Senior Water Treatment Operator

We are seeking an experienced and highly motivated Facilities Water Treatment Specialist, to oversee and direct the preventive maintenance program for our facility water treatment systems and infrastructure. This position is responsible for providing operation, monitoring, maintenance, and adjustment of water treatment equipment and systems, including water treatment for chillers, RO (Reverse Osmosis) humidifiers, boiler treatment, water softeners, and deionized (DI) water systems, ensuring water quality and compliance with safety standards.

• Monitor and maintain chiller treatment, RO humidification systems, water softeners, boiler treatment, and DI systems for optimal performance.
• Test and record water quality parameters, including hardness, pH, conductivity, and chemical concentrations.
• Adjust chemical dosages and system settings to maintain specified water quality levels.
• Conduct regular inspections, preventive maintenance, and repairs on water treatment equipment.
• Troubleshoot system problems and perform corrective actions.
• Maintain accurate logs, records, and documentation for compliance and reporting.
• Manage inventory of treatment chemicals and supplies.
• Adhere to safety, environmental, and regulatory guidelines.
• Communicate effectively with facility management regarding system status and maintenance needs.

• Must be able to obtain a TS/SCI Poly clearance
• Minimum 3-5 years of experience performing maintenance, troubleshooting, and repair of water treatment systems in commercial, industrial, mission-critical, or facilities environments.
• High school diploma or equivalent (associate’s degree or technical training in water treatment preferred)
• Experience with water treatment systems, especially chillers, RO, softeners, boilers, and DI systems
• Strong analytical and problem-solving skills
• Ability to follow standard operating procedures and safety protocols
• Good written and verbal communication skills

• Associate’s degree or technical training in water treatment preferred
• Certified Water Treatment Operator
• Chiller water treatment knowledge

• Ability to lift up to 50 lbs.
• Ability to stand, walk, bend, and reach for extended periods
• Work in varying environmental conditions (hot, cold, wet, or noisy areas)

Original Posting:

August 6, 2026

Pay Range -

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit

• Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement.

More details are available at

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.