Mine Geologist
Company: Technical Professionals Group
Location: Sahuarita
Posted on: April 3, 2026
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Job Description:
TPG is seeking an enthusiastic Mine Geologist to be part of a
dedicated team focused on supporting copper production at a
porphyry skarn copper deposit adjacent to Tucson, Arizona. The Mine
Geologist plays a critical role in supporting safe and efficient
ore extraction by providing accurate geological interpretation, ore
boundary definition, and field validation at a high-tonnage
open-pit copper mine, which processes sulfide ore. Reporting to the
Chief Mine Geologist, this position ensures that ore control
decisions are informed by field observations and geological data,
and that ore routing supports Mine-to-Mill optimization and
performance. The Mine Geologist is instrumental in linking and
integrating geology with operations, planning, and metallurgy to
drive site-wide value generation. Key Responsibilities: Conduct
detailed pit mapping, geologic logging, and sampling with focus on
lithology, structure, alteration, and mineralization, ensuring
accurate material classification. Define and update grade control
polygons and ore/waste boundaries, ensuring ore is routed
appropriately to mill, stockpiles, or waste deposition areas.
Support Mine-to-Mill initiatives by identifying rock
characteristics that impact fragmentation, handling, and plant
throughput, and communicating findings to Drill & Blast and
Processing teams. Collaborate with the Metallurgy teams to define
and optimize geometallurgical parameters for mineral processing.
Contribute geological insight to shovel placement and short-range
production plans to minimize dilution and maximize recovery. Assist
in the update of 3D operational geology models in Leapfrog Geo,
ensuring current pit conditions are reflected in planning inputs.
Participate in F1-F3 grade reconciliation processes, comparing
predicted vs. actual performance, identifying causes of
discrepancies, and refining geological interpretations. Perform
QA/QC of sampling procedures, including blast hole logging, mine
laboratory performance, and data integrity reviews. Coordinate
closely with Mine Engineering and Mine Operations to ensure
geological guidance is actionable and aligned with the short-range
mining schedule. Report findings and provide visualizations in
daily/weekly production meetings and planning reviews. Ensure
geological work and documentation adhere to international best
practices, including conformity with U.S. SEC SK-1300 technical
reporting standards as applicable. Ensure compliance with site HSE
standards and promote safe fieldwork practices. Requirements
Qualifications: Bachelor's degree in Geology or a related
discipline 2 years of open pit mine geology experience, preferably
in porphyry copper systems Working knowledge of ore control methods
and field validation for both mill-grade material Familiarity with
Mine-to-Mill concepts, including fragmentation analysis and
geometallurgical impacts Strong software kills, preferably with
proficiency in geologic/mining software (Leapfrog Geo, MinePlan,
Vulcan, or similar) Strong observational skills and ability to work
closely with cross-functional teams in field and office settings
Effective communication and technical documentation skills Valid
driver's license This position offers an excellent low-cost
benefits package for medical/prescription/ dental/vision,
disability coverage, life insurance and other optional coverage,
and 401(k) plan with company match. Salary/Exempt
Keywords: Technical Professionals Group, Catalina Foothills , Mine Geologist, IT / Software / Systems , Sahuarita, Arizona
