Wilton Factory Optics, Chemical Engineer

Introduction to the job

ASML US brings together creative minds in science and technology to develop lithography machines that enable the semiconductor industry to produce faster, smaller, and more energy-efficient microchips.

The Wilton Factory Optical Fabrication organization is seeking a highly motivated and technically skilled Chemical Engineer to own and optimize manufacturing chemistries used throughout the Milling and Polishing operations. This role is responsible for the development, control, qualification, and continuous improvement of coolant systems, polishing slurries, filtration practices, and fluid management processes that directly impact product quality, equipment performance, surface finish, and manufacturing efficiency.

This engineer will partner closely with Production Engineering, Production, Quality, Metrology, Environmental Health & Safety, Supply Chain, Facilities, Maintenance, and external suppliers to ensure robust, safe, and controlled chemical processes supporting world-class optics manufacturing.

CHEMICAL PROCESS OWNERSHIP

• Serve as the technical owner for coolant, slurry, and chemistry processes (including adhesives and release agents) utilized in milling, grinding, generating, and polishing operations.
• Establish, document, and maintain chemical specifications, operating windows, process controls, and reaction plans.
• Develop standard work for chemical preparation, management, replenishment, filtration, changeout, storage, and handling.
• Define contamination control requirements to protect optical quality, machine performance, tooling, and downstream process stability.

PROCESS MONITORING AND CONTROL

• Develop and maintain monitoring systems for key fluid parameters including concentration, pH, conductivity, viscosity, particle size distribution, contamination, microbial growth, and filtration effectiveness.
• Implement SPC and process health monitoring to detect drift before product quality or equipment performance is impacted.
• Analyze trend data and lead corrective actions to maintain stable, capable, and repeatable chemical process performance.
• Define sampling plans, measurement methods, control limits, escalation triggers, and documentation requirements.

MANUFACTURING SUPPORT AND PROBLEM SOLVING

• Provide hands-on engineering support to Milling and Polishing production teams during chemical-related issues, process excursions, and equipment concerns.
• Lead root cause investigations and corrective actions related to surface defects, scratch and dig performance, corrosion, residue, contamination, chemical stability, and process repeatability.
• Partner with maintenance and facilities to improve filtration, circulation, tank cleanliness, delivery systems, and fluid reliability.
• Support rapid containment, disposition, and recovery plans when chemical process upsets occur.

CONTINUOUS IMPROVEMENT AND COST REDUCTION

• Lead projects to improve coolant and slurry life, reduce chemical consumption, minimize waste generation, and reduce operating cost.
• Evaluate new chemical formulations, additives, filtration technologies, reclaim methods, and process enhancements.
• Improve optical surface quality, tool life, uptime, and throughput through chemistry optimization and robust process control.
• Use Lean, Six Sigma, DOE, and data-driven methods to deliver measurable and sustainable process improvements.

SUPPLIER, MATERIAL, AND CHANGE MANAGEMENT

• Collaborate with chemical suppliers to qualify new materials and ensure consistent raw material quality.
• Establish incoming quality requirements, certificates of analysis expectations, and supplier performance metrics for critical process chemistries.
• Lead qualification activities for alternate suppliers, new chemical formulations, formulation changes, and process fluid substitutions.
• Support procurement, inventory management, shelf-life control, and risk mitigation for critical chemicals and consumables.

ENVIRONMENTAL, HEALTH, AND SAFETY

• Champion a safety-first culture and ensure chemical handling, storage, transportation, and disposal practices meet EHS requirements.
• Partner with EHS to maintain SDS documentation, chemical risk assessments, PPE requirements, and regulatory compliance.
• Support waste reduction, chemical exposure reduction, spill prevention, and sustainability initiatives across the operation.
• Train operators, technicians, and engineers on safe and controlled chemical management practices.

• Bachelor's degree in Chemical Engineering, Chemistry, or a related technical discipline.
• Minimum of 5 years of experience in manufacturing, process engineering, chemical process development, industrial fluid management, or a related technical environment.
• Experience with industrial coolants, polishing slurries, process fluids, cleaning chemistries, and chemical delivery systems.
• Strong understanding of fluid chemistry, contamination control, filtration, chemical compatibility, and process monitoring methods.
• Experience applying SPC, statistical analysis,…