Water Treatment System Operator

About Us

At Onterris, we build careers grounded in purpose, responsibility and real-world impact.

"For Planet and Progress" is our north star that guides everything we do. We believe environmental responsibility and human progress are interconnected, interwoven and international. Our scientists, engineers, field teams, consultants and professionals collaborate across disciplines and geographies, guiding industries and governments, ensuring that communities and environments thrive.

When you join us, you're not just forging a career, you're joining a movement. A movement for better thinking, smarter solutions and lasting impact.

Together, we will advance our way of life and protect the integrity of our environment every step of the way.

We are looking for a full-time Water Treatment System Operator , who will work directly on treatment plants designed to treat contaminated groundwater and vapor. This role will be based at our client site in Corona, CA. This is a full-time position with hours averaging 60 hours per week, with occasional additional hours as needed. The compensation for this role is $25/hour.

A Day in the Life

As a key member of the team, this role will be responsible for a full range of activities including:

• Coordinate operation, maintenance, and repair of water treatment equipment and associated well field and support equipment.
• Perform and direct activities to ensure that codes, standards, and water treatment objectives are met while being environmentally conscious.
• Operate and control motors, pumps, and valves for vapor and water treatment systems.
• Collect water samples and coordinate laboratory analysis.
• Self-perform periodic maintenance activities and manage subcontractors for specialized equipment service.
• Troubleshoot mechanical and electrical process equipment for initial diagnoses.
• Be an integral part of our safety culture, approaching all aspects of work with a safety-first attitude.
• Maintain effective communication with project team members.
• Plan and schedule work to meet required timelines.
• Manage and maintain daily operations logs, inventory, site consumables and vendor service contracts
• Available for occasional off-hour remote monitoring and call-ins to troubleshoot treatment system performance in the event of equipment failure or unforeseen shutdowns (including weekends).
• Available for a day/night shift rotation.

Your Expertise and Skills

To perform this job successfully, individuals must be able to perform each duty and responsibility satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the duties and responsibilities.

• Working knowledge of low-pressure steam boilers, water treatment equipment, and control systems
• Excellent problem-solving skills with critical thinking and mechanical/electrical systems
• Time management skills
• An ability to work autonomously as well as in a team
• Must possess a valid driver's license with a clean motor vehicle record
• Must have a reliable form of transportation to travel to job sites

Preferred Qualifications

• 1-3 years of previous experience in a similar role preferred, but not required
• OSHA 40-Hour Hazwoper

Onterris is a leading global environmental solutions company partnering with organizations to solve complex challenges where environmental pressures, regulatory expectations and operational risks intersect. Guided by our mission to advance the way of life without compromising the integrity of our environment, we believe environmental responsibility and human progress are fundamentally connected. Our scientists, engineers, field teams and consultants apply systems thinking that unites science, data and practical expertise to deliver solutions that strengthen our clients' resilience, mitigate risk and protect the air, water and soil that sustain communities, while uncovering responsible paths forward for planet and progress. For more information, visit

We are an equal opportunity employer and encourage applications from people of all backgrounds. We acknowledge that these experiences and perspectives help to enrich our teams and contribute to our ongoing success. We are committed to providing access and reasonable accommodation in our employment for all applicants. For US residents, click here to learn more.