| 153 Cornerstone Construction INC | Il-Lae Cho | gwebb@cornerstone-construction.com | (832) 259-2520 | Electricians | Fremont · Alameda County | — | — |
| 1P Electric | Juan Pablo Zamora Garcia | contact@1pelectric.com | (510) 826 6905 | Electricians | Hayward · Alameda County | — | — |
| 1st Class Electric | Javier Percy Alejos | — | (510) 305 8376 | Electricians | San Leandro · Alameda County | — | — |
| 361 Construction INC | Sasa Saratlija | — | (415) 881 8787 | Electricians | Oakland · Alameda County | — | — |
| 808-electric LLC | Ross Belden Flores | — | (510) 565 0216 | Electricians | Fremont · Alameda County | — | — |
| A & A City Electric INC | Jose Maximiliano Jr Paredes | — | (415) 314 5251 | Electricians | Hayward · Alameda County | — | — |
| A - Tron Electric INC | Abner Abisai Alvarez Castillo | — | (415) 847 0314 | Electricians | Dublin · Alameda County | — | — |
| A A E Group Construction Corp | Ahmad Ali Eslami | — | (510) 774 8387 | Electricians | Berkeley · Alameda County | — | — |
| A A Electric | Ashween Ashnil Prasad | — | (650) 834 2603 | Electricians | Hayward · Alameda County | — | — |
| A B C Construction | Xuan Van Le | — | (510) 499 2660 | Electricians | San Lorenzo · Alameda County | — | — |
| A B T Electric | Mease Buthan | — | (510) 489 3477 | Electricians | Hayward · Alameda County | — | — |
| A C C Electric Co | Albert Sung Chiu | — | (510) 748 1298 | Electricians | Alameda · Alameda County | — | — |
| A C E Electric Co | Shaun Arthur Allen | — | (925) 606 8610 | Electricians | Livermore · Alameda County | — | — |
| A C P Electric | Anthony Carlo Pagano | — | (510) 701 6458 | Electricians | San Leandro · Alameda County | — | — |
| A G - Comm Co | Togtokh Tumurbaatar | info@agcomm.com | (510) 375 1435 | Electricians | Berkeley · Alameda County | — | — |
| A L Electric INC | Vergara Alejandro Lopez | — | (415) 350 5415 | Electricians | San Lorenzo · Alameda County | — | — |
| A M Z Electric | Zadoor Massis | — | (925) 216 8894 | Electricians | Livermore · Alameda County | — | — |
| A P C Construction | Alex Pui-kei Chiu | — | (510) 388 6015 | Electricians | Castro Valley · Alameda County | — | — |
| A Quality Plumbing & Electric INC | Brian Thomas Johnson | — | (925) 449 0891 | Electricians | Livermore · Alameda County | — | — |
| A Rodriguez Electric | Alen Naun Rodriguez Flores | — | (415) 910 8529 | Electricians | Hayward · Alameda County | — | — |
| A T M Construction | Ali Asghar Toraby-moghadam | — | (510) 435 5900 | Electricians | Berkeley · Alameda County | — | — |
| A V Electrical Solutions | Josue Salvador Alcantar | info@avelectricalsolutions.com | (619) 928 7092 | Electricians | San Leandro · Alameda County | — | — |
| A W Construction INC | Antoney Lap Wong | — | (510) 381 9963 | Electricians | Oakland · Alameda County | — | — |
| A Wire | A Wire | — | (510) 333 6756 | Electricians | Oakland · Alameda County | — | — |
| A&e Electrical Company INC | Steven Anthony Sievers | — | (650) 593 9111 | Electricians | Hayward · Alameda County | — | — |
| A-1 Electrical Services | Jeffrey Lee Moita | info@aelectricalservices.com | (510) 701 0240 | Electricians | Alameda · Alameda County | — | — |
| A-1 Modular INC | Jose Salvador Ramirez | marketing@a-modular.com | (510) 999 7721 | Electricians | San Leandro · Alameda County | — | — |
| A-1 Services Electrical - Stucco | Jose Mauricio Diaz | — | (510) 274 3060 | Electricians | Hayward · Alameda County | — | — |
| A-z Commercial And Residential Electrical | Cilliers Barry | — | (510) 917 1192 | Electricians | Hayward · Alameda County | — | — |
| Aaaa Generator Services INC | Michael Bernard Chiasson | — | (888) 664 2436 | Electricians | Hayward · Alameda County | — | — |
| Aaron Cruz Electric | Cruz Aaron | — | (415) 205 4440 | Electricians | Oakland · Alameda County | — | — |
| Aaron Murphy Electric | Aaron Eugene Murphy | — | (650) 704 8797 | Electricians | Hayward · Alameda County | — | — |
| Abc Dano Electrical Services | Daniel Stephen Mitchum | — | (510) 815 1070 | Electricians | Livermore · Alameda County | — | — |
| Abercrombie Electric | Larry Del Abercrombie | — | (925) 339 0680 | Electricians | Livermore · Alameda County | — | — |
| Abigail Energy Group LLC | Victor Manuel Munoz | — | (925) 397 4669 | Electricians | Livermore · Alameda County | — | — |
| Abinesh's Electric | Nand Abinesh | — | (510) 331 5546 | Electricians | Hayward · Alameda County | — | — |
| Abram's Electric INC | Kenneth Perry Green | — | (510) 205 3623 | Electricians | Oakland · Alameda County | — | — |
| AC Electrical LLC | Anthony Charles Ward Cranswick | — | (415) 996 5678 | Electricians | San Leandro · Alameda County | — | — |
| Accel Electric | Francisco Rodriguez Aguilera | accel@accelelectric.com | (510) 377 8157 | Electricians | Castro Valley · Alameda County | — | — |
| Ace Electric | Cesar Antonio Swaby | — | (510) 368 4047 | Electricians | Oakland · Alameda County | — | — |