Mining & Natural Resources E-3 Sponsorship Jobs in Arizona

Date: May 15, 2026

Location: Patagonia, AZ, US, 85624

Company: South32 Group Operations Pty. Ltd.

Discover a Brighter Future

At South32, we’re meeting the challenge of enabling a sustainable future through our focus on responsibly producing commodities critical for a low-carbon world. As a collaborative, caring and inclusive company, there’s no better place to make a genuine difference. Together we’re making a positive, global impact that has the potential to change lives. Whatever career path you choose, we’ll support you every step of the way to learn, grow and succeed. So join us, step towards a brighter future and leave your legacy.

ABOUT Hermosa

Hermosa, located approximately 75 miles south-east of Tucson, Arizona, is the only advanced mining project in the United States as of 2023 that could produce two federally designated critical minerals—manganese and zinc—as well as silver and lead. The project has the potential to help power the nation’s clean energy future, strengthen the domestic supply chain of critical minerals, grow the local economy, and improve lives in Santa Cruz County and the surrounding community for generations to come.

WHAT SOUTH32 OFFERS

• Annual short-term incentive bonus that recognizes both your individual performance and the overall success of the business.
• When you choose to contribute more into your retirement savings, South32 will match it up to a certain percentage.
• South32 provides you with 4 weeks paid time off.
• 12 weeks full-paid parental leave for primary careers and 2 weeks full-paid parental leave for secondary careers.

ABOUT THE ROLE

The Maintenance Planner, Operational Readiness plays a key role in ensuring the effective planning, scheduling, and execution of Hermosa’s work management processes. This role is responsible for establishing a strong work management foundation through the development and management of master data, including equipment strategies, job plans, material codes, and asset criticality assessments during the initial phase. Over time, the role transitions into a full-time maintenance planning position, with accountability for weekly planning, scheduling, contractor coordination, and shutdown planning to support operational efficiency and compliance with organizational standards. This role is critical in supporting South32 Hermosa’s operational readiness and long-term asset reliability objectives.

This role is a Permanent position based at the Hermosa Project site, near Patagonia, Arizona.

Other key responsibilities include, but aren’t limited to:

• Build and validate equipment maintenance strategies and task lists.
• Develop detailed work instructions to support safe and efficient execution.
• Ensure alignment with reliability-centered maintenance (RCM) principles.
• Conduct criticality assessments on assets to determine risk and prioritization.
• Categorize equipment based on operational impact, safety, failure modes, and cost implications.
• Use criticality rankings to drive maintenance strategy development and resource allocation.
• Create and maintain material master data in the ERP system (e.g., SAP).
• Establish and manage material master data, critical components, and inventory strategies.
• Collaborate with procurement and inventory teams to optimize stock levels.
• Ensure accurate and complete master data entry for maintenance activities.
• Support work management system improvements by refining data structures.
• Provide data-driven insights to improve asset reliability and planning efficiency.
• Execute preventive, predictive, and corrective maintenance plans.
• Establish and maintain weekly and quarterly work schedules.
• Ensure work orders are properly documented, approved, and prioritized.
• Develop and manage shutdown work scopes to minimize downtime.
• Coordinate and oversee contractor mobilization and execution.
• Ensure compliance with company policies, safety regulations, and budgetary constraints.
• Analyze work management metrics to identify process improvement opportunities.
• Participate in feedback loops to optimize maintenance strategies.
• Support reliability initiatives through data-driven decision-making.

ABOUT YOU

You will have experience and demonstrate capability in the following:

• Associate’s or Bachelor’s degree in Engineering, Maintenance, Operations Management, or a related field. (preferred)
• 5-10 years experience in maintenance planning, master data management, reliability engineering, or related fields.
• Experience in heavy industry, mining, or manufacturing environments.
• Certification in project management (PMP), asset management (ISO 55000), or Certified Maintenance & Reliability Professional (CMRP).
• Knowledge of reliability-centered maintenance (RCM), preventive & predictive maintenance (PM/PdM), and industry best practices.
• Significant relevant work experience in maintenance planning, master data management, reliability engineering, or related fields may be considered in place of a degree.
• Proficiency in work management systems (SAP or equivalent ERP software).
• Strong analytical skills with data interpretation and asset strategy development.
• Ability to communicate effectively and collaborate with cross-functional teams.

South32 is committed to building and maintaining an inclusive and diverse workforce that reflects the communities in which we operate. We provide a recruitment process that is fair, equitable and accessible for all and we encourage candidates from all backgrounds to apply.

South32 está comprometido a cimentar y mantener una plantilla de trabajadores diversa e inclusiva que refleje las comunidades en las cuales trabajamos. Proporcionamos una proceso de contratación que es justo, equitativo y accesible para todos y alentamos la aplicación de candidatos de todas las procedencias.

Nearest Major Market: Nogales