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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Waldner, Ron W | Whitewood, SD | — | Installer | — |
| Walker, Dana | Sturgis, SD | — | Installer | — |
| Walsh, Dennis | Dakota City, SD | — | Installer | — |
| Walters, Hudson | Spearfish, SD | — | Installer | — |
| Waterman, Dan | Hawarden, SD | — | Installer | — |
| Watson, Ty | Crawford, SD | — | Installer | — |
| Waxler, Chris | Custer, SD | — | Installer | — |
| Weaver, Danielle | Rapid City, SD | — | Installer | — |
| Weber, Paul | Woonsocket, SD | — | Installer | — |
| Weige, David | Rapid City, SD | — | Installer | — |
| Weis, Barry | Deadwood, SD | — | Installer | — |
| Wells, Chris | Rapid City, SD | — | Installer | — |
| West, Dylan | Pierre, SD | — | Installer | — |
| Westland, Zachary | Belle Fourche, SD | — | Installer | — |
| Wheeler, Chase | Belle Fourche, SD | — | Installer | — |
| Wheeler, Loren A | Whitewood, SD | — | Installer | — |
| Wieczorek, Rick | Rapid City, SD | — | Installer | — |
| Wiedmer, Adam C | Spearfish, SD | — | Installer | — |
| Wilen, Matt | Spearfish, SD | — | Installer | — |
| Wilkins, Steven | Custer, SD | — | Installer | — |
| Wilkinson, Clifford W | Elk Point, SD | — | Installer | — |
| Williams, Britt | Fort Pierre, SD | — | Installer | — |
| Williams, Jeremy C | Deadwood, SD | — | Installer | — |
| Williams, Joel A | Sturgis, SD | — | Installer | — |
| Williams, Mike J | Sturgis, SD | — | Installer | — |
| Williams, Paul | Rapid City, SD | — | Installer | — |
| Williamson, Reed K | Belle Fourche, SD | — | Installer | — |
| Willis, Jesse J | New Underwood, SD | — | Installer | — |
| Winemiller, Eric | Spearfish, SD | — | Installer | — |
| Wipf, Ben | Huron, SD | — | Installer | — |
| Wipf, Wayne | White, SD | — | Installer | — |
| Wiseman, Tom | Sioux Falls, SD | — | Installer | — |
| Wisser, Rick | Lead, SD | — | Installer | — |
| Witmer, Trenton L | Watertown, SD | — | Installer | — |
| Woelber, Jason | Pipestone, SD | — | Installer | — |
| Woelber, Rand | Belle Fourche, SD | — | Installer | — |
| Wollmann, Alex L | Freeman, SD | — | Installer | — |
| Wolterstorff, Terry | Belle Fourche, SD | — | Installer | — |
| Woodford, Tanner | Custer, SD | — | Installer | — |
| Woods, Dana X | Wagner, SD | — | Installer | — |
| Wright, James | Hoven, SD | — | Installer | — |
| Wurtz, Richard | Whitewood, SD | — | Installer | — |
| Wurtz, Richard P | Rapid City, SD | — | Installer | — |
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