| ACCO Unlimited Corporation |
| Accujet |
| Ahlers & Cooney, P.C. |
| Ahnemann Associates |
| Alliant Energy |
| Anderson Bogert Engineers and Surveyors |
| Asphalt Paving Association of Iowa |
| ATURA architecture |
| BDC Group, Inc |
| Beck Engineering, Inc. |
| BerganKDV |
| Black Hills Energy |
| Blue Horizon Energy |
| Boland Recreation |
| Bolton & Menk |
| Braun Intertec |
| Bray Architects |
| Burbach Aquatics, Inc. – Architects & Engineers |
| Carl A. Nelson & Company |
| City of Coralville |
| Clapsaddle-Garber Associates |
| Commercial Recreation Specialists |
| Community State Bank |
| Connections Inc EAP |
| Copy Systems Inc |
| Core & Main |
| CPMI |
| D.A. Davidson |
| DGR Engineering |
| DIXON Engineering, Inc. |
| Dorsey & Whitney LLP |
| Electrical Products Company |
| Enterprise Fleet Management |
| EOR |
| Experience Waterloo |
| Farnsworth Group, Inc. |
| Fehr Graham |
| Ferguson |
| Foth Infrastructure and Environment |
| FOX Engineering |
| Garden & Associates, Ltd. |
| Gee Asphalt Systems, Inc. |
| gWorks |
| Hall & Hall Engineers |
| HDR |
| Healthy Hometown Powered by Wellmark |
| Holophane/Acuity Brands Lighting |
| Hopkins & Huebner, P.C. |
| HR Green, Inc. |
| ICAP: Iowa Communities Assurance Pool |
| IDNR – Derelict Building, Brownfields, & Iowa Waste Exchange |
| Impact7G, Inc |
| IMWCA |
| Iowa American Water |
| Iowa Association of Municipal Utilities |
| Iowa Concrete Paving Association |
| Iowa Department of Agriculture |
| Iowa Department of Public Health – Community Water Fluoridation Program |
| Iowa Finance Authority |
| Iowa Flood Center |
| Iowa Parks and Recreation Association |
| Iowa Public Agency Investment Trust (IPAIT) |
| Iowa State University |
| Iowa Rural Water Association |
| IPI – Iowa Prison Industries |
| ISG |
| ITC Midwest LLC |
| J&M Displays |
| JCG Land Services |
| JEO Consulting Group |
| JTH Lighting |
| Kay Park Rec Corp |
| Keep Iowa Beautiful |
| LEE Chamberlin Consultant Engineers |
| Legat Architects |
| Lincoln Savings Bank |
| Lynch Dallas, P.C. |
| MacQueen Equipment |
| Martin Gardner Architecture, P.C. |
| McClure |
| Med Compass Mobile Health Services |
| Mediacom Business |
| MidAmerican Energy Company |
| Midwest Municipal Consulting, LLC |
| Miron Construction Co., Inc. |
| MMS Consultants, Inc. |
| Modern Builders, Inc. |
| MSA Professional Services, Inc. |
| Municipal Pipe Tool Company |
| Murphy Tower Service |
| Musco Sports Lighting |
| Neapolitan Labs |
| NLC Service Line Warranty Program by HomeServe |
| Northern Illinois University |
| Northland Securities, Inc. |
| Olsson |
| OPG-3, Inc. |
| Origin Design |
| Pay N Seconds |
| PeopleService |
| Petersen Mfg Co |
| PFM Financial Advisors LLC |
| Piper Sandler |
| Point Builders, LLC |
| Polco |
| PUBLIQ Software |
| RDG Planning & Design |
| Republic Services |
| SAM Companies |
| Shive-Hattery |
| Short Elliott Hendrickson Inc. |
| Snyder & Associates, Inc. |
| SOCS Websites+Apps & Filament Essential Services |
| Solutions, Inc. |
| Speer Financial, Inc. |
| Stanley Consultants |
| SUDAS |
| TC Networks, Inc |
| TIPS – The Interlocal Purchasing System |
| TownCloud, Inc. |
| Toyne Inc |
| Traffic Control Corporation |
| Trees Forever |
| TrueNorth Companies |
| Tyler Technologies |
| Ulteig |
| UMB Bank |
| UNIQUE Paving Materials Corp. |
| US Cellular Business |
| USW Utility Group |
| Van Wert Company |
| VC3 |
| Vector Disease Control International (VDCI) |
| Veenstra & Kimm, Inc. |
| Visu Sewer Inc |
| Voya Financial Advisors |
| Waters Edge Aquatic Design |
| Wisconsin Surplus Online Auction |
| Zencity |
| Ziegler Power Systems |
