Intern, Technical Services (Geotechnical Engineer)

Date: Nov 20, 2025

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.

ABOUT THE ROLE

As the Geotechnical Engineer Intern, you will support the site Geotechnical and Technical Services team in evaluating ground conditions, collecting geotechnical data, assisting with underground monitoring programs, and contributing to safe and efficient mine development during the 2026 summer season. This role is based in Hermosa Site near Patagonia, Arizona.

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

- Conduct underground mapping using industry-standard systems (Q-System, RMR).

- Support geotechnical data collection programs and logging data QC.

- Help evaluate and verify installed ground support (bolting, mesh, shotcrete, cable bolts).

- Participate in ground support QA/QC including pull testing and shotcrete/concrete QC.

- Participate in underground inspections, hazard identification, and ground condition reviews.

- Ensure all tasks are carried out in accordance with site safety protocols and ground control standards.

- Participate in safety meetings, JHAs, and risk assessments for geotechnical activities.

- Exercise responsible decision-making regarding conduct and adhere to South32 policies and procedures.

- Perform other duties as assigned.

About You

You will have experience and demonstrate capability in the following:

- Currently pursuing a Bachelor’s or Master’s degree in Geological Engineering, Mining Engineering, Geotechnical Engineering, Geology, or related discipline.

- Ability to uphold workplace safety and ability to abide by South32’s policies and procedures.

- Excellent interpersonal skills and ability to communicate clearly in technical settings.

- Self-motivated, detail-oriented and eager to learn.

- Strong problem solving and analytical skills.

- Ability to take direction from leadership, mentors and managers.

- Basic proficiency with technical writing, Microsoft suite, etc.

- Authorization to work in the United States.

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.

Nearest Major Market: Nogales