| 1 Superior Electric INC | Rick Daniel Sullivan | info@superior-electric.com | (949) 933 2749 | Electricians | Newport Beach · Orange County | — | — |
| 100X Construction | Paul Mehrshahi | — | (818) 334 9232 | Electricians | Irvine · Orange County | — | — |
| 11B Renewables INC | Otto Ivan Pena | — | (213) 479 5960 | Electricians | Fullerton · Orange County | — | — |
| 1503 Electric INC | Jesus Cirigo Morin | — | (714) 200 9107 | Electricians | Tustin · Orange County | — | — |
| 1st Choice Design & Development | Tony Gene Holder | — | (844) 292 3700 | Electricians | Orange · Orange County | — | — |
| 1st Place Electric Company INC | Mark Gregory Smith | mark@1stplaceelectric.com | (949) 430-7001 | Electricians | San Juan Capistrano · Orange County | — | — |
| 1st Team All Electrical | Victor Manuel Salazar | — | (323) 346 7908 | Electricians | Anaheim · Orange County | — | — |
| 1st Touch Electric INC | Franklin Andres Martinez Zambrano | fmartinez@1sttouchelectric.com | (714) 865 0430 | Electricians | Anaheim · Orange County | — | — |
| 2 Ground Electric | Gabriel Mckinley Fitch | — | (949) 382 6292 | Electricians | Irvine · Orange County | — | — |
| 24 Security Fire Alarm & Electric | Jea Chun Shin | — | (213) 216 2889 | Electricians | Irvine · Orange County | — | — |
| 360 Electricity LLC | James Ezra Bauer | — | (949) 847 8876 | Electricians | Lake Forest · Orange County | — | — |
| 3P Electric | Christian Carl Peterson | — | (760) 889 0388 | Electricians | San Clemente · Orange County | — | — |
| 4G Brothers LLC | Juan Luis Garcia Solano | — | (949) 200 0552 | Electricians | Fullerton · Orange County | — | — |
| 5 Alarm Fire Corporation | Bernadette Rae Merrill | — | (714) 632 8646 | Electricians | Orange · Orange County | — | — |
| 7 Electrical Contractor | Matthew Mark Perez | — | (714) 331 8399 | Electricians | Garden Grove · Orange County | — | — |
| 75 Electric INC | Alonso Rivas | — | (562) 844 2654 | Electricians | Los Alamitos · Orange County | — | — |
| 8pt Electrical Services INC | David Michael Scott | — | (562) 510 0110 | Electricians | Seal Beach · Orange County | — | — |
| A & H Communications INC | Deborah Elaine Betts | — | (949) 250 4555 | Electricians | Irvine · Orange County | — | — |
| A - Plus Maintenance INC | Edil Verzosa Evangelista | — | (949) 632 6028 | Electricians | Costa Mesa · Orange County | — | — |
| A A A Pacific Electric INC | Saeid Mohammad Taghavi | — | (949) 633 2198 | Electricians | Mission Viejo · Orange County | — | — |
| A A Calonestar Electric | Joon Hyun Nam | — | (213) 864 8831 | Electricians | Anaheim · Orange County | — | — |
| A B A Alarm Company INC | Edward Martin Link | — | (800) 444 2542 | Electricians | Huntington Beach · Orange County | — | — |
| A B Electric INC | Brandon William Kersey | — | (562) 522 1358 | Electricians | Yorba Linda · Orange County | — | — |
| A C & R Construction Plumbing & Electrical | Robert Ramirez Salas | — | (714) 602 0001 | Electricians | La Habra · Orange County | — | — |
| A C Pozos Electric Corporation | Anthony Curtis Pozos | — | (714) 546 0366 | Electricians | Costa Mesa · Orange County | — | — |
| A C R Electrical | Brian Hung Nguyen | — | (714) 981 4631 | Electricians | Santa Ana · Orange County | — | — |
| A E I Technologies | Edwin Mark Elder | — | (949) 650 7304 | Electricians | Costa Mesa · Orange County | — | — |
| A E W Electric INC | Arthur Edmund Wolf | — | (949) 291 3386 | Electricians | Ladera Ranch · Orange County | — | — |
| A Electrical | Zazz Anh Nguyen | — | (714) 448 4286 | Electricians | Westminster · Orange County | — | — |
| A G Electric | Guadarrama Abel | — | (714) 805 1163 | Electricians | Santa Ana · Orange County | — | — |
| A I M Electric | Ghazaei Mohammad | — | (310) 294 9100 | Electricians | Orange · Orange County | — | — |
| A I M Fire And Safety | John Jerome Dompke | — | (800) 295 4705 | Electricians | Huntington Beach · Orange County | — | — |
| A J Electric | Nazar Mohamad Al-jamie | — | (714) 390 1477 | Electricians | Tustin · Orange County | — | — |
| A J Kirkwood & Associates INC | Leah Jean Zappia | — | (714) 505 1977 | Electricians | Fullerton · Orange County | — | — |
| A K Best Construction INC | Peter Ki Nam | — | (213) 332 3346 | Electricians | Buena Park · Orange County | — | — |
| A K Electric | Kvesic Ante | — | (714) 726 5819 | Electricians | Fountain Valley · Orange County | — | — |
| A K Electric | Boldizsar Akos | — | (714) 420 5227 | Electricians | Portola Hills · Orange County | — | — |
| A L X Company INC | Hernandez Alexander | — | (949) 637 5907 | Electricians | Costa Mesa · Orange County | — | — |
| A M Electrical | Manafi Attaollah | — | (949) 565 6122 | Electricians | Tustin · Orange County | — | — |
| A M Electrical | Metzger Alexander | — | (714) 931 6980 | Electricians | Lake Forest · Orange County | — | — |