| 1st Light Sales Corp | Justin Kenneth Krum | — | (209) 456 5415 | Electricians | Manteca · San Joaquin County | — | — |
| 3 B Construction INC | Jason Allan Burden | — | (209) 601 6716 | Electricians | Manteca · San Joaquin County | — | — |
| 3 Phaze Electric | Thomas Oc | — | (408) 591 5545 | Electricians | Manteca · San Joaquin County | — | — |
| 3Z Electric | Brian Matthew Zumwalt | — | (209) 608 7040 | Electricians | Tracy · San Joaquin County | — | — |
| A & A Electric | Paul Eugene Agans | — | (209) 333 9306 | Electricians | Acampo · San Joaquin County | — | — |
| A - 1 Electrical Contractor INC | Sukhveer Singh | — | (916) 717 5968 | Electricians | Mountain House · San Joaquin County | — | — |
| A Plus Electrical | Steven Viet Lieu | — | (408) 207 3817 | Electricians | Tracy · San Joaquin County | — | — |
| A S A P Electric | Rick Daryl Carlson | archie@asapelectric.com | (209) 339 1417 | Electricians | Stockton · San Joaquin County | — | — |
| A S Electric | Aaron David Stroud | — | (209) 810 6530 | Electricians | Lodi · San Joaquin County | — | — |
| Absolute Electric | David Michael Harmon | — | (209) 305 8866 | Electricians | Tracy · San Joaquin County | — | — |
| Absolute Electrical INC | David Michael Harmon | office@absoluteelectrical.com | (209) 305 8866 | Electricians | Tracy · San Joaquin County | — | — |
| Ac/dc Electric 209 | Garza Carlos | — | (209) 751 6292 | Electricians | Stockton · San Joaquin County | — | — |
| Ac/dc Electrical Contractors INC | John Rudolph-bern Muller | — | (209) 832 1212 | Electricians | Stockton · San Joaquin County | — | — |
| Ace Electric Motor & Pump Co | John Thomas Jr Johnson | — | (209) 464 6428 | Electricians | Stockton · San Joaquin County | — | — |
| Action Electric | John Howard Valtierra | — | (209) 942 0170 | Electricians | Stockton · San Joaquin County | — | — |
| Ak Electrical | Muhammad Azhar Khan | — | (209) 646 5531 | Electricians | Stockton · San Joaquin County | — | — |
| Akin Electric LLC | Adam Wesley Akin | — | (916) 501 9656 | Electricians | Woodbridge · San Joaquin County | — | — |
| Al Kramp Specialties | Al Kramp Specialties | — | (209) 601 9964 | Electricians | Stockton · San Joaquin County | — | — |
| Alamo Alarm Co INC | Paul Douglas Alamo | info@alamoalarm.com | (209) 369 7749 | Electricians | Woodbridge · San Joaquin County | — | — |
| Alberto Rodriguez Electrical Contractor | Rodriguez Alberto | — | (408) 931 0579 | Electricians | Lathrop · San Joaquin County | — | — |
| Alejo Electric INC | Edwin Johnathon Alejo | — | (209) 513 6165 | Electricians | Stockton · San Joaquin County | — | — |
| All Powered INC | Matthew Ray Meyer | — | (209) 996 1905 | Electricians | Stockton · San Joaquin County | — | — |
| All Time Electric | Steve Joseph Iii Bosrock | — | (925) 325 6720 | Electricians | Tracy · San Joaquin County | — | — |
| Alpine Electric | Dannie Albert Silva | — | (209) 570 1993 | Electricians | Victor · San Joaquin County | — | — |
| Alrob Building Services | John Robert Galbraith | — | (510) 908 5305 | Electricians | Stockton · San Joaquin County | — | — |
| Altamont Electric INC | Javier Giovanni Galvan | ycharitou@altamontelectric.com | (209) 855 1847 | Electricians | Tracy · San Joaquin County | — | — |
| Altamont Fire Protection LLC | Aaron Jason Juarez | operations@premierfire.org | (925) 281 5100 | Electricians | Manteca · San Joaquin County | — | — |
| Alternativa Electrical Services | Romero Franklin | anapbm@gmail.com | (510) 386 7582 | Electricians | Manteca · San Joaquin County | — | — |
| American Engineering Contractors INC DBA Budget Electric | Brenda Ann Schmalz | — | (209) 832 2388 | Electricians | Tracy · San Joaquin County | — | — |
| American Power & Communications | Dustin Aaron Wortham | — | (209) 833 1369 | Electricians | Tracy · San Joaquin County | — | — |
| Amonett Construction Company | Jonathan Leo Amonett | — | (408) 601 9208 | Electricians | Tracy · San Joaquin County | — | — |
| Amp Electric | Anthony Michael Prichard | — | (925) 339 6440 | Electricians | Tracy · San Joaquin County | — | — |
| Amp Range Electric | Mario Jr Fonseca Sanchez | — | (209) 687 4490 | Electricians | Stockton · San Joaquin County | — | — |
| Ampwrx | Michael David Favero | info@ampwrx.com | (866) 267 9791 | Electricians | Lodi · San Joaquin County | — | — |
| Anaya Electric | Andrew Jr Anaya | — | (209) 814 5253 | Electricians | Tracy · San Joaquin County | — | — |
| Andrew Thompson Electric | Andrew Charles Thompson | — | (510) 390 6417 | Electricians | Stockton · San Joaquin County | — | — |
| Angel's Electric Contractor | Miguel Angel | — | (408) 768 9901 | Electricians | Tracy · San Joaquin County | — | — |
| Angler Electric | Matthew David Feaver | — | (209) 351 4923 | Electricians | Linden · San Joaquin County | — | — |
| Anthony Chinchiolo | Anthony Chinchiolo | — | (209) 609 2299 | Electricians | Stockton · San Joaquin County | — | — |
| Anthony Johnstad DBA A J Construction | Anthony Joseph Johnstad | — | (209) 838 8262 | Electricians | Escalon · San Joaquin County | — | — |