Job Description

onsemi is seeking a Water Engineer - Central Utility Plant (CPU) for our Hopewell Junction, New York site. The Water Engineer is responsible for the technical ownership, reliability, optimization, and compliance of all water treatment and distribution systems supporting a 300mm semiconductor fabrication facility. This role ensures continuous delivery of ultrapure water (UPW), and associated utility systems required to maintain uninterrupted semiconductor manufacturing operations.

The Water Engineer partners with Facilities Operations, Process Engineering, Equipment Engineering, EHS, Quality, and external vendors to drive system reliability, reduce operating costs, improve sustainability, and support capacity expansion projects.

Responsibilities

RESPONSIBILITIES

Water System Ownership

Own site water systems: UPW, RO, DIW, industrial, potable, and chemical delivery systems

Reliability & Operations

Develop and execute reliability strategies
Improve availability, capacity, quality, and cost
Lead troubleshooting and support 24/7 operations

Water Quality Management

Ensure compliance with semiconductor water specs
Monitor key metrics: resistivity, TOC, silica, DO, particles, microbes
Investigate excursions and implement corrective actions

Continuous Improvement

Reduce water, chemical, energy use, and waste
Lead sustainability and water reuse initiatives
Perform root cause analysis (8D, RCA, FMEA, etc.)

Maintenance Strategy

Define PM programs and optimize predictive maintenance
Track MTBF, MTTR, availability, and cost
Manage spare parts and critical inventory

Project Engineering

Lead system upgrades and capacity expansions
Manage scope, schedule, budget, and contractors
Review designs, P&IDs, and construction packages

Compliance

Ensure EPA, local, and wastewater permit compliance
Support audits and maintain documentation

Data & Reporting

Monitor systems via SCADA/facility systems
Develop KPIs and dashboards
Report performance to leadership

Key KPIs

UPW availability ≥ 99.9%
Zero water quality excursions and permit violations
Improve the reuse rate, reduce consumption, and lower costs
Improve MTBF, reduce MTTR

Qualifications

Required Qualifications

Education

Bachelor’s Degree in: Chemical Engineering, Environmental Engineering, Mechanical Engineering, Civil Engineering, or Related Engineering Discipline

Experience

3+ years of experience in: Semiconductor Facilities in Water Treatment Systems, Industrial Utilities, Central Utility Plant Operations

Technical Knowledge

Strong knowledge of: UPW Systems, RO Membrane Systems, Ion Exchange Technologies, Chemical Treatment Processes, SCADA Systems, PLC Controls, Semiconductor Utility Requirements, Water Chemistry

Preferred Qualifications

Experience supporting a 300mm semiconductor fab, Experience with advanced UPW systems in high-volume manufacturing, Professional Engineer (PE) license, Six Sigma Green Belt or Black Belt, Project Management experience, Knowledge of sustainability and water reclamation programs.

Salary: onsemi is excited to share the base salary range for this position is $75.300 to $120,400 exclusive of fringe benefits or potential bonuses. The final pay rate for the successful candidate will depend on geographic location, skills, education, experience, and/or consideration of the internal equity of our current team members. We also offer a competitive benefits package. https://www.onsemi.com/site/pdf/Benefits-Summary-USA.pdf

About Us

onsemi (Nasdaq: ON) is driving disruptive innovations to help build a better future. With a focus on automotive and industrial end-markets, the company is accelerating change in megatrends such as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. With a highly differentiated and innovative product portfolio, onsemi creates intelligent power and sensing technologies that solve the world’s most complex challenges and leads the way in creating a safer, cleaner, and smarter world.

More details about our company benefits can be found here:

https://www.onsemi.com/careers/career-benefits

About The Team

We are committed to sourcing, attracting, and hiring high-performance innovators, while providing all candidates a positive recruitment experience that builds our brand as a great place to work.

onsemi is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, ethnicity, color, religion, ancestry, national origin, age, marital status, pregnancy, sex, sexual orientation, physical or mental disability, medical condition, genetic information, military or veteran status, gender identity, gender expression, or any other protected category under applicable federal, state, or local laws.

If you are an individual with a disability and require a reasonable accommodation to complete any part of the application process, or are limited in the ability or unable to access or use this online application process and need an alternative method for applying, you may contact Talent.acquisition@onsemi.com for assistance.

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Water Engineer – Central Utility Plant (CPU)