Sr. Estimator

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 estimates
• 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 estimates
• Develop and maintain cost databases, benchmarks, and estimating tools
• Identify project risks and opportunities and provide 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 PCM and Software Engineering teams in developing operating systems and tools to automate estimating processes

Requirements

• 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

Preferred Qualifications

• Experience with EPC/EPCM project delivery models
• Familiarity with mining projects

About the Company

Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.