General engineering contractors in Ontario, CA
61 licenses with the A classification list Ontario (San Bernardino County) as their address with the state, 59 of them active. Active licenses with nothing flagged come first.
- Pascal & Ludwig Constructors IncA · B · HAZ · #373525 Ontario · San Bernardino County Active
- Power Grade IncA · C-10 · #935306 Ontario · San Bernardino County Active
- Powerhouse Grading IncA · #909465 Ontario · San Bernardino County Active
- Practicore Solutions IncA · #1146273 Ontario · San Bernardino County Active
- Premier Paving IncA · C-12 · #638301 Ontario · San Bernardino County Active
- Primebore Directional Boring CorpA · C-7 · #847499 Ontario · San Bernardino County Active
- Proffitt Excavating IncA · #952224 Ontario · San Bernardino County Active
- Progressive Fueling Construction IncA · HAZ · #894043 Ontario · San Bernardino County Active
- Robert Alan Construction IncA · C-8 · #1022004 Ontario · San Bernardino County Active
- Rudolf Carl Theilacker ContractorA · B · #279711 Ontario · San Bernardino County Active
- Sitelogiq IncA · B · C-10 · #1054171 Ontario · San Bernardino County Active
- Sm Waterworks Backflow ServiceA · C-36 · C-60 · #1115619 Ontario · San Bernardino County Active
- Spec Construction Co IncA · B · C-4 · C-8 +9 · #419626 Ontario · San Bernardino County Active
- Thacker'S EngineeringA · #1141853 Ontario · San Bernardino County Active
- Turbine Repair Services LLCA · C-10 · #981674 Ontario · San Bernardino County Active
- West Coast Pipeline SpecialistA · C-10 · C-36 · #1129511 Ontario · San Bernardino County Active
- Yacko Construction IncA · B · #1012085 Ontario · San Bernardino County Active
- Delta Group IncA · #1107352 Ontario · San Bernardino County Active Workers' comp suspension pending
- Kormex Construction IncA · C-27 · #1073142 Ontario · San Bernardino County Active Bond claim suspension pending
- Riptide IndustriesA · #1056742 Ontario · San Bernardino County Suspended: bond lapsed
- Rodriguez Brothers Engineering IncA · C-42 · #670969 Ontario · San Bernardino County Suspended: bond lapsed
Source: CSLB license file, Nov 8, 2026All trades in Ontario