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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Mackaben, Chad | Belle Fourche, SD | — | Installer | — |
| Magnusson, Michal | Spearfish, SD | — | Installer | — |
| Malsam, Christopher | Hosmer, SD | — | Installer | — |
| Mann, Guy | Rapid City, SD | — | Installer | — |
| Martin, Millard Wesley | Beresford, SD | — | Installer | — |
| Mcalister, Marshal | Summerset, SD | — | Installer | — |
| Mccaskell, Scott | Rapid City, SD | — | Installer | — |
| Mckee, Brian | Akron, SD | — | Installer | — |
| Mcpherson, Michael | Rapid City, SD | — | Installer | — |
| Medcalf, Joshua | Fort Pierre, SD | — | Installer | — |
| Mercer, Gordon | Spearfish, SD | — | Installer | — |
| Merchen, Daren | Hot Springs, SD | — | Installer | — |
| Mettler, James | Menno, SD | — | Installer | — |
| Meverden, Jesse | Black Hawk, SD | — | Installer | — |
| Meyers, Anthony | Cavour, SD | — | Installer | — |
| Miller, Cameron | Hermosa, SD | — | Installer | — |
| Miller, Randy E | Lake Norden, SD | — | Installer | — |
| Mohr, Scott A | Rapid City, SD | — | Installer | — |
| Moore, Steven | Rapid City, SD | — | Installer | — |
| Moos, Ronald | Custer, SD | — | Installer | — |
| Morales, Jordan | Spearfish, SD | — | Installer | — |
| Morgan, Mitchell | Mitchell, SD | — | Installer | — |
| Morgan, Randall | Letcher, SD | — | Installer | — |
| Morris, John | Pierre, SD | — | Installer | — |
| Morris, Mitch M | Rapid City, SD | — | Installer | — |
| Moxness, Paul | Waubay, SD | — | Installer | — |
| Mulz, Richard | Rapid City, SD | — | Installer | — |
| Munro, Kirk E | Spearfish, SD | — | Installer | — |
| Munro, Reese | Spearfish, SD | — | Installer | — |
| Murphree, Jonathan L | Rapid City, SD | — | Installer | — |
| Myers, Wyatt L | Fort Pierre, SD | — | Installer | — |
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