Senior Staff Engineer - Ultra-Pure Water

Global leader in outsourced semiconductor packaging and test services is looking for a Senior Staff Engineer – Ultra-Pure Water, to join their team!!

Top Semiconductor packaging and test company is seeking an experienced facilities UPW 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.

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.

• 5+ 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.
• Professional Engineering License (PE) is a plus.

• 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.

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