Senior Estimator - Industrial Piping & Mechanical EPC

Quanta Services, Inc.; Channelview (TX); On-site; USD 85,000 - 120,000; Full time

Benefits offered by this job

401(k) with immediate matching

Comprehensive benefits packages

Short/Long-term benefits

Employee discounts

Job summary

NorthStar Energy Services, a Quanta Services, Inc. company, seeks an experienced Senior Estimator to join our Channelview, TX office.

The role supports estimating for oil & gas midstream/downstream projects with emphasis on mechanical, piping, civil, and structural scopes. The Senior Estimator will develop accurate cost estimates for EPC and design-build projects, interpret complex drawings, and collaborate with project teams to validate assumptions and strategies.

Qualifications

• Bachelor’s degree (or 10+ years in lieu of degree) in Construction Management, Engineering, or related field.
• 10+ years of estimating experience in industrial construction, with focus on mechanical/piping.
• Proven experience estimating midstream and downstream Oil & Gas projects (terminals, plants, pipelines, facilities).
• Strong knowledge of civil and structural construction methods and cost drivers.
• Advanced proficiency with Trimble Accubid and Microsoft Excel.
• Ability to interpret P&IDs, isometrics, civil drawings, and structural plans.
• Experience supporting EPC or design-build project delivery models preferred.

Responsibilities

• Prepare detailed cost estimates for civil, structural, and mechanical construction scopes, emphasis on piping and mechanical systems.
• Perform quantity takeoffs and develop labor, material, and equipment pricing using Trimble Accubid and Excel.
• Review drawings and scope documents to ensure accurate estimates.
• Collaborate with project teams to validate assumptions and execution strategies.
• Develop pricing for lump sum, unit rate, and time-and-materials proposals.
• Develop construction schedules in Microsoft Project.
• Analyze subcontractor and vendor quotes for alignment with scope and standards.
• Identify project risks, exclusions, and value-engineering opportunities.
• Support bid reviews, reconciliations, and handoff meetings.
• Maintain estimating databases and productivity benchmarks.

Skills

Analytical skills

Organizational skills

Communication skills

Estimating experience

Education

Bachelor’s degree in Construction Management or Engineering

10 years experience in lieu of degree

Tools

Trimble Accubid

Microsoft Excel

Job description

NorthStar Energy Services, a Quanta Services, Inc. company, seeks an experienced Senior Estimator to join our Channelview, TX office.

The role supports estimating for oil & gas midstream/downstream projects with emphasis on mechanical, piping, civil, and structural scopes. The Senior Estimator will develop accurate cost estimates for EPC and design-build projects, interpret complex drawings, and collaborate with project teams to validate assumptions and strategies.