Senior Estimator - Mining & Processing Projects

Mariana Minerals; United States; Remote; USD 120,000 - 190,000; Full time

Job summary

Mariana Minerals in the United States is seeking a Sr. Estimator to lead cost estimation for mining and mineral processing projects, driving accurate, timely, and competitive estimates to support decision-making.

You will collaborate across engineering, procurement, and project management, develop cost databases, and mentor junior staff while contributing to continuous improvement and automation initiatives.

Qualifications

• 7+ years of experience in estimating within mining, heavy industrial, or construction environments.
• Strong knowledge of mining operations, materials, and equipment.
• Proficiency in RSMeans.
• Advanced skills in Excel and data analysis.
• Ability to interpret technical drawings and specifications.
• Strong analytical, organizational, and communication skills.
• Availability to travel 20% of the time to site or Mariana Minerals offices.

Responsibilities

• Lead the preparation of detailed cost estimates for mining, processing, and infrastructure projects.
• Analyze drawings, specifications, proposals, and other documentation to prepare time, cost, materials, and labor estimate.
• Utilize RSMeans data and tools to develop accurate and benchmarked cost estimates.
• Collaborate with engineering, procurement, and project management teams to ensure accurate and comprehensive estimate.
• Develop and maintain cost databases, benchmarks, and estimating tools.
• Identify project risks and opportunities, providing mitigation strategies.
• Review and validate subcontractor and supplier quotes.
• Participate in bid reviews, value engineering, and project planning sessions.
• Provide ongoing cost analysis and support throughout the project lifecycle.
• Mentor junior estimators and contribute to continuous improvement initiatives.
• Support the PCM and Software Engineering teams in developing operating systems and tools to automate estimating processes.

Skills

Strong analytical skills

Excellent communication

Travel availability

Tools

RSMeans

Excel

Job description

Mariana Minerals in the United States is seeking a Sr. Estimator to lead cost estimation for mining and mineral processing projects, driving accurate, timely, and competitive estimates to support decision-making.

You will collaborate across engineering, procurement, and project management, develop cost databases, and mentor junior staff while contributing to continuous improvement and automation initiatives.