Mining & Natural Resources Visa Sponsorship Jobs in California
California leads the nation in mining innovation, from lithium extraction in the Salton Sea to rare earth minerals in the Mojave Desert. Major employers like Albemarle, Tesla's battery supply chain partn visaers, and renewable energy mineral companies actively sponsor H-1B visa and O-1 visas for specialized mining engineers, geologists, and environmental scientists.
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Millwright Journeyperson
- Opportunity to develop your career and work for a global company.
- Contribute to the success of Rio Tinto by applying your skills and professional expertise.
- Join a company with a world class reputation for safety and a culture that supports inclusion and diversity.
- Role based in Boron, California
- For California based roles the expected hourly rate is $42.13
About the role
Finding better ways to provide the materials the world needs
We are looking for a Millwright Journeyperson to join the Rio Tinto Maintenance Department and provide construction, installation, relocation, repair, and preventative maintenance on machinery, equipment, and facilities for the optimum operating efficiency.
This role is a great opportunity to become part of Rio Tinto Borates which operates globally providing borates to world markets.
In addition to paying competitively and providing great benefits packages, we want you to live the lifestyle that is right for you and your family. And because of our size and scale, there are many opportunities to learn, grow and do more than you ever thought possible.
Every hour of every shift, your safety and wellbeing is our number one priority. We do the work only if it is safe, and we invest to make sure every member of the team has the quality tools they need to do their job.
Working and reporting to the Maintenance Supervisor, you will be:
- Coordinates Millwright’s function with overall Plant operations.
- Using power and hand equipment, performs varied types of rigging, often at heights which require climbing and the use of safety lines or bos’n chairs.
- Splices hemp and wire rope.
- Diagnoses and repairs all types of equipment, including pumps, elevators, screw conveyors, belting, material handling, crushers, centrifuges, and dryers, etc.
- Performs oxy-acetylene or arc welding to fabricate, install, or repair equipment.
- Determines size and type of welding rod, proper heat application and type of welding required. Performs butt, fillet, horizontal, vertical and overhead welding on plate, structural steel, pipes and machinery.
- Installs, repairs, cleans and replaces pipes and fittings for refrigeration, steam, air, water, ammonia, acid process and other industrial pipe lines.
- Installs, repairs, cleans and replaces domestic water and sewer lines.
- Reads, understands and utilizes information contained in blueprints and drawings related to the installation or repair of equipment.
- Routinely inspects, tests and operates equipment to determine whether it is functioning properly and safely.
- Studies information on new equipment and participates in training related to its maintenance.
- Assists in training less-skilled employees.
What you’ll bring
- A commitment to the safety of yourself and your team
- Must have one to two years’ experience in metal fabrication, Arc welding, oxygen and acetylene welding
- Experience repairing shovels, pipelines, pumps, crushing and conveying equipment is preferred.
- To qualify for Millwright First Class must be Journeyman Craftsman and have a minimum of four years relevant experience
- High School Diploma or GED
- Valid State Driver’s License
What we offer
We are committed to providing our employees with what they deserved. Be recognized for your contribution, your thinking, your hard work, and go home knowing you’ve helped the world progress, we provide:
- A safety-focused and inclusive working environment
- Access to top tier family-friendly health programs including medical, prescription drug, dental, vision, life insurance coverage and various voluntary benefits.
- A 5% of base pay Company contribution to save for your retirement needs.
- 401(k) matching program (company matched .35 per dollar up to 6% of your base pay)
- Generous Rio Tinto employee share program, which allows you to purchase Rio Tinto stock in the form of ADRs and includes matching Company shares.
- Comprehensive leave policies which cover all moments that matter in life (vacation, paid sick leave, paid holidays, paid bereavement leave).
- Regional and national discounts program for a multitude of leisure purposes and products
- Ongoing Employee Assistance Program (EAP) for you and your family; to help in addressing educational opportunities, addiction treatment, depression, stress, domestic issues, financial management, and legal concerns.
