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Lab Sample Prep Operator

Excelsior Mining, Inc.
Dragoon, AZ Full Time
POSTED ON 1/10/2026
AVAILABLE BEFORE 3/9/2026
Gunnison Copper-formerly Excelsior Mining has an immediate employment opportunity for Lab Sample Prep Operator(s) at its operations at Johnson Camp Mine / Gunnison Project located in southeastern Arizona between the cities of Benson and Willcox.
Under the direction of the Laboratory Manager/Lab technician, the Lab prep operator will process samples received from mine to analyze them in the assay lab. He will play a crucial role in ensuring the quality and reliability of analytical testing by meticulously preparing samples for analysis.
Responsibilities:
  • Prepare samples for analytical assays performed in mine samples (collect, dry, crush, pulverize).
  • Record weight and process daily samples received.
  • Ensure proper identification of samples during all stages of the preparation process.
  • Proper use of equipment to avoid cross contamination of samples.
  • Follow priorities as per instructions from the laboratory.
  • Ensure samples received match with list provided by mine.
  • Perform operation, diagnostics, adjusting or calibration to sample prep equipment.
  • Ensuring the cleanliness and organization of the ample prep. area and equipment.
  • Other activities as needed.
  • Train and develop sample prep. operators in all aspects of sample prep. Duties.
  • Always wear and use proper PPE as per company policies and procedures.
  • Work safely in accordance with company policies and MSHA requirements, identifying Hazards, develop pre-shift inspections and report any unsafe conditions.
  • Always wear and use proper PPE as per company policies and procedures.
  • Have and follow good working practices to maintain a clean work area in accordance with standard lab practice and procedures.
  • Maintain a high standard of housekeeping in all work areas.
  • Perform preventive maintenance to sample prep equipment and keep it in optimal performance.
  • Identify and resolve issues related to sample preparation procedures and equipment.
  • Develop a culture of high performance and behaviors that are consistent with company values.

Qualifications:
  • Ability to troubleshoot issues that may arise during sample preparation.
  • Understanding how to use various equipment and following established procedures.
  • Basic knowledge of MS Office products – Word, Excel, PowerPoint and Outlook, desired
  • Basic knowledge of safety procedures including personal protection equipment (PPE) and standard lab safety procedures.
  • Demonstrated knowledge of sample prep equipment operation.
  • Secondary or high School or commiserate level experience.
  • 1 years working in sample prep environment, preferred.
Additional Requirements:
  • Strong Communication Skills
  • Attention to detail and accuracy are critical.
  • Must be a highly motivated, energetic team player who enjoys a fast-paced work environment and be proficient
  • May be required to work varying shifts to include days, nights and weekends.
  • Flexibility to adapt to improved procedures and best practices.
  • Organized and with good time management skills.
Gunnison Copper offers a competitive wage and comprehensive benefits package including 401k. Candidates must have the ability to work unrestricted in the U.S. as there is no visa sponsorship. Successful completion of a background check is required after the offer of employment. Gunnison Copper uses the E-Verify system during the hiring process to confirm employment eligibility to work in the United States.

Salary.com Estimation for Lab Sample Prep Operator in Dragoon, AZ
$50,073 to $64,217
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