Electrical Contractors
| Plan Group | North York, ON, Canada |
| Collins Electrical Co Inc | Stockton, CA |
| R.F. Fisher Electric Company | Kansas City, KS |
| Cochran Electric Inc | Seattle, WA |
| Westphal & Company | Madison, WI |
| Huen Electric | Broadview, IL |
| Brint Electric | Toledo, OH |
| Bodine Electric of Decatur | Decatur, IL |
| American Electric | Honolulu, HI |
| Sprig Electric | San Ramon, CA |
| North Kansas City Electric Company | Kearney, MO |
| Cupertino Electric | San Francisco, CA |
| RBI Group | Georgetown, ON, Canada |
| E.S. Fox Ltd | Niagara Falls, ON, Canada |
| Battaglia Electric | New Castle, DE |
| ERMCO Inc | Indianapolis, IN |
| Long Electric Company | Indianapolis, IN |
| M & M Electric Inc | Staten Island, NY |
| Del Monte Electric Co Inc | Dublin, CA |
| Miller Electric Company | Jacksonville, FL |
| Enerfab Inc | Cincinnati, OH |
| ATEC Electric Contractors | Lebanon, IN |
| Schmidt Electric | Lakeway, TX |
| Light House Electric Inc | Seattle, WA |
| Veca Electric Inc | Seattle, WA |
| Con. J. Franke Electric | Stockton, CA |
| Titan Electrical | Seattle, WA |
| Townsend Controls & Electrical Inc | Pasco, WA |
| American Electric | Richland, WA |
| M.J. Electric | Iron Mountain, MI |
| Tri-City Electric Co Inc | Miami, FL |
| S & T Group | Saulte Ste. Marie, ON, Canada |
| Block Electric Inc | Niles, IL |
| Singleton Electric Company | Gaithersburg, MD |
| Mott Electric Group | Burnaby, BC, Canada |
| Houle Electric Ltd | Burnaby, BC, Canada |
| Faith Technologies | Menasha, WI |
| Nucero Electric | Philadelphia, PA |
| Ace Electric Ltd | Allentown, PA |
| Eckardt Electric | Chamblee, GA |
| Pierce Electric | Vallejo, CA |
| State Group Inc | Mississauga, ON, Canada |
| Urban Electrical Contractor | Concord, ON, Canada |
| Ampere Ltd | Toronto, ON, Canada |
| Vanalt Electrical Construction | Haddonfield, NJ |
| Whitemarsh Electric | Conshohocken, PA |
| Division 16 Electric | Ottawa, ON, Canada |
| Shea Electric | Oshkosh, WI |
| Birnie Electric Ltd | Mississauga, ON, Canada |
| Transtar Electric Corporation | Toledo, OH |
| Bergeron Electric | Cornell, OH |
| Status Electric | Abbotsford, BC, Canada |
| Danal Electric | Portland, OR |
Mechanical Contractors
| C.G. Mechanical Inc | Woburn, MA |
| Modern Niagara Toronto Inc | Toronto, ON, Canada |
| Vision Mechanical | Pueblo, CO |
| Hayes Mechanical | Chicago, IL |
| Xcel Mechanical Systems | Gardena, CA |
| Broadway Mechanical Contractors | Oakland, CA |
| Derksen Mechanical Services Inc | Winnipeg, MB, Canada |
| Bison Mechanical | Winnipeg, MB, Canada |
| East Side Ventilation | Winnipeg, MB, Canada |
| Trautman & Shreve | Denver, CO |
| Beaulieu Plumbing & Mechanical | Edmundston, NB, Canada |
| C.G. Plumbing & Heating | Ottawa, ON, Canada |
| ACCO Engineered Systems | San Fracisco, CA |
| Urban Mechanical Contracting | Toronto, ON, Canada |
| George A. Kelson Co | Newmarket, ON, Canada |
| Victoria Air Conditioning | Victoria, TX |
| Heating & Plumbing Engineers | Colorado Springs, CO |
| ACE Plumbing | Saskatoon, SK, Canada |
| Pro-Western Mechanical | Saskatoon, SK, Canada |
