Mariana Minerals
Sr. Estimator
Houston, TX · On-site · Senior · Full-time · Posted Jul 31, 2026
- Experience
- 7+ years in estimating within mining, heavy industrial, or construction environments.
About the job
Leads cost estimation for mining, mineral processing, and infrastructure projects, supporting project decisions and delivery.
What you'll do
- Prepare and validate cost estimates using project documentation, RSMeans, and supplier and subcontractor quotes.
- Maintain estimating databases and tools; identify project risks and opportunities and support cost analysis throughout the project lifecycle.
- Collaborate with engineering, procurement, project management, PCM, and Software Engineering teams; mentor junior estimators and support estimating automation.
What they ask for
- 7+ years of estimating experience in mining, heavy industrial, or construction environments.
- Strong knowledge of mining operations, materials, and equipment; proficiency in RSMeans.
- Advanced Excel and data analysis skills; ability to interpret technical drawings and specifications.
- Availability to travel 20% of the time to sites or Mariana Minerals offices.
Nice to have
- Experience with EPC/EPCM project delivery models.
- Familiarity with mining projects.
Tools
RSMeans, Excel
AI focus
The company’s mission includes supplying minerals for AI technologies; the role supports development of systems and tools to automate estimating processes, with no specific AI work stated.
Model-written summary · the original posting is authoritative