Staff Engineer, Ultra-Pure Water (ATA)

Amkor Technology, Inc.; Tempe (AZ); On-site; USD 110,000 - 160,000; Full time

Job summary

Amkor Technology Arizona is seeking an experienced Facilities UPW Staff Engineer to design, install, and operate Ultra-Pure Water systems (RO, EDI, DI, ultrafiltration) for our OSAT facility. The role ensures high water quality, regulatory compliance, and continuous improvement throughout project lifecycles.

You will collaborate with vendors, review drawings, support commissioning, and develop preventive maintenance plans to optimize UPW performance and system reliability in a fast-paced

Qualifications

• 8+ years of UPW systems engineering experience.
• Strong knowledge of UPW systems and water treatment technologies.
• Ability to read and interpret engineering drawings and specifications.
• Experience in semiconductor facility design, construction, commissioning, and start-up.
• Master's degree highly preferred.
• Professional Engineering License (PE) is a plus.

Responsibilities

• Collaborate with UPW design vendors to ensure system requirements and specifications are met.
• Review engineering drawings, submittals, and monitor construction progress.
• Support commissioning activities, including equipment preparation, operational testing, and system validation.
• Identify and resolve abnormalities during construction and start-up phases.
• Develop preventive maintenance programs and emergency response procedures.
• Oversee production and delivery of UPW to site production areas, ensuring system reliability and water quality standards.

Skills

UPW systems

Water treatment

Design & commissioning

Semiconductor facility

PE license

MS Office

Bluebeam

Education

Bachelor's degree in Chemical/Mechanical/Environmental/Process Engineering

Master's degree preferred

Tools

Bluebeam

Engineering tools

Job description

Requisition ID28875-Posted09/17/2026-Facilities-Regular 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 Facilities UPW Staff Engineer, responsible for the design, installation, commissioning, and ongoing operation of Ultra-Pure Water (UPW) systems for Amkor’s OSAT factory. This includes RO, EDI, DI, and ultrafiltration systems to ensure reliable and high-quality water supply for our facility. The role supports system performance, compliance, and continuous improvement throughout the project lifecycle.

Essential Duties and Responsibilities:

Responsibilities will evolve throughout the project lifecycle, ranging from design and commissioning to full-scale operations, requiring adaptability and a proactive approach to each phase.

• Collaborate with UPW design vendors to ensure system requirements and specifications are met.
• Review engineering drawings, submittals, and monitor construction progress.
• Support commissioning activities, including equipment preparation, operational testing, and system validation.
• Identify and resolve abnormalities during construction and start-up phases.
• Manage documentation, manuals, and handover processes for UPW systems.
• Conduct training and on-the-job training (OJT) for operations and maintenance teams.
• Oversee production and delivery of UPW to site production areas, ensuring system reliability and water quality standards.
• Collaborate with WWT/BRF engineering teams for integrated water management strategies.
• Develop preventive maintenance programs and emergency response procedures.
• Implement technology upgrades to improve reliability, efficiency, and sustainability.
• Perform system capacity planning, troubleshooting, and sustaining activities to meet dynamic production demands.
• Partner with operations and maintenance teams to optimize system performance and streamline maintenance strategies.
• Maintain accurate documentation for operational and maintenance procedures.
• Ensure compliance with environmental regulations and corporate standards.

Required Qualifications:

Bachelor’s degree in Chemical, Mechanical, Environmental, or Process Engineering or equivalent combination of education, certifications, and directly related experience.

• 8+ years of experience in UPW systems engineering (design and operations), preferably in semiconductor or high-tech manufacturing.
• Strong understanding of UPW systems, water treatment technologies, and industry standards.
• Ability to read and interpret engineering drawings and specifications.
• Knowledge of adjacent disciplines (automation, wastewater, gas, chemicals).
• Proficiency in MS Office, Bluebeam, and engineering tools.
• Strong analytical, decision-making, and troubleshooting skills.
• Experience in semiconductor facility design, construction, commissioning, and start-up.
• Master's degree highly preferred.
• Professional Engineering License (PE) is a plus.

Physical Requirements:

• Ability to work in various weather conditions and awkward positions.
• Regularly lift up to 50 lbs. and adjust heavy objects.
• 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:

This position will be based at the Arizona Tempe and Peoria sites during the Construction phase and will transition to Peoria for management during the Factory Operation phase.

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.