Licensed General Engineering (A) contractors in California
The California Contractors State License Board (CSLB) lists 15,127 California contractors classified A (General Engineering (A)). Each entry below links to a full dossier with license status, insurance, bond, and enforcement — as of October 14, 2026.
Showing 9,601–9,660 of 15,127 contractors
- Active · clearO'grady Paving INCMt View, CA · CSLB #201696 · as of October 14, 2026
- Active · clearOg SuppressionBenicia, CA · CSLB #453997 · as of October 14, 2026
- Active · clearOhana Construction Engineering INCClovis, CA · CSLB #1077275 · as of October 14, 2026
- Active · clearScott O'hara Construction INCMartinez, CA · CSLB #731509 · as of October 14, 2026
- Active · clearOhio Liberty Maintenance INCYoungstown, CA · CSLB #849381 · as of October 14, 2026
- Active · clearOhla USA INCIrvine, CA · CSLB #984140 · as of October 14, 2026
- Active · clearOhno Construction Company LLCSeattle, CA · CSLB #833470 · as of October 14, 2026
- Active · clearOhr EnergyEl Segundo, CA · CSLB #212038 · as of October 14, 2026
- Active · clearOhson CompanyLa Habra Heights, CA · CSLB #973638 · as of October 14, 2026
- Active · clearOibi IncorporatedSouthlake, CA · CSLB #1076092 · as of October 14, 2026
- Active · clearOjai Contracting Group INCOak View, CA · CSLB #963119 · as of October 14, 2026
- Active · clearO J Construction And Backhoe Service INCSan Marcos, CA · CSLB #478248 · as of October 14, 2026
- Active · clearTanner O'kane RichardsCarpinteria, CA · CSLB #1008016 · as of October 14, 2026
- Active · clearOk Construction & Remodeling INCPoway, CA · CSLB #1046947 · as of October 14, 2026
- Active · clearOkerenson CorporationIrvine, CA · CSLB #716465 · as of October 14, 2026
- Active · clearOlcese ConstructionCarson City, CA · CSLB #770498 · as of October 14, 2026
- Active · clearOldcastle Infrastructure INCAtlanta, CA · CSLB #891107 · as of October 14, 2026
- Active · clearO L Development INCSun Valley, CA · CSLB #870164 · as of October 14, 2026
- Active · clearOld La Honda General EngineeringLa Honda, CA · CSLB #1014495 · as of October 14, 2026
- Active · clearOld West Energy Services INCGreeley, CA · CSLB #1106278 · as of October 14, 2026
- Active · clearOlea EngFresno, CA · CSLB #924114 · as of October 14, 2026
- Active · clearOlenders Excavating INCWeimar, CA · CSLB #876178 · as of October 14, 2026
- Active · clearOliva Construction & Engineering INCWhittier, CA · CSLB #1151300 · as of October 14, 2026
- Active · clearOlivaz ConstructionSanta Ana, CA · CSLB #1152629 · as of October 14, 2026
- Active · clearOlive BranchUpland, CA · CSLB #907556 · as of October 14, 2026
- Active · clearOller ConstructionModesto, CA · CSLB #780327 · as of October 14, 2026
- Active · clearOlra EngineeringS San Francisco, CA · CSLB #1003787 · as of October 14, 2026
- Active · clearOlsen-beal AssociatesLindon, CA · CSLB #582456 · as of October 14, 2026
- Active · clearOlsen Investments INC DBA Olsen Excavation & GradingSonora, CA · CSLB #565297 · as of October 14, 2026
- Active · clearH C Olsen Construction Company INCMonrovia, CA · CSLB #177029 · as of October 14, 2026
- Active · clearDaniel D Olsen DBA Olsen Paving & SealcoatingStateline, CA · CSLB #408888 · as of October 14, 2026
- Active · clearOlson And CO SteelSan Leandro, CA · CSLB #453003 · as of October 14, 2026
- Active · clearOlson Construction CompanySan Diego, CA · CSLB #940995 · as of October 14, 2026
- Active · clearOlson Precast CompanyLas Vegas, CA · CSLB #751277 · as of October 14, 2026
- Active · clearT J OlsonAmerican Canyon, CA · CSLB #1077997 · as of October 14, 2026
- Active · clearOlsson Construction INCOrange, CA · CSLB #758748 · as of October 14, 2026
- Active · clearOltmans Construction COWhittier, CA · CSLB #86393 · as of October 14, 2026
- Active · clearOlympic Land-construction INCSacramento, CA · CSLB #424828 · as of October 14, 2026
- Active · clearOlympos Construction INCSimi Valley, CA · CSLB #940910 · as of October 14, 2026
- Active · clearOmega Contractors INCNorth Hollywood, CA · CSLB #1026633 · as of October 14, 2026
- Active · clearOmega Industrial MarineChula Vista, CA · CSLB #769854 · as of October 14, 2026
- Active · clearOmega Technical Services INCClaremont, CA · CSLB #992334 · as of October 14, 2026
- Active · clearO & M IndustriesArcata, CA · CSLB #284930 · as of October 14, 2026
- Active · clearOmnia Engineering CO LLCWest Hills, CA · CSLB #1155284 · as of October 14, 2026
- Active · clearOmni Energy Solutions INCVacaville, CA · CSLB #1058789 · as of October 14, 2026
- Active · clearOmni UndergroundClovis, CA · CSLB #1036288 · as of October 14, 2026
- Active · clearEddy Dean Monce DBA Onesource San DiegoSan Diego, CA · CSLB #406797 · as of October 14, 2026
- Active · clearOn Demand Contractors INCLa Palma, CA · CSLB #1072595 · as of October 14, 2026
- Active · clearOne Engineering GroupBrea, CA · CSLB #1150181 · as of October 14, 2026
- Active · clearOne Hat Construction INCSan Diego, CA · CSLB #1061807 · as of October 14, 2026
- Active · clearO'neil Engineering INCBurlingame, CA · CSLB #1142594 · as of October 14, 2026
- Active · clearJ W O'neil Construction INCTemecula, CA · CSLB #1116026 · as of October 14, 2026
- Active · clearO'neill Electric INCDuarte, CA · CSLB #1037240 · as of October 14, 2026
- Active · clearM Kevin O'neill Construction Company INCChula Vista, CA · CSLB #377869 · as of October 14, 2026
- Active · clearW E O'neil Construction CO Of CaliforniaEl Segundo, CA · CSLB #494031 · as of October 14, 2026
- Active · clearO Nelson & Son INCWoodside, CA · CSLB #307071 · as of October 14, 2026
- Active · clearOne Stop INCGilroy, CA · CSLB #788324 · as of October 14, 2026
- Active · clearOne Tractor Doze It All INCWildomar, CA · CSLB #800060 · as of October 14, 2026
- Active · clearOne Way Development & Construction Company INCRedding, CA · CSLB #654576 · as of October 14, 2026
- Active · clearOn Grade General Engineering INCSanta Rosa, CA · CSLB #1049929 · as of October 14, 2026
Data sourced from the California Contractors State License Board (CSLB), current as of October 14, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.