Mobile Maintenance Supervisor
- A company with a world-class reputation for safety and performance
- Opportunity to work for a global mining company with the latest technology and innovation
- Excellent opportunity to develop your career – Boron, California
- For California based roles the expected annual salary is $90,000 – $123,750
About the role
Finding better ways to provide the materials the world needs
We are looking for a Mobile Maintenance Supervisor to join a team of maintenance supervisors and maintenance superintendent by continuing to our mining fleet running efficiently. The department is responsible for maintaining production mining equipment and support equipment in the mine and light mobile equipment in the fixed plant.
U.S. Borax operates globally providing borates to world markets. Recognized as a leader in the industrial minerals industry due to product quality, supply reliability and technical support; we are proud to make modern life work. From our location in Boron, California we supply refined borates which are key ingredients in fiberglass, glass, ceramics, fertilizers, wood preservatives and many other products.
This role is a great opportunity to learn and develop your career. Our maintenance staff and supervision work a 12-hr. rotating schedule Sunday through Tuesday or Thursday through Saturday and every other Wednesday. It is a fixed schedule for dayshift or nightshift and candidates must be flexible to work either shift. Working and reporting to the Superintendent, you will be:
- Considering safety of people within the team as priority when they work and complying with Rio Tinto and Statutory Safety requirements.
- Leading a team of Diesel Mechanics& Electricians to support Heavy Mobile Equipment: D-10 dozers,16H graders, Diesel production drills, 240-ton diesel electric haul truck and electrical shovels.
- Providing leadership for a team of Maintainers and enable each person to contribute to their full potential.
- Following-up and reporting on any action plans assigned to you.
- Monitoring continually the maintenance processes and compliance with the schedule while, improving maintenance processes and activities, with a focus on minimizing costs.
- Demonstrating appropriate behaviour supporting the direction of RTM and articulating your expectations of behaviour to your team members.
What you’ll bring
- A commitment to the safety of yourself and the team
- High School Diploma or GED equivalent
- 5+ years of experience in mobile equipment maintenance with increasing responsibility
- Experience in supervising a union workforce
- Excellent written verbal, and presentation skills to communicate effectively with stakeholders at all levels of the organization
- Excellent computer skills, knowledge of MS Office, Excel, MS Project & SAP
- Associate degree
- Knowledge of MSHA regulations
What we offer
Be recognised for your contribution, your thinking and your hard work, and go home knowing you’ve helped the world progress
- A work environment where safety is always the number one priority
- Competitive base salary reflective of your skills and experience with an annual incentive bonus
- Access to top-tier family-friendly health programs including medical, prescription drug, dental, vision, life insurance coverage, and various voluntary benefits
- Excellent retirement plan including up to 6% defined company contribution; Generous 401k matching program
- Attractive share ownership plan
- Comprehensive leave policies which cover all the moments that matter in life: PTO (paid time off), paid holidays, and paid bereavement leave
- A generous parental leave policy, which ensures you’re able to spend quality time with your new family
- Discount programs for leisure purposes and access to Virgin Pulse with incentives supporting your wellbeing
- Access to our Employee Assistance Program (EAP), which provides confidential counselling or expert guidance for you and your family to help get through life’s challenges
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 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.
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 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 situations and meet opportunities.
Every Voice Matters
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.
JOB_POSTING-3-11949
Rio Tinto is a leading global mining and materials company. We operate in 35 countries where we produce iron ore, copper, aluminum, critical minerals, and other materials needed for the global energy transition and for people, communities, and nations to thrive.
We have been mining for 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.
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.
Take your leadership career to the next level.
Where can Rio Tinto take you?
You’re passionate and ambitious with tremendous career aspirations. The breadth and growth of our organisation empowers you to define your ideal career path.
Take a look at Katie’s career journey
Take a look at Shona’s career journey


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Working at Rio Tinto
Help us deliver the materials that make human progress possible.
The plane you’re flying in just landed. You fire up your phone and get your laptop out of the overhead bin. Immediately, you’re in work mode – thousands of miles from your office. Do you ever stop to think about all the materials that make life in the 21st century possible? At Rio Tinto, we discover, develop and deliver the materials that drive human progress. When you work with us, you’ll experience advantages you won’t find anywhere else.
Our application process
01
Apply
The first thing you’ll need to do is apply to the role. You can do this with your LinkedIn profile or you can upload your resume. We’ll also ask you to complete a few questions before you submit your application.
02
Undergo assessments
Our assessments are designed to help us work out whether you are suitable for the role. We will let you know which ones you’ll need to complete.
03
Interview(s)
Our interviews could be in person or online. It’s a great opportunity for us to get to know you a bit better, answer any of your questions and talk about the exciting career opportunity you have applied for.
04
Offers and checks
At this stage, we will let you know if you have been successful. If you have been, we’ll need to conduct a couple of checks, such as a background or security check. You may also need to do a medical assessment depending on the role you have applied for.
05
Join the Rio Tinto team
Once the checks have been completed, we’ll be in touch to talk with you about your start date and answer any questions you may have before you start with us.



















