Estimator- Plumbing & Mechanical

Estimator – Plumbing & Mechanical (Construction, Service, Retrofit)

At Maui Plumbing Inc., we don’t just price projects, we define the standard for how work is planned, executed, and delivered.

Our Estimators play a critical role in the success of our projects by ensuring accurate, well-structured, and complete project pricing across service, construction, remodel, and retrofit work.

We are seeking a detail-oriented, analytical Estimator who not only builds estimates, but also reviews, validates, and strengthens incoming estimates to ensure alignment with company standards, pricing accuracy, and project success.

Position Summary

The Estimator is a seasoned role within the Estimating Department responsible for the preparation, validation, and continuous improvement of project estimates.

In addition to developing estimates, this role is responsible for:

• Reviewing incoming estimates (internal and external)
• Ensuring scope completeness, pricing accuracy, and alignment with MPI standards
• Identifying gaps, risks, and inconsistencies before proposals are finalized.

The Estimator will lead the preparation, calculation, quantity surveying, qualification, and packaging of project proposals under general direction, with final review by leadership.

Scope of Work 

Estimate Development

• Review proposal specifications and drawings to determine full scope of work
• Perform complete quantity take-offs and develop detailed cost estimates
• Build labor, material, and equipment pricing based on current market conditions
• Prepare conceptual and detailed estimates using historical and real-time data

Estimate Review & Validation (Expanded Role)

• Review incoming estimates from internal teams, project managers, and field input
• Validate scope coverage, production assumptions, labor rates, and material pricing
• Identify scope gaps, overlaps, and risk exposure
• Ensure consistency across estimates in methodology, structure, and margin strategy
• Provide feedback and corrections to improve estimate quality across the organization

Vendor & Subcontractor Coordination

• Generate Requests for Proposals (RFPs)
• Analyze vendor and subcontractor bids for completeness, accuracy, and feasibility
• Compare pricing, scope coverage, and delivery timelines
• Maintain current pricing data through supplier relationships and market research

Data, Reporting & Continuous Improvement

• Maintain organized files of all estimate backup documentation
• Analyze historical job cost data, productivity reports, and purchase orders
• Develop benchmarks and guidelines for future estimating accuracy
• Support development of standardized estimating practices across departments

Proposal Preparation

• Prepare final proposal deliverables including:
• Accurate pricing
• Scope qualifications
• Inclusions and exclusions
• Support leadership in reviewing design options and cost-driven decisions

• 4-year engineering degree or equivalent technical training and/or experience
• 2–5 years of estimating, controls, or engineering experience in construction or mechanical/plumbing systems
• Strong understanding of estimating techniques, cost control, and construction methods
• Ability to interpret drawings, specifications, and computerized cost systems
• Ability to independently estimate small to mid-sized projects with minimal supervision

Core Values in Action

At MPI, how you approach your work matters as much as the result:

• Integrity – Ensure every estimate is honest, complete, and defensible
• Teamwork – Collaborate with operations, field teams, and leadership
• Consistency of Effort – Deliver accurate, reliable output across all estimates
• Pride in Work – Take ownership of the quality and clarity of your estimates

These values guide decision-making and performance in this role

Physical Requirements
The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. While performing the duties of this job, the employee must be able to sit or stand for an extended period of time. Occasional lifting of up to 30lbs. 

Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions of this position.

Work Environment

The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. While performing the duties of this job, the employee may be exposed to indoors or outdoors and exposed to weather elements. This position requires the ability to, with short notice, work extended hours to ensure job completion.

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.
Benefits

• 401(k)
• Dental insurance
• Health insurance
• Vision Insurance
• Paid time off
• Paid Vacation Time off
• Paid MPI Observed Holidays

Schedule

• 8 hour shift
• Monday to Friday
• On call
• Overtime
• Weekends as needed

If you are an estimator who takes pride in accuracy, sees what others miss, and wants to play a critical role in shaping project success—we want to hear from you.

This is an opportunity to:

• Lead and improve estimating standards across the company
• Work across diverse project types (service, construction, retrofit, remodel)
• Be a key contributor to operational and financial success

Apply today and help set the standard for how projects are built—starting with how they’re estimated.