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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Akley, Tyrel | Rapid City, SD | — | Installer | — |
| Alexander, Dallas D | Hill City, SD | — | Installer | — |
| Anderson, Joel | Box Elder, SD | — | Installer | — |
| Anderson, Mike J | Deadwood, SD | — | Installer | — |
| Anderson, Randall | Pierre, SD | — | Installer | — |
| Anderson, Scott | Spearfish, SD | — | Installer | — |
| Arizmendis, Ciro Jr. | Gregory, SD | — | Installer | — |
| Arneson, Melvin | Enning, SD | — | Installer | — |
| Arp, Michael | Newcastle, SD | — | Installer | — |
| Atkins, Robert | Sturgis, SD | — | Installer | — |
| Atkinson, Eli | Spearfish, SD | — | Installer | — |
| Austreim, Andrew R | Brookings, SD | — | Installer | — |
| Axmaker, Adam | Smithwick, SD | — | Installer | — |
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