Staff Engineer, Ultra-Pure Water; ATA)

Requisition
28875
-Posted
09/17/2026

- 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  .

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…