Operation & Maintenance Engineer

At OVIVO Ultra Pure Water+ by Ecolab, we offer the opportunity to expand your skills and professional experience while collaborating with worldwide experts in water treatment. We are seeking motivated individuals to join our Operation & Maintenance (O&M) team for our state-of-the-art Ultra-Pure Water (UPW) system.

Joining OVIVO Ultra Pure Water+ by Ecolab means being part of a global team of innovative and passionate professionals who are committed to preserving water, our planet's most critical resource. It also means combining our efforts and talents towards a more sustainable future – together.

As an O&M Engineer
, you will undergo intensive training to operate and optimize UPW systems. You will lead and guide operators, work with a digital twin monitoring software for simulation and diagnostics and later engage for quality modelling and system optimization.

• Learn and operate UPW systems, from basic maintenance tasks to advanced troubleshooting of critical failures.
• Lead and support a team of operators in daily operations.
• Have a clear understanding of process design documents (mass balance, P&, SOO, etc).
• Use the digital twin for system simulation, diagnostics, and predictive maintenance.
• Be trained and operate complex process quality analyzers with good understanding in analytical chemistry to calibrate, maintain and troubleshoot the analyzers in terms of hardware, software, collection and analysis.
• Collaborate with internal tools for quality modelling and performance analysis.
• Maintain detailed documentation of procedures, incidents, and improvements.
• Equipment includes (but not limited to) filtration, activated carbon, ion exchange, reverse osmosis, gas transfer membrane, electro-deionization, ultrafiltration, UV treatment, etc.
• Always follow Health & Safety regulations and safe working requirements.

• The role is based at our client's facility in Chandler, AZ.
• Typical work week is from Monday to Friday.
• On-call period of 7 days every 5-6 weeks.

• Technical graduate education (Bachelor Science degree or equivalent) in Chemistry, Chemical Engineering, Mechanical Engineering, or related fields.
• Good knowledge in continuous process (gas, water, or similar fields).
• A first experience in commissioning, start-up, operation, maintenance, service, or similar.
• Ability to troubleshoot complex systems and good problem-solving skills.
• Ability to prioritize a busy workload and flexibility to adjust to rapid changes in work conditions.
• Strong interpersonal & intercultural skills and ability to work well with others.
• Capacity to take decisions and proactivity.
• Willingness to learn and apply hands-on skills.
• Good communication skills: you will be the image of the company on site and in front of the customer.

Help shape the future of water and technology by joining a team that drives innovation in ultrapure water solutions—critical to industries powering global progress. These careers offer the chance to make an impact that matters solving complex challenges, collaborating across borders, and creating solutions that protect vital resources. If you're passionate about water circularity, sustainability and technology, explore opportunities where your expertise fuels advancement and your growth is supported.

Annual or Hourly Compensation Range:

The pay range for this position is $80,000-$125,000. Many factors are taken into consideration when determining compensation, such as experience, education, training, geography, etc. We comply with all minimum wage and overtime laws.

Ecolab provides the following benefits: medical, dental, vision, life insurance, accident insurance, critical illness insurance, hospital indemnity insurance, auto insurance, home insurance, pet insurance, identity theft protection, short-term and long-term disability, 401k, pension plans, retirement health care benefits, short-term incentives, vacation (12 days), holidays, parental leave, employee stock purchase plans, on-site childcare and fitness facilities may be available at select Ecolab locations.  

for additional benefits information. If you are viewing this posting on a site other than our Ecolab Career website, view our benefits at

To meet customer requirements and comply with local or state regulations, applicants for certain customer-facing roles may need to undergo additional background screens and/or drug/alcohol testing for customer credentialing. They may also be required to be fully vaccinated for COVID-19, including a booster if eligible, unless a religious or medical accommodation is requested and approved by Ecolab.

Ecolab will provide reasonable accommodation (such as a qualified sign language interpreter or other personal assistance) with our application process upon request as required to comply with applicable laws. If you have a disability and require…