Senior Process Engineer Metrology

Job Summary

ASML Wilton is seeking a Senior Process Engineer to join the Wilton Factory Optics team with primary ownership of interferometric metrology processes. This role is responsible for process development, stabilization, and daily performance across interferometric metrology operations. The position requires a deep technical understanding of optical fabrication, strong analytical capability, and the ability to drive sustainable improvements in a fast-paced production environment. The engineer will directly support output, yield, and quality targets including improving First Pass Yield (FPY) through stable, predictable, and well-controlled process behavior.

Job Description

The Senior Process Engineer will operate as a technical leader within Wilton Factory Optics with end-to-end ownership of interferometric metrology processes. Responsibilities include defining and optimizing process parameters, ensuring measurement stability, selecting tooling, and understanding machine behavior. The engineer will manage metrology performance, environmental control strategies, and measurement output quality while ensuring consistent behavior across tools and shifts. The metrology scope includes control of tooling, environment, fixturing, and other factors influencing surface figure and metrology output. The PE will lead the introduction and qualification of new fixtures, tools, software, and machine upgrades, and will convert interferometry, profilometry, and surface inspection data into actionable decisions. A key responsibility is establishing strong process control: defining process windows, capability targets, and long-term monitoring systems. The PE will use JMP or Minitab to identify variation, drift, and chronic stability risks, ensuring processes are robust, documented, and repeatable using SPC analysis tools. This includes maintaining process specifications, work instructions, and standard work while driving alignment across production and support teams. The engineer will collaborate daily with production technicians, supervisors, grinding and polishing teams, quality, equipment engineering, and maintenance, balancing immediate production needs with structured long-term improvement projects.

Responsibilities

• Define and optimize process parameters
• Ensure measurement stability
• Select tooling
• Understand machine behavior
• Manage metrology performance
• Ensure consistent behavior across tools and shifts
• Lead the introduction and qualification of new fixtures, tools, software, and machine upgrades
• Convert interferometry, profilometry, and surface inspection data into actionable decisions
• Establish strong process control: define process windows, capability targets, and long-term monitoring systems
• Use JMP or Minitab to identify variation, drift, and chronic stability risks
• Maintain process specifications, work instructions, and standard work
• Drive alignment across production and support teams
• Collaborate daily with production technicians, supervisors, grinding and polishing teams, quality, equipment engineering, and maintenance
• Balancing immediate production needs with structured long-term improvement projects

Education and Experience

• BS, MS, or PhD in Mechanical, Optical, Materials, or related engineering field
• Minimum 5 years of experience in optical fabrication and interferometric metrology
• Experience in tooling mechanics, metrology interpretation, and process development

Skills

• Strong understanding of interferometric metrology and tooling mechanics for accurate measurements
• Proficiency with interferometry, profilometry, and surface inspection tools
• Experience using JMP, Minitab, or equivalent statistical software
• Strong communication, cross-functional collaboration, and leadership in a production environment
• Demonstrated capability in structured problem solving, data analysis, RCA, and process improvement

Physical Requirements

• Work includes time spent on the fabrication floor, interaction with metrology equipment, and periods of standing or walking
• The role may require lifting materials up to 35 pounds
• Visual acuity for inspection tasks is required
• The environment includes exposure to noise, vibration, and manufacturing equipment while wearing appropriate PPE
• Must be willing to work in a clean room environment, wearing coveralls, hoods, booties, safety glasses and gloves for entire duration of shift

Additional Responsibilities

• Potential for exposure to strong magnetic fields, high voltage and currents
• This position requires access to controlled technology, as defined in the United States Export Administration Regulations (15 C.F.R. 730, et seq.)