Licensed General Engineering (A) contractors in California

The California Contractors State License Board (CSLB) lists 15,265 California contractors classified A (General Engineering (A)). Each entry below links to a full dossier with license status, insurance, bond, and enforcement — as of July 7, 2026.

Showing 9,661–9,720 of 15,265 contractors

O B Construction Builders A1 INC
Palmdale, CA · CSLB #237811 · as of July 7, 2026
Active · clear
Ob Construction & Engineering Corp
National City, CA · CSLB #1114983 · as of July 7, 2026
Active · clear
Obrien Brothers INC
San Bernardino, CA · CSLB #1074479 · as of July 7, 2026
Active · clear
Michael L O'brien
Frazier Park, CA · CSLB #535774 · as of July 7, 2026
Active · clear
Tim O'brien Tractor Work
Fallbrook, CA · CSLB #882100 · as of July 7, 2026
Active · clear
Oc3 Construction & Consulting INC
San Miguel, CA · CSLB #1114486 · as of July 7, 2026
Active · clear
Oc 405 Partners Joint Venture
Irvine, CA · CSLB #1021106 · as of July 7, 2026
Active · clear
Occ Builders
Fountain Valley, CA · CSLB #948162 · as of July 7, 2026
Active · clear
O C & C Construction
Orange, CA · CSLB #915121 · as of July 7, 2026
Active · clear
Occ Engineering
Ridgecrest, CA · CSLB #1045102 · as of July 7, 2026
Active · clear
Ocean Blue Engineers Incorporated
Los Angeles, CA · CSLB #611152 · as of July 7, 2026
Active · clear
Ocean Blue Environmental Services INC
Long Beach, CA · CSLB #709140 · as of July 7, 2026
Active · clear
Ocean Bound Construction
San Diego, CA · CSLB #962471 · as of July 7, 2026
Active · clear
Oc Engineering And Construction INC
Riverside, CA · CSLB #1150010 · as of July 7, 2026
Active · clear
Oc Jones & Sons Bridgeway Civil Constructors A Joint Venture
Berkeley, CA · CSLB #1074653 · as of July 7, 2026
Active · clear
O C Jones & Sons INC
Berkeley, CA · CSLB #759729 · as of July 7, 2026
Active · clear
O C L A Construction
Laguna Niguel, CA · CSLB #1000245 · as of July 7, 2026
Active · clear
O'connell Engineering & Construction INC
Winchester, CA · CSLB #883686 · as of July 7, 2026
Active · clear
O'connor Pipelines INC
San Francisco, CA · CSLB #1056307 · as of July 7, 2026
Active · clear
O'coy & Sons Equipment
Red Bluff, CA · CSLB #793776 · as of July 7, 2026
Active · clear
O C Ramps INC
Santa Ana, CA · CSLB #995047 · as of July 7, 2026
Active · clear
O C Vacuum INC
City Of Industry, CA · CSLB #706710 · as of July 7, 2026
Active · clear
Odell's Pump & Motor
Visalia, CA · CSLB #826935 · as of July 7, 2026
Active · clear
O D I C Environmental
Brea, CA · CSLB #918987 · as of July 7, 2026
Active · clear
Odigos Construction INC
Long Beach, CA · CSLB #1063966 · as of July 7, 2026
Active · clear
Odin
Roseville, CA · CSLB #1087001 · as of July 7, 2026
Active · clear
Odin - Raito JV
Roseville, CA · CSLB #1120973 · as of July 7, 2026
Active · clear
Odin Real Estate Group LLC
Loomis, CA · CSLB #1038866 · as of July 7, 2026
Active · clear
O'donnell Landscape
Carlsbad, CA · CSLB #610470 · as of July 7, 2026
Active · clear
O'donovan Construction INC
Orange, CA · CSLB #903554 · as of July 7, 2026
Active · clear
Od Services LLC
Rialto, CA · CSLB #1107399 · as of July 7, 2026
Active · clear
O'duffy Bros INC
Romoland, CA · CSLB #776934 · as of July 7, 2026
Active · clear
O'duffy Construction
Romoland, CA · CSLB #647025 · as of July 7, 2026
Active · clear
Odyssey Environmental Services INC
Galt, CA · CSLB #774370 · as of July 7, 2026
Active · clear
O E C Energy
Altadena, CA · CSLB #856361 · as of July 7, 2026
Active · clear
Offins General Engineering LLC
Hoopa, CA · CSLB #1088235 · as of July 7, 2026
Active · clear
Offset General Contractor
Willows, CA · CSLB #991692 · as of July 7, 2026
Active · clear
Ofrs, INC
Signal Hill, CA · CSLB #994684 · as of July 7, 2026
Active · clear
O G Construction
Oxnard, CA · CSLB #814951 · as of July 7, 2026
Active · clear
O & G Industries INC
Torrington, CA · CSLB #672077 · as of July 7, 2026
Active · clear
O'grady Paving INC
Mt View, CA · CSLB #201696 · as of July 7, 2026
Active · clear
Og Suppression
Benicia, CA · CSLB #453997 · as of July 7, 2026
Active · clear
Ohana Construction Engineering INC
Clovis, CA · CSLB #1077275 · as of July 7, 2026
Active · clear
Scott O'hara Construction INC
Martinez, CA · CSLB #731509 · as of July 7, 2026
Active · clear
Ohio Liberty Maintenance INC
Youngstown, CA · CSLB #849381 · as of July 7, 2026
Active · clear
Ohla USA INC
Irvine, CA · CSLB #984140 · as of July 7, 2026
Active · clear
Ohno Construction Company
Jurupa Valley, CA · CSLB #833470 · as of July 7, 2026
Active · clear
Ohr Energy
El Segundo, CA · CSLB #212038 · as of July 7, 2026
Active · clear
Ohson Company
La Habra Heights, CA · CSLB #973638 · as of July 7, 2026
Active · clear
Oibi Incorporated
Southlake, CA · CSLB #1076092 · as of July 7, 2026
Active · clear
Ojai Contracting Group INC
Oak View, CA · CSLB #963119 · as of July 7, 2026
Active · clear
O J Construction And Backhoe Service INC
San Marcos, CA · CSLB #478248 · as of July 7, 2026
Active · clear
Oji Califco Consortium INC
Redondo Beach, CA · CSLB #1099251 · as of July 7, 2026
Active · clear
Tanner O'kane Richards
Carpinteria, CA · CSLB #1008016 · as of July 7, 2026
Active · clear
Ok Construction & Remodeling INC
Poway, CA · CSLB #1046947 · as of July 7, 2026
Active · clear
O'kelley Construction Solutions
Ventura, CA · CSLB #1123092 · as of July 7, 2026
Active · clear
Okerenson Corporation
Irvine, CA · CSLB #716465 · as of July 7, 2026
Active · clear
Olcese Construction
Carson City, CA · CSLB #770498 · as of July 7, 2026
Active · clear
Oldcastle Infrastructure INC
Atlanta, CA · CSLB #891107 · as of July 7, 2026
Active · clear
O L Development INC
Sun Valley, CA · CSLB #870164 · as of July 7, 2026
Active · clear

Data sourced from the California Contractors State License Board (CSLB), current as of July 7, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.