Principal Test Engineer

A Day in Your Life at MKS

As a Principal Test Engineer at MKS Inc., you will partner with Engineering, Product Development, Advanced Development, Manufacturing, Quality, Operations, and Customers to execute particle testing, provide technical leadership for particle metrology activities, and ensure the reliable operation of the particle metrology laboratory, cleanroom environment, and engineering labs. You will serve as the subject matter expert for particle measurement technologies, laboratory methods, and contamination control while driving continuous improvement in testing capability, safety, and operational excellence.

In this role, you will report to the Director of Advanced Development.

• Leading particle testing, characterization, and analysis activities supporting product development, manufacturing, customer investigations, and reliability programs.
• Managing day-to-day operations of the particle metrology laboratory, ensuring testing capabilities are available, accurate, and operating at peak performance.
• Maintaining laboratory equipment, particle counters, metrology systems, cleanroom infrastructure, and supporting systems to maximize uptime and reliability.
• Developing, validating, and continuously improving test methods, procedures, and laboratory standards to ensure accurate and repeatable results.
• Serving as the technical authority for contamination control, particle generation studies, cleanliness verification, and failure investigations.
• Supporting engineering labs, test stations, test set-up, and test plans.
• Ensuring compliance with cleanroom protocols, laboratory safety requirements, environmental regulations, and company policies.
• Leading equipment qualification, preventive maintenance, calibration programs, and laboratory expansion initiatives.
• Collaborating with engineering, manufacturing, and quality teams to identify root causes, solve complex contamination challenges, and improve product performance.

Up to 10% of travel is required.

• Bachelor's degree in Mechanical Engineering, Chemical Engineering, Materials Science, Physics, Electrical Engineering, or a related technical discipline.
• 8+ years of experience managing complex labs
• Extensive experience operating and maintaining particle metrology, contamination control, or analytical laboratory equipment.
• Demonstrated expertise in cleanroom operations, contamination control practices, and laboratory safety management.
• Experience developing, validating, and documenting test methods and measurement procedures.
• Strong troubleshooting and root cause analysis skills related to laboratory equipment, instrumentation, and contamination-related issues.
• Proven ability to lead technical projects and influence cross-functional teams.
• Strong written and verbal communication skills, including technical reporting and presentation of test results.

• Experience supporting semiconductor capital equipment, vacuum systems, gas delivery systems, plasma products, or advanced manufacturing environments.
• Knowledge of ISO cleanroom standards, contamination control methodologies, and particle measurement technologies.
• Experience with statistical data analysis, Design of Experiments (DOE), and measurement system analysis.
• Experience managing laboratory budgets, capital equipment planning, and vendor relationships.
• Familiarity with automated data acquisition systems and laboratory information management systems (LIMS).
• Experience mentoring engineers, technicians, and laboratory personnel.

Reporting Relationships:
May provide technical leadership and direction to engineers, technicians, contractors, and laboratory support personnel.

Financial Responsibilities:
Responsible for laboratory equipment investments, maintenance expenditures, calibration programs, and operational budgets associated with the particle metrology laboratory.

Ability to work within ISO-classified cleanroom environments while following gowning and contamination control procedures. Ability to stand, walk, bend, and perform laboratory activities for extended periods. Ability to…