A/E | — |
| Chicago, IL | The Lamar Johnson Collaborative Inc. | 35002 | A/E | — |
| St Louis, MO | The Lawrence Group Architects of St. Louis, Inc. | 29294 | A/E | — |
| St Louis, MO | The McClure Corporation | 29470 | A/E | — |
| Glastonbury, CT | The S/L/A/M Collaborative, Inc. | 32777 | A/E | — |
| Oak Park, IL | Thomas Engineering Group LLC | 30368 | A/E | — |
| Belleville, IL | Thompson Civil, LLC | 34629 | A/E | — |
| St Louis, MO | Thompson Civil, LLC | 34630 | A/E | — |
| Chicago, IL | Thornton Tomasetti, Inc. | 30045 | A/E | — |
| St Paul, MN | Toltz, King, Duvall, Anderson and Associates, Inc. | 35239 | A/E | — |
| Kansas City, MO | TranSystems Corporation | 26295 | A/E | — |
| Kansas City, MO | TREKK Design Group, LLC | 35917 | A/E | — |
| Fenton, MO | TREKK Design Group, LLC | 40802 | A/E | — |
| Belleville, IL | Trivers Associates, Inc. | 31754 | A/E | — |
| St Louis, MO | Trivers Associates, Inc. | 19822 | A/E | — |
| Huntley, IL | Tropical Environmental, Inc. | 33306 | A/E | — |
| Naperville, IL | True North Consultants, Inc | 30412 | A/E | — |
| Chicago, IL | Tylk Gustafson Reckers Wilson Andrews, LLC | 27680 | A/E | — |
| Chicago, IL | Urban Works, Ltd. | 21740 | A/E | — |
| Edwardsville, IL | Utilitra LLC | 35015 | A/E | — |
| Olney, IL | Utility Safety and Design, Inc. | 29475 | A/E | — |
| Belleville, IL | Utility Safety and Design, Inc. | 29609 | A/E | — |
| Lombard, IL | Valdes Engineering Company | 35227 | A/E | — |
| Chicago, IL | Valerio Dewalt Train Associates P.C. | 22337 | A/E | — |
| Woodstock, IL | Vanderstappen Land Surveying, Inc. | 30354 | A/E | — |
| Bolingbrook, IL | Veenstra & Kimm, Inc. | 40062 | A/E | — |
| Rock Island, IL | Veenstra & Kimm, Inc. | 34337 | A/E | — |
| Springfield, IL | Veenstra & Kimm, Inc. | 34336 | A/E | — |
| Western Springs, IL | Virtual Energy Solutions, Inc. | 33853 | A/E | — |
| Hoffman Estates, IL | Walker Consultants, Inc. | 18334 | A/E | — |
| Chicago, IL | Walker Consultants, Inc. | 29576 | A/E | — |
| Chicago, IL | Wallin-Gomez Architects, Ltd. | 20977 | A/E | — |
| Chicago, IL | Walter P Moore and Associates, Inc. | 40586 | A/E | — |
| Kansas City, MO | Walter P Moore and Associates, Inc. | 34822 | A/E | — |
| Denver, CO | Walter P Moore and Associates, Inc. | 40589 | A/E | — |
| Houston, TX | Walter P Moore and Associates, Inc. | 34821 | A/E | — |
| Austin, TX | Walter P Moore and Associates, Inc. | 40587 | A/E | — |
| Dallas, TX | Walter P Moore and Associates, Inc. | 40588 | A/E | — |
| St Charles, IL | WBK Engineering, LLC | 29442 | A/E | — |
| Champaign, IL | Webb Engineering Services Inc. | 34382 | A/E | — |
| St Louis, MO | Webb Engineering Services Inc. | 30812 | A/E | — |
| Chicago, IL | Weese Langley Klein Architects Ltd. | 34388 | A/E | — |
| Chicago, IL | Wheeler Kearns Architects, Inc. | 20152 | A/E | — |
| Chicago, IL | Whitney Architects, Inc. | 41144 | A/E | — |
| East Dubuque, IL | WHKS & Co. | 30882 | A/E | — |
| Springfield, IL | WHKS & Co. | 30881 | A/E | — |
| Chicago, IL | Wight & Company | 28773 | A/E | — |
| Darien, IL | Wight & Company | 22617 | A/E | — |
| Boston, MA | William Rawn Associates, Architects, Inc. | 33380 | A/E | — |
| Itasca, IL | Williams Associates Architects, Ltd. | 21842 | A/E | — |
| Northbrook, IL | Wiss, Janney, Elstner Associates, Inc. | 7191 | A/E | — |
| Swansea, IL | Woolpert Architecture, LLC | 30361 | A/E | — |
| Dayton, OH | Woolpert, Inc. | 40562 | A/E | — |
| Swansea, IL | Woolpert, Inc. | 29490 | A/E | — |
| Edwardsville, IL | WRF Engineers LLC | 31623 | A/E | — |
| Chicago, IL | WSP USA Buildings Inc. | 34275 | A/E | — |
| St Louis, MO | WSP USA Buildings Inc. | 40346 | A/E | — |
| Chicago, IL | WSP USA Inc. | 40431 | A/E | — |
| Peoria, IL | WSP USA Inc. | 32767 | A/E | — |
| Springfield, IL | WSP USA Inc. | 40432 | A/E | — |
| New York, NY | WSP USA Inc. | 40430 | A/E | — |
| Chicago, IL | Yu & Associates Collaborative, PLLC | 40566 | A/E | — |
| New York, NY | Zimmer Gunsul Frasca Architects LLP | 34327 | A/E | — |
| Los Angeles, CA | Zimmer Gunsul Frasca Architects LLP | 34326 | A/E | — |
| Seattle, WA | Zimmer Gunsul Frasca Architects LLP | 34325 | A/E | — |
| Denver, CO | Zimmer Gunsul Frasca Architects LLP | 40412 | A/E | — |
| Portland, OR | Zimmer Gunsul Frasca Architects LLP | 34324 | A/E | — |
| Washington, DC | Zimmer Gunsul Frasca Architects LLP | 34328 | A/E | — |