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Maintenance Supervisor I (S Mill)


This is a Full-time position in Green Valley, AZ posted August 3, 2022.

Positions Open: 1

Site Name: Mission Mine

Site Location: Sahuarita, US-AZ, 85629


Under general supervision, supervises, coordinates, and controls the safe and efficient operation of an assigned work unit in the Concentrator.


  • Direct the activities of assigned crew and monitor their progress.
  • Implement production plans according to approved schedule.
  • Meet all production targets through efforts of the crew following process parameters and strategies.
  • Prepares estimates of the staffing, materials, and equipment requirements for projected work activities.
  • Ensure the crew follows the cost-control strategies.
  • Enforce safe practices, ensure safe conditions, and promote a safe attitude among crew members.
  • Comply with environmental requirements and promote environmental awareness among crew members.
  • Keep time worked and enter in the on-line system.
  • Administer the provision of the Collective Bargaining Agreement.
  • Inspects and evaluates work in progress, identifies any problem areas, and may direct remedial action.


  • Must be able to work rotating shifts and holidays (24/7/365 operation).
  • Must be proficient with MS Windows, MS Word, MS Excel, and MS Outlook.
  • Experience with operation/maintenance of milling and/or similar process equipment (i.e. conveyors, crushers, ball mills, sag mills, vertical mill, screen decks, agitators, rotors, belts, pulleys, gear boxes, lube systems, etc.). Skilled in planning and scheduling for preventive maintenance
  • Strong interpersonal skills in developing consensus building.
  • Applicant must communicate effectively, both orally and in writing.
  • Must be able to manage time effectively and set priorities.
  • Skilled in resolving day-to-day questions/problems regarding equipment, materials, methods, and procedures needed to complete projects.
  • Requires the ability to manage multiple tasks and troubleshoot problems.
  • Ability to effectively present information in one-on-one and small group situations to customers, clients, and other employees of the organization.
  • Ability to read and interpret documents such as safety rules, operating and maintenance instructions and procedure manuals.
  • Ability to write routine reports and correspondence.
  • Practical knowledge of MSHA standards as enforced.


  • High School Diploma or GED.
  • Some college or technical school education.
  • 5 years milling process experience and 0-3 years supervisory experience.


  • The job requires training or instruction in environmental Awareness.
  • This job requires training or instruction in Safety & Health awareness including completion of the appropriate OSHA and/or MSHA training.

A core value of ASARCO LLC is “Safety First.” The Company is committed to help employees continuously improve their efforts to work in the most safe, inclusive, socially, and environmentally responsible manner practicable. Employee safety and health, both on and off the job, are critically important to the Company. Therefore, ASARCO LLC requires employees to have and effectively demonstrate good working knowledge of modern safety systems. Each employee will take prime responsibility for ensuring that s/he works within all required safety procedures and processes.

ASARCO LLC is an equal opportunity employer. Candidates must possess a current and valid driver’s license. Offers of employment are contingent upon a successful criminal background check and pre-employment physical including a drug screen.

ASARCO LLC offers an excellent benefits package for medical/prescription/ dental/vision, disability coverage, life insurance and other optional coverage, and 401(k) plan with company match.


Associated topics: backfill, crew, ice, jardinero, land fill, maintenence, paver, resurface, street, superintendent