Service Engineer (Naperville)

Service Engineer

Liquid Cooling Systems – In‑Row Liquid‑to‑Liquid CDUs

Role Overview:

The Service Engineer is the highest field escalation‑level technical resource supporting OEM in‑row, liquid‑to‑liquid Coolant Distribution Units (CDUs). This role provides deep technical expertise across mechanical systems, electrical power distribution, and control platforms (PLC/HMI/BMS integration).

In addition to advanced troubleshooting and commissioning support, the Service Engineer serves as a technical authority, mentor, and trainer, enabling internal service teams and delivering customer‑facing training during deployments, handoffs, and lifecycle engagements. This role is critical to ensuring system uptime, customer confidence, and scalable service excellence.

What’s in it For You:

• 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 with a company that is passionate about your career development

• Paid training held in the field and at Nalco Water Headquarters in Naperville, IL

• Enjoy a flexible, independent work environment

• Receive a non-decaled company vehicle for business and personal use

• Comprehensive benefits package starting day 1 of employment – medical, dental, vision, matching 401(k), company paid pension, stock purchase plan, tuition reimbursement and more!

What You Will Do:

Technical Support & Escalation:

• Act as final technical escalation point for in‑row liquid‑to‑liquid CDU issues not resolved by other field technician resources

• Lead troubleshooting of complex system‑level issues involving:

  • Pumps, valves, heat exchangers, sensors, and piping

  • Power distribution, VFDs, motor protection, and grounding

  • PLC logic, HMI behavior, alarm handling, and controls interlocks

• Perform root cause analysis (RCA) for repeat or high‑impact failures and define corrective/preventive actions

• Support 24x7 escalation coverage as part of the senior on‑call rotation

Commissioning & Field Execution:

• Lead or support service engineer commissioning activities, including:

  • Pre‑functional inspections and I/O checkout

  • Control sequences verification and fail‑safe validation

  • Flow balancing, pressure validation, and heat load simulations

• Support field modifications, retrofits, and design clarifications in coordination with Engineering

• Serve as technical authority during critical customer events (first power, load ramp, incident response)

Controls & Systems Integration:

• Support and troubleshoot:

• PLC platforms (e.g., Rockwell, Siemens, Schneider)

• HMIs, firmware updates, and configuration management

• BMS, EPMS, and DCIM integrations (BACnet, Modbus, SNMP)

• Assist in defining alarm philosophy, setpoints, and service‑safe control behaviors

Training & Technical Enablement:

• Develop and deliver internal training for L1/L2 service engineers, including:

  • CDU fundamentals and system architecture

  • Troubleshooting workflows and escalation criteria

  • Safety, lock‑out/tag‑out (LOTO), and service best practices

• Deliver customer‑facing training, including:

  • Operations & maintenance (O&M) training

  • Commissioning handoff and system familiarization

  • Advanced troubleshooting workshops (where applicable)

• Contribute to training materials such as:

  • Service manuals, troubleshooting matrices, and quick‑reference guides

  • Slide decks, hands‑on lab content, and field playbooks

Documentation & Continuous Improvement:

• Provide field feedback to Engineering, Product Management, and Quality teams

• Contribute to:

  • Service procedures and preventative maintenance standards

  • Commissioning checklists and acceptance criteria

  • Failure trend analysis and reliability improvements

• Mentor junior engineers and help shape technical service standards

Location / Travel Required:

• Preferred location is U.S.; Open to candidates living anywhere in the U.S. close to a major airport

• Travel up to 75%

Minimum Qualifications:

• Associate degree (A.S.) or equivalent from a two‑year college or technical school; or seven to ten years related experience and/or training; or equivalent combination of education and experience.

• 3 years of mechanical and electrical field service equipment experience

Preferred Qualifications:

• Data center commissioning experience

• AI/HPC liquid cooling exposure

• OEM mission‑critical service background

• Familiarity with RCA/FMEA methodologies

• Bachelor’s degree in Mechanical, Electrical, or Controls Engineering (or equivalent experience)

• 7+ years field service, commissioning, or systems engineering experience

• 3+ years supporting liquid cooling systems in mission‑critical environments

About Nalco Water:

In a world with increasing water shortage and contamination challenges, Nalco Water, an Ecolab company, helps customers conserve more than 161 billion gallons of water each year. We work with customers across the world in the light industry (institutional, food & beverage, manufacturing, transportation, textile care, and global high tech) and heavy industry (chemical, downstream, paper, mining, power and primary metals industries) to reduce, reuse, and recycle their water while protecting their systems and equipment. Nalco Water provides the unique opportunity to work with a broad suite of technologies to deliver automated monitoring systems, data analysis and deep technical expertise to increase efficiency, sustainability and performance for our customers.

Anticipated Job Posting End Date:

7/1/26

Annual or Hourly Compensation Range:

The total Compensation range for this position is $93,800-$140,600 which includes base pay and target incentive based on performance, per plan terms. 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.

Benefits

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 (Full-Time Associates) , discount on day care services and caregiver services, adoption assistance, group legal services, employee assistance program, employee discount program, and education assistance program, on-Site childcare and fitness facilities may be available at select Ecolab locations Click here for additional benefits information. If you are viewing this posting on a site other than our Ecolab Career website, view our benefits at .

Potential Customer Requirements Notice

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.

- Be fully vaccinated for COVID-19, including a booster if eligible, unless a religious or medical accommodation is requested by the applicant and approved by Ecolab.

Americans with Disabilities Act (ADA)

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 accommodation assistance in this application process, please visit the Recruiting Support link in the footer of each page of our career website.

Our Commitment to a Culture of Inclusion & Belonging
At Ecolab, we believe the best teams are inclusive. We are on a journey to create a workplace where every associate can grow and achieve their best. We are committed to fair and equal treatment of associates and applicants and recruit, hire, promote, transfer and provide opportunities for advancemen]]> <