Careers


Join a Local Team with Global Impact

Looking for a career that matters, with a company that cares?

Join U.S. Borax and help us achieve our mission: supplying the world with refined borates, remarkable minerals that are essential to human progress and modern living.

Learn More About Careers at Rio Tinto
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A History of Integrity

For more than 145 years, U.S. Borax (a division of Rio Tinto)—known for our 20 Mule Team® Borax brand—has mined boron from California. Today, we operate the state’s largest open pit mine (in Boron, California), one of the richest borate deposits on the planet. U.S. Borax is the known leader in borate technology, research, and development. We supply a third of the global demand for refined boron, an ingredient in a diverse range of vital products, from crop fertilizer to cell-phone glass.

Our long-standing commitment to innovation and improvement extends to our world-class safety, environmental, and community practices. With 50,000+ employees in more than 40 countries, we offer opportunity for advancement, an open and diverse culture, and a responsible and responsive work environment. We also forge close relationships with the communities in which we operate, becoming involved in education, supporting local communities, awarding grants for social and health programs, and striving for close involvement with local governments and NGOs.

As pioneers in mining and metals, we produce materials essential to human progress. 

Pioneering progress
As pioneers in mining and metals, we produce materials essential to human progress. Watch the video

Employee Spotlight

Driving improvements with data

Meet Justin Sewell, shipping and rail operations superintendent, at our Boron Operations in California, United States. Justin has developed an app to monitor trucks at Boron, and it’s helping drive efficiency across the operation.

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Teaming up for quality excellence

Meet Evan Stevens, senior quality adviser, at our Boron Operations in California, United States. Evan is part of a team that oversees the quality control checks throughout the mining process.

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Be a Part of Our Team

Want to learn more about working with U.S. Borax? Attend one of our local job fairs or visit our corporate site to get started.

Our world-class mining company offers world-class benefits for represented employees:

Health Plans

  • Medical
  • Prescription drug
  • Dental Vision
  • Health Savings Account (HSA)
  • Flexible Spending Accounts (FSA)
  • Employee Assistance Plan (EAP)

Retirement Plans

  • 401(k) with up to 5% match with immediate vesting
  • Retirement contribution plan
  • Stock purchase options

Employee Insurance

  • Life insurance
  • Accidental death and dismemberment insurance

Other benefits

  • Dependent/elder care
  • Flexible Spending Accounts (FSA)

Employees at our Boron location enjoy an affordable lifestyle in the scenic countryside of California:

  • If you live close to LA, you will be driving opposite traffic
  • Career Progression from entry level to 1st Class Tradesman
  • Unique exposure to the various aspects of an operating plant
  • Our people work consistent schedules at the same location
  • Opportunities for working overtime; some schedules have built in overtime
  • Working 12 hour shifts – so you have less driving and long weekends

Learn More About Careers at Rio Tinto

U.S. Borax, part of Rio Tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. We are 1,000 people serving 500 customers with more than 1,700 delivery locations globally. We supply 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles east of Los Angeles.  Learn more about Rio Tinto

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