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In office (Ulsan)
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 2, 2026. First seen by Alion on Sep 10, 2026. Ecolab scores B on the Alion truth index.

Overview
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Profile match
Ecolab is a water, hygiene and infection prevention company headquartered in Saint Paul, Minnesota, supplying cleaning and sanitation chemicals, water treatment programs, food safety services and pest elimination to restaurants, hotels, hospitals, food and beverage plants and heavy industry. Founded in 1923, it is a Fortune 500 company that serves customers at more than 100,000 sites worldwide and owns Nalco Water, its industrial water treatment business. Openings cover sales and territory managers, field service representatives, food safety specialists, lab and manufacturing staff, logistics associates, finance analysts and data and AI engineers.

Want to build a brighter, bolder future and cultivate your career? Join Ecolab’s team and help create a world in which we all thrive.

Nalco Water, an Ecolab company, helps customers conserve more than 161 billion gallons of water annually. We serve industries from food & beverage to mining and manufacturing, delivering innovative solutions that reduce, reuse, and recycle water while protecting systems and equipment. Our team combines deep technical expertise with smart technology to drive efficiency, sustainability, and performance.

Ecolab is seeking a Wastewater Operator to join our team and help shape a more sustainable future. As a Wastewater Operator, you’ll support onsite operations that are safe, reliable, and environmentally responsible. You’ll help our customers reduce water, energy, and natural resource consumption while improving productivity and reducing operational risk. Whether you're starting your career or looking to grow in a high-demand technical field, this is your opportunity to thrive with purpose.

How You’ll Make an Impact:

  • Be at the heart of our mission to protect vital resources.

  • Ensure the smooth operation of wastewater treatment systems, helping customers meet environmental standards and operational goals.

  • Contribute to safer workplaces, cleaner water, and more efficient industrial processes.

  • Take ownership, solve problems, and continuously improve operations - making a good system even better.

Position Details:

  • This position will be based in (CITY, STATE)

What’s Unique About This Role:

  • You’ll work with advanced monitoring systems and collaborate across departments in a high-impact, safety-first environment.

  • A chance to build a long-term technical career with access to best-in-class tools, training, and support.

Minimum Qualifications:

  • High school diploma or equivalent

  • Position requires a current and valid Driver’s License with no restrictions

  • Experience using basic hand tools

  • Experience using a computer (email, MS Office)

  • No immigration sponsorship available for this position

Physical Requirements of Position:

  • Lifting up to 50 pounds

  • Exposure to hot, cold, noisy, or dirty environments

  • Stooping, kneeling, crouching, reaching, balancing, walking, standing, climbing

  • Working indoors and outdoors in all seasons and weather conditions

Ecolab is committed to providing reasonable accommodation to qualified individuals with a disability.

Preferred Qualifications:

  • Experience working independently in an industrial setting

  • Experience in industrial wastewater treatment or maintenance, particularly with reverse osmosis or other membrane technology

  • State-level water or wastewater treatment certifications

  • Background in heavy industry (e.g., steel or metals manufacturing)

  • Familiarity with SCADA, HMI, or CMMS systems

What’s in it For You:

  • Starting on Day 1: Access to our comprehensive benefits package including medical, dental, vision, matching 401K, company-paid pension, stock purchase plan, paid parental leave, select discounted childcare resources, and more!

  • The opportunity to take on some of the world’s most meaningful challenges, helping customers achieve clean water, safe food, and healthy environments.

  • The ability to make an impact and shape your career with a company that is passionate about growth.

  • The support of an organization that believes it is vital to include and engage diverse people, perspectives, and ideas to achieve our best.

About Ecolab:

At Ecolab, we prioritize our talent-first philosophy by creating the most capable and diverse team to excel at our nearly three million customer sites. Building on a century of innovation, our 48,000 associates help deliver comprehensive science-based solutions, data-driven insights and world-class service to advance food safety, maintain clean and safe environments, and optimize water and energy use, and improve operational efficiencies and sustainability for customers in the food, healthcare, life sciences, hospitality and industrial markets in more than 170 countries around the world. Our solutions not only enhance operational efficiency but also contribute to sustainability and public health, making a positive impact on the world. We are committed to eliminating unnecessary complexities and embracing a beginner's mindset, continuously seeking new perspectives and innovative solutions to stay ahead in a rapidly changing world.

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