Sr. Estimator
- Location
- Houston, TX · On-site
- Job type
- Full-time
- Level
- Senior
- Experience
- 7+ years
- Listed
- 30 days ago
Skills & highlights for this role
- RSMeans
- cost estimation
- Excel data analysis
Also useful
- EPC/EPCM project delivery
- mining operations knowledge
Role Overview
Mariana Minerals is seeking an experienced and detail-oriented Sr. Estimator to lead cost estimation efforts for mining and mineral processing projects. This role is responsible for developing accurate, competitive, and timely cost estimates that support strategic decision-making and project success.
What You’ll Do
- 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
What You’ll Bring
- 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
- Experience with EPC/EPCM project delivery models
- Familiarity with mining projects
About Mariana Minerals
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.
Our Culture Is Built on Four Principles
Everyone Gets Home Safe. We never put speed or cost ahead of people.
Extreme Ownership. We take full responsibility for outcomes, relentlessly driving toward solutions.
Engineer Out Requirements, then Automate. We simplify, optimize, and then automate for scale.
Share Your Legos. We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.
Join us as we build the future of responsible mineral sourcing and supply!
From Mariana Minerals's careers page, first listed on Rolev.ai on October 10, 2026. Rolev.ai is not the employer.
How Rolev.ai helps with this application
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Common questions
Where is the Sr. Estimator job at Mariana Minerals located?
This Sr. Estimator position at Mariana Minerals is located in Houston, TX (On-site). Always check Mariana Minerals's application page for specific state eligibility or relocation policies.
What qualifications are required for Sr. Estimator at Mariana Minerals?
For the Sr. Estimator role, Mariana Minerals highlights 7+ years of relevant experience; experience with RSMeans, cost estimation, Excel data analysis. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.
How do I apply for the Sr. Estimator position at Mariana Minerals?
This listing links directly to Mariana Minerals's Ashby application page. You can apply directly on Mariana Minerals's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Ashby application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.