Sr. Facilities UPW Technician

Amkor Technology, Inc.; Peoria (AZ); On-site; USD 75,000 - 93,000; Full time

Job summary

Amkor Technology, Inc. in Peoria, AZ is seeking an experienced Senior Facilities UPW Technician to operate and maintain the site’s ultra-pure water production and distribution systems.

You will support startup, shutdown, and optimization of UPW processes to ensure high-purity water for manufacturing and facility operations. The role emphasizes troubleshooting, PMs on membranes and filtration equipment, and working with engineers and vendors to improve system reliability and water quality, with

Qualifications

• UPW process knowledge and experience with water systems.
• Ability to read P&IDs and system diagrams.
• Experience with monitoring equipment and water quality testing.

Responsibilities

• Operate, monitor, and maintain UPW production and distribution systems.
• Design and optimize UPW equipment and distribution loops.
• Log data and monitor resistivity, TOC, pH, DO, and silica.
• Troubleshoot alarms and deviations from specifications.
• Assist with commissioning and equipment qualification.
• Follow hazmat handling, PPE, spill response, and chemical storage SOPs.
• Collaborate with engineers and vendors to improve efficiency and water quality.

Skills

UPW knowledge

P&ID interpretation

SCADA familiarity

Troubleshooting

Data logging

Education

High School Diploma

Technical College/Trade Program

Tools

SCADA

RO/EDI/UF membranes

UV equipment

Job description

Career Opportunities: Sr. Facilities UPW Technician (29055)

Requisition ID29055-Posted07/28/2026-Facilities-Regular Non-Exempt Full-Time Employee

Amkor Technology, Inc. (Nasdaq: AMKR) is the world’s largest U.S. headquartered OSAT and is a global leader in outsourced semiconductor packaging and test services. With a strong track record of innovation, a broad and diverse geographic footprint and solid partnerships with lead customers, Amkor delivers high-quality solutions that enable the world’s leading semiconductor and electronics companies to bring advanced technologies to market. The company’s comprehensive portfolio includes advanced packaging, wafer-level processing, and system-in-package solutions targeting applications for smartphones, data centers, artificial intelligence, automobiles and wearables. For more information visit amkor.com .

Position Summary:
Amkor Technology Arizona is seeking an experienced SeniorFacilities Ultra-Pure Water (UPW) Technician, responsible for operating, monitoring, maintaining, and troubleshooting the site’s UPW production and distribution systems. This role ensures continuous supply of high‑purity water required for manufacturing and facility processes. The technician supports system startup, shutdown, maintenance, and optimization while ensuring all UPW equipment operates safely, efficiently, and within strict quality specifications.

Job Responsibilities:

• Design implementation standards for UPW production equipment including multimedia filters, activated carbon beds, softeners, ultrafiltration (UF) units, reverse osmosis (RO) skids, EDI units, UVs, de-gasifiers, and polishing loops.
• Develop stable UPW distribution systems including storage tanks, recirculation loops, pumps, valves, flow control devices, and point‑of‑use (POU) instrumentation.
• Build routine system rounds, data logging, trend monitoring. Regularly monitor UPW quality parameters such as resistivity, TOC, dissolved oxygen (DO), silica, pH, and particles
• Advanced troubleshooting when responding to alarms and deviations from specifications
• Develop and maintain calibrate UPW treatment processes for analytical instruments.
• Perform scheduled PMs on filters, membranes, dosing systems, pumps, valves, sensors, strainers, and instrumentation associated with UPW production and filtration systems.
• Troubleshoot equipment failures, system trips, abnormal readings, or flow/pressure issues.
• Develop systems for membrane cleaning procedures (CIP), resin changeouts, pre‑filter swaps, and chemical cleaning operations.
• Build SOP for proper hazmat handling, PPE requirements, spill response, and chemical storage
• Implement dosing systems and ensure chemical feed equipment functions correctly.
• Assist with commissioning of new UPW equipment or system expansions, including loop sanitization, equipment qualification, and performance testing.
• Work with engineers and vendors to improve system efficiency, reliability, and water quality performance.

Qualifications

• High School Diploma required; Technical College or Trade Program preferred.
• 3+ years of experience with UPW, water treatment, or industrial water systems (RO, UF, EDI, filtration).
• Knowledge of water treatment processes, water chemistry, and high‑purity water system requirements.
• Ability to read and understand P&IDs, system flow diagrams, and equipment manuals.
• Experience using test instruments and monitoring equipment related to water quality.
• Ability to work in mechanical spaces, tanks, utility areas, and water treatment rooms.
• Certification in water treatment operations or related technical training.
• Familiarity with BMS or SCADA systems used for UPW monitoring and control.
• Experience with membrane systems (UF/RO/EDI) and distribution loop design.

Physical Requirements:

Ability to work in various weather conditions and awkward positions.

Ability tolift upto 50lbsand work in mechanical spaces, rooftops, and equipment rooms.

Exposure to sharp, hot, and cold equipment.

Must be medically qualified to wear a respirator.

Ability to climb ladders, work at elevation, and in confined spaces with PPE

Location:

Peoria, AZ. This position is onsite. During the construction phase and initial onboarding period, employees will work a standard Monday–Friday schedule of 8:00 a.m. to 5:00 p.m. As the facility transitions into manufacturing operations, the role will move to a 12-hour compressed workweek schedule. Shift assignments may include day or night shifts, weekends, and holidays, and will be determined based based on business and operational needs.

Amkor is proud to be an Equal Opportunity Employer. We do not discriminate on the basis of race, color, ancestry, national origin, religion or religious creed, mental or physical disability, medical condition, genetic information, sex (including pregnancy, childbirth, and related medical conditions), sexual orientation, gender identity, gender expression, age, marital status, military or veteran status, citizenship, or other characteristics protected by state or federal law or local ordinance.