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Mechanical Estimator & Preconstruction Jobs in Orange County, CA

HVAC, plumbing and piping estimator and preconstruction openings with commercial and design-build mechanical contractors across Orange County.

Open Preconstruction roles in Orange County

  • Mechanical Preconstruction Sales Engineer - Orange County — Orange County, CA
  • Plumbing Preconstruction Manager - Orange County — Orange County, CA
  • Mechanical Preconstruction Engineer - Orange County — Orange County, CA
  • Preconstruction Manager - Orange County — Orange County, CA

Keep looking in Orange County

  • All open Orange County construction jobs
  • Preconstruction jobs by metro nationwide
  • All open Preconstruction roles

Other trades hiring in Orange County

  • HVAC jobs in Orange County
  • Plumbing jobs in Orange County
  • Piping jobs in Orange County
  • Sheet Metal jobs in Orange County
  • Building Automation jobs in Orange County
  • VDC BIM jobs in Orange County
  • Service Manager jobs in Orange County
  • Refrigeration jobs in Orange County
  • Fire Protection jobs in Orange County

All open roles in Orange County

  • Mechanical Preconstruction Sales Engineer - Orange County — Orange County, CA
  • Mechanical Construction Project Engineer - Orange County — Orange County, CA
  • Building Automation Controls Project Manager - Orange County — Orange County, CA
  • HVAC Commissioning and Startup Technician — Orange County, CA
  • HVAC Service Dispatcher and Customer Service Representative — Orange County, CA
  • Mid to Senior HVAC Service Technician - Orange County — Orange County, CA
  • Tool Room Attendant - Orange County — Orange County, CA
  • Plumbing Preconstruction Manager - Orange County — Orange County, CA
  • Mechanical Preconstruction Engineer - Orange County — Orange County, CA
  • Building Automation Design Engineer - Orange County — Orange County, CA
  • Building Automation Sales Engineer — Orange County, CA
  • Commercial Foodservice Equipment Field Service Technician — Orange County, CA
  • Commercial Mechanical Construction Project Manager - Orange County — Orange County, CA
  • Commercial Mechanical Service Technician — Orange County, CA
  • Controls Project Engineer - Orange County — Orange County, CA
  • Controls Service Sales Engineer - Orange County — Orange County, CA
  • Controls Software Engineer - Orange County — Orange County, CA
  • Detailer — Costa Mesa, CA
  • Electrical Foreman - Orange County — Orange County, CA
  • Electrical Journeyman - Orange County — Orange County, CA
  • Electrical Project Manager - Orange County — Orange County, CA
  • Fabrication Shop Administrative Assistant - Orange County — Orange County, CA
  • Foreperson — Costa Mesa, CA
  • HVAC Estimator — Orange County, CA
  • HVAC Project Engineer — Orange County, CA
  • HVAC Project Manager — Orange County, CA
  • HVAC Sales Engineer - Service Division — Orange County, CA
  • HVAC Service Sales Engineer — Costa Mesa, CA
  • HVAC Service Sales Representative — Orange County, CA
  • HVAC Tenant Improvement Project Manager - Orange County — Orange County, CA
  • Industrial Centrifugal Chiller Technician — Orange County, CA
  • Mechanical Construction Project Manager - Orange County — Orange County, CA
  • Mechanical Project Engineer - Orange County — Orange County, CA
  • Piping Project Manager — Orange County, CA
  • Plumbing Estimator — Orange County, CA
  • Plumbing Project Engineer — Orange County, CA
  • Plumbing Project Manager — Orange County, CA
  • Plumbing Tenant Improvement Project Manager - Orange County — Orange County, CA
  • Plumbing/hvac Assistant Project Manager — Orange County, CA
  • Preconstruction Manager - Orange County — Orange County, CA
  • Process Piping Project Engineer — Orange County, CA
  • Project Engineer — Costa Mesa, CA
  • Project Engineer — Orange County, CA
  • Project Executive — Costa Mesa, CA
  • Project Executive - Process Piping — Costa Mesa, CA
  • Project Manager — Costa Mesa, CA
  • Project Manager - Process Piping — Costa Mesa, CA
  • Retrofit Project Engineer - Orange County — Orange County, CA
  • Sales Engineer — Orange County, CA
  • Senior Project Manager — Costa Mesa, CA
  • Senior Structural Engineer — Costa Mesa, CA
  • Service Project Manager - Orange County — Orange County, CA
  • Service Sales Engineer - Plumbing — Costa Mesa, CA
  • Sr HVAC Design Engineer, PE — Orange County, CA
  • Tenant Improvement Project Engineer - Orange County — Orange County, CA
  • VDC Project Lead - Mechanical — Orange County, CA
  • ALC Service Technician — Orange County, CA
  • BAS / DDC Controls Technician — Orange County, CA

Featured hiring & salary guides

  • HVAC Service Manager Salary by Metro (2026)
  • Mechanical Superintendent Salary Guide (2026)
  • Controls / BAS Project Manager Salary Guide (2026)
  • How to Hire a Piping Superintendent (2026 Playbook)
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