- Virgin Pulse Wellbeing Program with incentives to help with physical fitness, nutrition, sleep habits, stress management, and more.
About Rio Tinto
Rio Tinto is a leading global mining and materials company. We operate in 35 countries where we produce iron ore, copper, aluminium, critical minerals, and other materials needed for the global energy transition and for people, communities, and nations to thrive. We have been mining for almost 150 years and operate with knowledge built up across generations and continents.
Our purpose is finding better ways to provide the materials the world needs – striving for innovation and continuous improvement to produce materials with low emissions and to the right environmental, social and governance standards. But we can’t do it on our own, so we’re focused on creating partnerships to solve problems, create win-win and meet opportunities.
Where you will be working
Rio Tinto Borates is a global leader in industrial mineral supply and science. We supply approximately 25% of the world’s demand for refined borates, minerals essential to life and modern living. We seek to create mutual value by working closely with our investment partners and host communities. Our 20 Mule Team Borax brand pays tribute to our first borates mining operation in Death Valley in 1872.
Respect and Inclusion
Rio Tinto is committed to equal employment opportunity. All qualified applicants will be considered without regard to race, color, sex, age, religion, national origin, disability, or any other characteristic protected by federal, state, or local law.
We are committed to an inclusive environment where people feel safe, respected and valued. We want our people to feel that all voices are heard and that a variety of perspectives are not only welcome but are essential to our success. We treat all our people fairly and with dignity.
Rio Tinto participates in E-Verify to confirm work authorization. Please visit http://www.ucis.gov/ for more information.
Mining & Natural Resources Job Roles in California
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Search Mining & Natural Resources Jobs in CaliforniaMining & Natural Resources Jobs in California: Frequently Asked Questions
Which mining & natural resources companies sponsor visas in California?
California's mining sector includes Albemarle Corporation for lithium extraction, Rio Tinto's boron operations in Kern County, and Tesla's mineral supply chain partners. Clean energy companies like Controlled Thermal Resources and Hell's Kitchen Lithium also sponsor visas for mining engineers, geologists, and process engineers working on critical mineral extraction projects throughout the state.
Which cities in California have the most mining & natural resources sponsorship jobs?
Los Angeles and San Francisco dominate due to corporate headquarters and research facilities, while Bakersfield and Ridgecrest offer operational roles near active mining sites. The Imperial Valley region, particularly near the Salton Sea, has emerging opportunities in lithium extraction. Fresno and Sacramento also host mining company regional offices and environmental consulting firms.
How to find mining & natural resources visa sponsorship jobs in California?
Migrate Mate specializes in connecting international professionals with California mining companies that sponsor work visas. The platform filters opportunities by visa type and location, making it easier to identify employers actively hiring foreign nationals for mining engineering, geology, environmental science, and mineral processing roles across California's diverse mining regions.
What visa types are most common for mining & natural resources roles in California?
H-1B visas dominate for mining engineers, geologists, and environmental scientists requiring bachelor's degrees. O-1 visas apply to researchers with extraordinary ability in mineral extraction technology or environmental remediation. TN visas serve Canadian and Mexican mining professionals, while L-1 visas facilitate international mining company transfers to California operations.
Are there specific considerations for mining visa sponsorship in California?
California's strict environmental regulations require specialized knowledge, making foreign expertise valuable to employers. The state's focus on clean energy minerals creates demand for professionals experienced with lithium, rare earth, and battery material extraction. Many positions require security clearances for defense-related mineral projects, which can affect visa eligibility and processing timelines.
What is the prevailing wage for sponsored mining & natural resources jobs in California?
U.S. employers sponsoring a visa must pay at least the prevailing wage, which is what workers in the same role, area, and experience level typically earn. The Department of Labor sets this rate to make sure companies aren't hiring foreign workers simply because they'd accept lower pay than a U.S. worker. It varies by job title, location, and experience. You can look up current prevailing wage rates for any occupation and location using the OFLC Wage Search page.