| L.J. Barton Mechanical Inc | Ancaster, ON, Canada |
| General Heating & Air Conditioning | Madison, WI |
General Contractors
| Kelly Construction | Decatur, IL |
| The Boldt Company | Appleton, WI |
| Bechtel Corporation | Frederick, MD |
| The Boldt Company | Sacramento, CA |
| Veleron Construction | Kitchener, ON, Canada |
| Trumble Construction | Napa, CA |
| J.P. Cullen & Sons | Janesville, WI |
| W.E. O’Neil | Chicago, IL |
Boilermakers
| National Association of Construction Boilermakers | Geneva, IL |
| Williams Industrial Service Group | Tucker, GA |
| The Superior Group | Columbus, OH |
Universities
| New York Institute of Technology | New York, NY |
| Mesa State College Library | Grand Junction, CO |
| South Dakota School of Mines and Technology | Rapid City, SD |
| Temple University | Philadelphia, PA |
| University of Texas at Austin | Austin, TX |
| University of Wisconsin-Madison Library | Madison, WI |
Owners & Other Companies
| American Transmission Company | North York, ON, Canada |
| Avant Garde Construction and Management | Saint John, NB, Canada |
| Electrical Contractors Association of Central Ontario | Kitchener, ON, Canada |
| Randall & Bennett | Portland, ME |
| Aker Construction Inc | Canonsburg, PA |
| Chandler House Moving & Lifting | Bossier City, LA |
| H.J. Martin & Son Inc | Green Bay, WI |
| Turtle & Hughes | Bridgewater, NJ |
| ARB Inc | Upland, CA |
| ARB Inc | Fullerton, CA |
| ARB Inc | El Centro, CA |
| NECA – Puget Sound Chapter | Seattle, WA |
| CBT Manufacturing Co | Chattanooga, TN |
| The Jamar Companies | Duluth, MN |
| RPS Composite LLC | Dayton, OH |
| NECA – Boston Chapter | Newton, MA |
| Power Utilities Contractors | Whitefish Bay, ON, Canada |
| National Steel Constructors LLC | Plymouth, MI |
| Piping & Equipment Inc | Wichita, KS |
| Laird Contractors | Sudbury, ON, Canada |
| Industrial Contractors Inc | Owensboro, KY |
| Bethany Technologies Company | Leroy, NY |
| Yankee Book Peddler Inc | Contoocook, NH |
| The Book House Inc | Jonesville, MI |
| Brunswick Sheet Metal | Dieppe, NB, Canada |
| NAES Power Contractors | Hillsboro, OH |
| Typhan Metal Products | Tempe, AZ |
| S & T Group | Sault Ste. Marie, ON, Canada |
| PBW High Voltage | Brampton, ON, Canada |
| Holaco Installations Ltd | Hamilton, ON, Canada |
| GEXPRO Electrical Supplies | Union City, CA |
| Mechanical Contractors | Springfield, NJ |
| MCA of Western Washington | Seattle, WA |
| CMCEF | Ottawa, ON, Canada |
| Revay & Associates | Westmount, QC, Canada |
| Con. J Franke Electric Inc | Stockton, CA |
| S & R Mechanical | Ottawa, ON, Canada |
| ABCO Supply | Winnipeg, MB, Canada |
| Clouthe Construction | Pembroke, ON, Canada |
| MCA of Kitchener and Waterloo | Waterloo, ON, Canada |
| Black & McDonald | Scarborough, ON, Canada |
| The Ottawa Construction Association | Ottawa, ON, Canada |
| NAC Contractors Ltd | Moriston, ON, Canada |
| Black & McDonald | Scarborough, ON, Canada |
| Alterman Management Group Inc | San Antonio, TX |
| Kenadian Contracting | Nanoose Bay, BC, Canada |
| Yankee Book Peddler Inc | Contoocook, NH |