Sahuarita, Arizona, United States On-site

ASARCO is hiring a Chief Geologist

Responsibilities

  • Lead and manage teams focused on mine geology and ore control, including geologists, technicians, and samplers, fostering a culture of inclusion, continuous learning, and high performance.
  • Supervise daily geological field activities such as mapping, sampling, and logging to accurately document rock types, structural features, alteration patterns, and mineralization for operational decision-making.
  • Manage short-term ore control processes, including blasthole sampling, assay quality assurance and control using certified reference materials, blanks, and duplicates, and apply corrections for blast movement.
  • Generate validated dig limits and grade control models, clearly distinguishing between mill feed (sulfide), blending material, and waste rock.
  • Integrate geological, drilling, and survey data into a 3D modeling environment using Leapfrog Geo and Seequent Central or similar platforms to support dispatch and planning.
  • Collaborate with mine planning engineers using Hexagon MinePlan or MineSight to provide accurate geological inputs for short-, mid-, and long-term mine scheduling.
  • Maintain and validate density models and assumptions around dilution and ore loss for integration into mine plans.
  • Conduct regular grade reconciliation across daily, weekly, and monthly cycles, comparing ore control data with plant results and resource models to identify and correct discrepancies.
  • Oversee the design and execution of drilling programs, including infill, metallurgical, condemnation, and exploration drilling, ensuring adherence to chain-of-custody and QAQC protocols.
  • Work closely with metallurgical teams to define domains that influence processing performance, including throughput, recovery, reagent use, and concentrate specifications.
  • Support mine-to-mill optimization and blending strategies through accurate geological characterization.
  • Direct field-based geological and structural mapping efforts, including the use of UAVs and LiDAR, to inform geotechnical and hydrogeological analyses.
  • Provide structural and lithological models to support slope stability assessments and pore-pressure management.
  • Evaluate opportunities for resource expansion through targeted drilling and geological interpretation.
  • Plan and interpret reverse circulation and diamond drilling campaigns to advance exploration targets to decision-ready status.
  • Maintain a centralized, auditable geoscience database such as acQuire, enforcing data integrity, standardized coding, and version control.
  • Automate reporting and visualization using GIS and Power BI tools to deliver real-time insights.

Work Arrangement

On-site

Other

  • Operates with minimal supervision
  • Exercises sound professional judgment
  • Demonstrates visible leadership in safety, environmental stewardship, and cross-functional teamwork with Operations, Planning, Geotechnical, Hydrogeology, and Metallurgy
Required Skills
Power BIData Management
Job Details
Department Engineering
Category other
Posted 4 months ago