Geologist Open-Pit Production (Porphyry Copper)

Asarco • Kearny, AZ

8d • Onsite

About The Position

ASARCO Ray Mine is seeking a Mine Geologist to support copper production at an open-pit porphyry copper deposit that processes sulfide and oxide ores. The role supports safe and efficient ore extraction through geological interpretation, ore boundary definition, and field validation at an autonomous haulage, high-tonnage open-pit mine. It helps ensure ore control decisions are grounded in field observations and geological data, and that ore routing supports Mine-to-Mill optimization and LSXEW leach material performance. The position connects geology with operations, planning, and metallurgy to generate site-wide value. It reports to the Chief Mine Geologist.

The position involves daily production geology activities in both active-pit and office settings, including ore control, mapping, logging, sampling, geological model updates, reconciliation, and quality reviews. The successful candidate will work closely with operational and technical teams and follow site HSE and technical reporting standards.

Requirements

• Bachelor’s degree in Geology, Geological Engineering, or a related discipline.
• At least 2 years of active, hands-on open-pit production geology experience within operating porphyry copper systems, including daily involvement in ore control and grade reconciliation.
• Working knowledge of sulfide/oxide transitions, heap leach behavior, and Mine-to-Mill fragmentation concepts in open-pit environments.
• Hands-on proficiency in operational geological and mine planning software such as Leapfrog Geo, Maptek Vulcan, or MinePlan.
• Strong observational skills and ability to work cross-functionally in active pit and office settings.
• Effective communication and technical documentation skills.
• Current and valid driver’s license.
• Successful criminal background check and pre-employment physical, including a drug screen, are conditions of employment.

Responsibilities

• Execute daily open-pit ore control, including rapid ore/waste boundary updates, blast hole logging, and active mining shovel support to minimize dilution.
• Conduct detailed pit mapping, geologic logging, and sampling focused on lithology, structure, alteration, and mineralization for accurate material classification.
• Partner with Drill & Blast, Short-Range Mine Planning, Operations, and Processing teams to support Mine-to-Mill optimization.
• Collaborate with LSXEW and Metallurgy teams to optimize heap leach material selection, copper solubility, and acid consumption compatibility.
• Assist in updating 3D operational geology models in Leapfrog Geo under the direction of the Chief Geologist.
• Participate in grade reconciliation, QA/QC of sampling procedures, and data integrity reviews.
• Ensure field and documentation practices comply with site HSE standards and technical reporting standards.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level