Mechanical Estimator- Process Piping

mullins; Charleston (SC); Hybrid; USD 120,000 - 180,000; Full time

Job summary

Mullins is seeking a Senior Mechanical Estimator for Industrial Process Piping to lead self-performed piping estimates across multiple US regions. You will develop quantity take-offs from P&IDs, isometrics, and layouts, and integrate constructability and risk factors into robust cost models.

The role requires experience with greenfield and brownfield projects, familiarity with Design-Bid-Build, Design-Build, EPC, and risk reviews, and the ability to work effectively in remote or hybrid teams

Qualifications

• Experience estimating self-performed mechanical and piping scopes across multiple US Regions.
• Ability to take-offs from P&IDs, isometrics, layouts and specifications.
• Familiarity with greenfield and brownfield projects and various delivery methods.

Responsibilities

• Lead estimating efforts for self-performed mechanical piping scopes.
• Develop detailed labor and material cost models with risk allowances.
• Coordinate with operations, project management, engineering, and procurement teams.

Skills

Self-performed piping

Piping take-off

Estimating systems

Remote/hybrid collaboration

Tools

Trimble Autobid

Bluebeam

BuildingConnected

Trade Tapp

Navisworks

Job description

Senior Mechanical Estimator – Industrial Process Piping

Experience & Background

• Proven experience estimating self-performed mechanical and piping scopes across multiple US Regions in industrial markets such as:
  • Chemical and petrochemical
  • Refining and midstream
  • Power generation
  • Food & beverage and sanitary process systems
  • Pharmaceutical, biotech, and advanced manufacturing
• Strong background estimating:
  • Greenfield and brownfield projects
  • Plant expansions, revamps, and live-plant work
  • Shutdowns and short-duration industrial outages
• Experience supporting Design-Bid-Build, Design-Build, EPC, and negotiated project delivery methods

Technical Piping Knowledge

• Expert knowledge of industrial piping systems, including:
  • Carbon steel, stainless steel, chrome/moly, alloy steels
  • Sanitary and hygienic piping systems
  • Plastic and lined piping (PVC, CPVC, HDPE, FRP)
• Strong understanding of:
  • Piping fabrication vs. field erection tradeoffs
  • Weld processes, NDE, and documentation requirements
  • Pipe supports, specialty valves, and packaged equipment tie-ins
• Perform accurate quantity take-offs from P&IDs, isometrics, layouts, and specifications for projects located in multiple states
• Incorporate constructability, congestion, and sequencing impacts into labor productivity

Estimating Systems & Tools

• Proficiency with estimating and take-off platforms such as:
  • Trimble Autobid, or equivalent on-screen takeoff software
  • Bluebeam
  • BuildingConnected / Trade Tapp
• Ability to interpret 3D models (Navisworks, etc.) preferred

Commercial & Risk Management

• Strong understanding of contract structures, including:
  • Lump sum
  • GMP
  • Unit rate and T&M
• Ability to identify and quantify labor-driven risks such as:
  • Productivity loss
  • Staffing constraints
  • Schedule compression
  • Owner-driven operational restrictions
• Prepare detailed:
  • Estimate narratives
  • Labor assumptions and productivity basis
  • Exclusions, clarifications, and contingency recommendations
• Participate in internal risk reviews and executive pricing approvals for projects occurring simultaneously in different states

Remote Work Capability & Distributed Team Collaboration

• Highly effective working in a remote or hybrid estimating environment, maintaining productivity, accuracy, and schedule adherence without direct onsite supervision
• Experienced collaborating with geographically distributed teams of estimators, operations leaders, and project stakeholders using virtual meeting platforms and shared estimating systems
• Comfortable leading or contributing to estimates across multiple regions while ensuring consistency in labor assumptions, pricing strategy, and risk posture
• Capable of supporting limited travel requirements for:
  • Site walks and constructability reviews
  • Pre-bid meetings and client presentations
  • Key project kickoff or risk review milestones
• Travel availability aligned with monthly to quarterly needs, depending on project requirements

Leadership & Collaboration

• Lead estimating efforts for self-performed mechanical piping scopes
• Mentor junior estimators and take-off staff
• Coordinate closely with:
  • Operations and field leadership
  • Project management
  • Engineering and procurement
• Support preconstruction meetings, site walks, and client presentations

Safety & Quality

• Strong knowledge of OSHA requirements and industrial safety best practices
• Experience incorporating site-specific safety programs into labor and cost models
• Understanding of QA/QC requirements related to piping fabrication and installation

Key Attributes

• Highly analytical with a strong command of labor cost drivers
• Detail-oriented with excellent organizational skills
• Clear communicator capable of defending estimates internally and externally
• Comfortable operating in fast-paced, competitive environments