| Aaa Network Solutions, Inc. | Rancho Cucamonga | CA | $0 |
| Aaken Corp. | Bend | OR | Subcontractor |
| Abbott Electric Inc. | Canton | OH | $0 |
| Abe Fran, LLC | West Nyack | NY | Subcontractor |
| Able Communications, Inc. | Grand Prairie | TX | Subcontractor |
| Able Electric Inc. | Hilo | HI | $0 |
| A B Mer Construction Corp. | Dededo | GU | Subcontractor |
| Absolute Solutions, Inc. | Cheyenne | WY | $0 |
| Accent Electrical Services Corporation | Broomfield | CO | $0 |
| Accent Electronics | El Cajon | CA | Subcontractor |
| Access Hardware Inc. | Kahului | HI | Subcontractor |
| Accurate Electrical Connection Inc. | Orlando | FL | $0 |
| Ac DC Inc. | Laredo | TX | Subcontractor |
| Ace Electrical Contractors Inc. | Minneapolis | MN | $0 |
| Ace Electric, Inc. | Poway | CA | Subcontractor |
| Ac Electric Service Inc. | Chalmette | LA | $0 |
| Ace Technologies LLC | Hahira | GA | Subcontractor |
| Acker Electric Company Inc. | Anniston | AL | Subcontractor |
| Acp, LLC | Lafayette | LA | Subcontractor |
| Acs Controls Corp. | North Highlands | CA | $0 |
| Act General Building Construction Inc. | Ocala | FL | $0 |
| Action Contracting & Electrical Co. LLC | Bear Creek Township | PA | Subcontractor |
| Action Electric Co. Inc. | Atlanta | GA | $0 |
| Action Systems, Inc. | Sioux Falls | SD | Subcontractor |
| Ada Station Communication, Inc. | Crossville | TN | Subcontractor |
| Adcocks Systems LLC | Waldorf | MD | $0 |
| Adm Integrated Group, Inc. | Manalapan | NJ | $0 |
| Advanced Automated Systems, Inc. | Anaheim | CA | $0 |
| Advanced Communications Incorporated | Michigan City | IN | $0 |
| Advanced Connections, Inc. | Carrollton | TX | $0 |
| Advanced Data & Fiber Professionals Inc. | Palmer | AK | Subcontractor |
| Advanced Electrical Installations, Inc. | Titusville | FL | Subcontractor |
| Advanced Electrical Services, Inc. | Iowa City | IA | $0 |
| Advanced Electric Inc. | Vancouver | WA | $0 |
| Advanced Home LLC | Panama City Beach | FL | $0 |
| Advanced Lighting, Inc. | Salt Lake City | UT | $0 |
| Advanced Lighting Services, Inc. | Henderson | NV | $0 |
| Advanced Network & Computer Services, Inc. | Coto Laurel | PR | $0 |
| Advantage Electric, Inc. | Jamestown | ND | $0 |
| Aei Electric LLC | Richland | WA | Subcontractor |
| Aey Electric Inc. | Youngstown | OH | Subcontractor |
| A.g. Electrical Contractors, Inc. | Edison | NJ | $0 |
| A & G Electric, LLC | Mechanicsville | MD | Subcontractor |
| Ag Power & Construction LLC | District Heights | MD | Subcontractor |
| Ahearn Electric, Inc. | Bremerton | WA | Subcontractor |
| Aiken-harper Electrical Services, Inc. | Pooler | GA | $0 |
| A. J. Labourdette, Inc. | Harahan | LA | Subcontractor |
| Alarm & Control System Co. Inc. | San Juan | PR | Subcontractor |
| Alaska DTS LLC | Wasilla | AK | Subcontractor |
| Alason Electrical Contractors Inc. | Millersville | MD | Subcontractor |
| Aldon Electric, Inc. | East Weymouth | MA | $0 |
| Aleshire Electric Inc. | Mena | AR | $0 |
| Allan Briteway Electrical Utility Contractors, Inc. | Florham Park | NJ | $0 |
| All-brite Electric, Inc. | West Haven | CT | $0 |
| Allegheny City Electric Inc. | Pittsburgh | PA | Subcontractor |
| Allegiant Electric LLC | Las Vegas | NV | $0 |
| Allen E Smith | Anchorage | AK | $0 |
| Allied Electrical Construction, LLC | Pocatello | ID | $0 |
| Allied Electric Corporation | Columbia Falls | MT | Subcontractor |
| Allison-smith Company, LLC (delaware) | Smyrna | GA | $0 |
| Alloway Electric Co. Inc. | Boise | ID | $0 |
| All Purpose Communications, LLC | Harahan | LA | $0 |
| All Purpose Erectors, Inc. | Lebanon | IL | $0 |
| Allsouth Electrical LLC | North Charleston | SC | Subcontractor |
| All-south Electric, Inc. | Long Beach | MS | $0 |
| All Star Communications, Inc. | Laurel | MD | $0 |
| All Star Electric Inc.Saint Rose, LA · UEI ENB5JK15J671 | Saint Rose | LA | Subcontractor |
| All Star Electric Inc.San Antonio, TX · UEI UTZMQE2KQ9J1 | San Antonio | TX | Subcontractor |
| Alltech Communications Inc. | Topeka | KS | $0 |
| Alltronics Integrated Systems, Inc. | El Paso | TX | Subcontractor |
| All West Communications, Inc. | Kamas | UT | $0 |
| Almoayyed Air Conditioning W.L.L. | Manama | | Subcontractor |
| Alpha Craft Technologies, LLC | South Boston | VA | Subcontractor |
| Alpha Electric, Inc. | South Burlington | VT | $0 |
| Alpine Electric, Inc. | Mansfield | OH | $0 |
| Alrich Electric Contracting Co. Inc. | Martinez | GA | Subcontractor |
| Altec Electrical Corp. | Point Pleasant Boro | NJ | $0 |
| Alternative Energy Services, Inc. | Titusville | FL | Subcontractor |
| Amat Inc. | Ashland | VA | $0 |
| Amenitek, Inc. | Lanesboro | MA | Subcontractor |
| American Datapath Inc. | Englewood | CO | Subcontractor |
| American Eagle Electric Co. Inc. | Newburgh | NY | Subcontractor |
| American Electric Co. LLC | Mililani | HI | Subcontractor |
| American Electric Inc. | Kalispell | MT | $0 |
| American Opti-net, Inc. | Oklahoma City | OK | $0 |
| American Sound Masking LLC | Columbus | OH | $0 |
| American Tele-connect Services Inc. | Warwick | RI | $0 |
| Amex Electric Services Dallas Ft Worth Inc. | Dallas | TX | $0 |
| Amp Companies, Inc. | Galesburg | IL | $0 |
| Amteck, LLC | Lexington | KY | Subcontractor |
| Anchor Electric Contracting Corporation | Missoula | MT | $0 |
| Anderson Brothers Electric LLC | Juneau | AK | Subcontractor |
| Anderson Electric Inc. | Springfield | IL | $0 |
| Anderson & Howard Electric Inc. | Irvine | CA | $0 |
| A & N Electric, Inc. | Tecumseh | MI | Subcontractor |
| Angel Advanced Technologies, LLC | Point Harbor | NC | $0 |
| Angel Electric, LLC | Powder Springs | GA | $0 |
| Angiel Electrical Construction Corporation | Dallas | TX | $0 |
| Annese Electrical Service, Inc. | East Weymouth | MA | $0 |
| A & P Electrical Service, Inc. | Youngsville | LA | $0 |
