| Advanced Engineering and Environmental Services, LLC (AE2S) | 3M |
| Ag Processing Inc (AGP) | Actalent |
| Ames Construction | Adams Thermal Systems |
| Appareo Systems | Aerostar International |
| Applied Engineering, Inc | Ag Processing Inc (AGP) |
| ASN Constructors | AGCO Corporation |
| Banner Associates, Inc. | American Engineering Testing |
| Barnard Construction | Banner Engineering Corp. |
| Bartlett & West | Basin Electric Power Cooperative |
| Beck Engineering, Inc. | Burns & McDonnell |
| Benesch | CF Industries |
| Blattner Energy | Christensen Farms & Feedlots, Inc. |
| Bolton & Menk, Inc. | Dahmes Stainless, Inc. |
| Boyd Jones | Dakota Tube, Inc |
| Bradbury Stamm Construction, Inc. | Daktronics |
| Brosz Engineering, Inc. | DGR Engineering |
| Burns & McDonnell | Diamond Mowers. LLC |
| BX Civil & Construction | DJ&A, P.C. |
| Chief Industries | DLR Group |
| Christensen Farms & Feedlots, Inc. | Doosan Bobcat |
| City of Sioux Falls - Engineering | Driven Fire Consultants |
| Civil Design Inc | Easy Automation Inc |
| CMBA Architects | Electrical Consultants, Inc. |
| Collins Aerospace | Emanuelson-Podas |
| Concrete Strategies | empirical foods, inc. |
| Consolidated Construction Co., Inc | Energy Panel Structures Inc |
| Crestone Companies | Falcon Plastics |
| CRH - OMNI Division | FEDERAL AVIATION ADMINISTRATON (FAA) - CSA ENGINEERING SERVICES |
| Daktronics | Federated Insurance |
| DCI Engineers | First PREMIER Bank/PREMIER Bankcard |
| Demco Mfg | G & R Controls |
| DGR Engineering | GE HealthCare |
| DLR Group | Graco Inc. |
| Dunham Associates, Inc | Great Dane |
| E & A Consulting Group, Inc | Great West Casualty Company |
| Eagle Construction | Groschopp, Inc. |
| Electrical Consultants, Inc. | Henkel |
| Energy Panel Structures Inc | Hormel Foods Corporation |
| Engineering & Construction Innovations, Inc. | Horton, Inc. |
| FCI Constructors, Inc. | Horwitz, Inc. |
| FEH Design | Howe, Inc. |
| Felsburg Holt & Ullevig | Innovative Systems, LLC |
| GeoTek Engineering | Interstates |
| Hausmann Construction | KBR -- South Dakota |
| HDR, Inc. | Kinze Manufacturing, Inc. |
| Heartland Energy | Link Manufacturing Ltd |
| Heidelberg Materials | MASABA, Inc. |
| Henry Carlson Construction, LLC | Mechanical Sales Inc. SD/Pear Inc. |
| Hensel Phelps | Micro Trak Systems |
| Holcim US | Midwest Manufacturing |
| Hormel Foods Corporation | Miller Electric Mfg LLC |
| Houston Engineering | Minn-Dak Farmers Cooperative |
| Howe, Inc. | Minnesota Natural Resources Conservation Service |
| HR Green | Minnesota Valley Electric Cooperative |
| IMEG | Minnkota Power Cooperative |
| Indian Health Service, OEH & E - South Dakota | Minntronix Inc |
| Infrastructure Design Group, Inc. | Morrissey Engineering |
| Interstate Engineering | Mortenson |
| Interstates | NASCEN Technology |
| ISG | Nebraska Public Power District |
| Journey Group | Northern Natural Gas |
| KC Engineering, P.C. | Northwestern Energy |
| Kirkham Michael | Pella Corporation |
| Klinger Companies | POET |
| KLJ | POWER Engineers, Inc. |
| Kraus-Anderson Construction Company | Power System Engineering (PSE) |
| L S Engineers, Inc. | Power/Mation |
| L.G. Everist Inc. | Prairie AquaTech |
| Landscapes Unlimited LLC | Prinsco |
| McGough | Raven Industries |
| McLaury Engineering, Inc. | RELCO, a Koch Separation Solutions Company |
| Meyer Contracting, Inc. | RFA Engineering |
| Midwest Manufacturing | Rosenboom Machine and Tool, Inc. |
| Minnesota Department of Transportation | Sandhills Global, Inc. |
| Minnesota Department of Transportation - District 7 | Sanford Underground Research Facility |
| Minnesota Natural Resources Conservation Service | Scull Construction Service Inc. |
| Moore Engineering, Inc. | SDSU - Army ROTC |
| Mortenson | Sencore, Inc. |
| NEBCO, Inc. | South Dakota Department of Agriculture and Natural Resources |
| Otter Tail Power Company | South Dakota School of Mines & Technology |
| PCL Construction, Inc | South Dakota State University |
| Persona Signs, LLC | Spartronics |
| POET | STAR Energy Services LLC |
| Puetz Design + Build | Sterling Computers |
| R and G Construction Co. | Superior Industries & Westmore Industries |
| Raker Rhodes Engineering, LLC | TEAM Industries, Inc. |
| Rice Lake Construction Group | Tech Ord - A Division of AMTEC Corporation |
| Sayre Associates, Inc. | Terex Corporation |
| Schemmer Associates Inc | Tetra Pak |
| Scull Construction Service Inc. | The Arthur Companies, Inc. |
| SD Board of Technical Professions | TKDA |
| SDSU - Army ROTC | Trail King Industries |
| Sentry Crane Services | TSP Inc. |
| Settje Agri-Services & Engineering, Inc. | Twin City Fan Companies, Ltd. |
| Shoemaker & Haaland Professional Engineers, Inc. | U.S. Department of Agriculture (USDA) |
| Short Elliott Hendrickson Inc. | Unverferth Manufacturing Company Inc. |
| South Dakota Department of Agriculture and Natural Resources | US Navy |
| South Dakota Department of Transportation | VAA, LLC |
| South Dakota Engineering Society | Valero |
| SPN and Associates | Valley Queen Cheese |
| Stine Seed Company | Vermeer Corporation |
| Stockwell Engineers Inc. | Viaflex |
| Stone Group Architects | Vishay |
| Summit Materials | Vishay |
| Superior Industries & Westmore Industries | WARRIOR MFG., LLC |
| The Arthur Companies, Inc. | West Plains Engineering |
| TSP Inc. | Western Area Power Administration (WAPA) |
| Turner Construction Company | Willmar Electric Service |
| U.S. Army Corps of Engineers - Omaha District | WSB & Associates, Inc. |
| U.S. Department of Agriculture (USDA) | Wurth Elektronik |
| WARRIOR MFG., LLC | |
| White Cap | |
| Whiting-Turner Contracting Company |
| Willmar Electric Service | |
| WSB & Associates, Inc. | |
| Younglove Construction, L.L.C. |
