Geologic Technician / Core Cutter

Position Summary
Based at our facility in Mariposa, California the Geologic Technician / Core Cutter supports the Exploration and Geology teams by safely processing diamond drill core and assisting with geological data. This position is responsible for core cutting, sampling, labeling, and maintaining a safe, organized core facility.
The role requires a strong commitment to safety, attention to detail, and the ability to work in a physically demanding mining and exploration environment.
Key Responsibilities
Core Processing & Sampling
Cut diamond drill core using core saws in accordance with geologist instructions and sampling protocols
Label, bag, and prepare samples for shipment following chain-of-custody and QA/QC requirements
Maintain sample integrity and accurate documentation
Photograph core and assist with core layout, orientation, and archiving
Ensure proper handling, storage, and security of drill core
Geological Support
Assist geologists with core handling, logging preparation, and sample selection
Record basic geological measurements and observations as directed
Support QA/QC programs including blanks, standards, and duplicates
Assist with core recovery tracking and reconciliation of samples
Health, Safety & Environmental Compliance
Work in compliance with Cal/OSHA, MSHA (where applicable), and site-specific safety requirements
Perform pre-operational inspections of core saws and equipment
Maintain a clean, organized, and hazard-free core shack or facility
Use required PPE at all times (eye protection, hearing protection, gloves, steel-toe boots, etc.)
Immediately report hazards, near misses, and incidents
General Duties
Perform routine cleaning and maintenance of core saws and related equipment
Assist with inventory management of sampling supplies and consumables
Support other exploration or geology-related tasks as assigned
Work collaboratively with geologists, drillers, and contractors
Required Qualifications
High school diploma or equivalent
Valid driver's license
Familiarity with diamond drill core handling and sampling procedures
Ability to safely perform physical work, including lifting and moving core boxes
Strong attention to detail and ability to follow written and verbal instructions
Basic computer skills for data entry and sample tracking
Preferred Qualifications
Post-secondary education in Geology, Earth Sciences, or a related field
Experience as a core cutter, geologic technician, or exploration laborer
Cal/OSHA/MSHA safety training, First Aid/CPR
Experience with geological databases, logging software, or core photography systems
Work Environment
Work will occur in a core facility but may require field work or travel to an underground mine site.
Exposure to water, dust, noise, vibration, and varying temperatures
Shift work, weekends, or rotational schedules may be required
Physical Requirements
Ability to lift up to 50 lbs
Ability to stand, bend, kneel, and perform repetitive tasks for extended periods
Ability to work safely around industrial equipment
Compensation
The pay range for this position will be $20.00 - 25.00 per hour, depending on qualifications and experience. This position is non-exempt and eligible for overtime.
Equal Employment Opportunity
Keystone Mines Inc. is an Equal Opportunity Employer and complies with all applicable California employment laws. We are committed to maintaining a safe, inclusive, and respectful workplace.