Senior Principal Applications Engineer – Mass Spectrometry
Milpitas, California (100% Onsite)
Full Time
Travel: Up to 30% Domestic & International

The Senior Principal Applications Engineer will lead customer application development around next-generation Mass Spectrometry solutions supporting Semiconductor Manufacturing. This role partners closely with Engineering, Product Management, Sales, Marketing, and Customers to develop application-specific solutions, perform customer demonstrations, support semiconductor evaluations, and contribute to future product roadmaps.
Key Responsibilities

• Develop application-specific Mass Spectrometry solutions.
• Support Semiconductor OEM and Fab evaluations.
• Configure, calibrate, validate, and test analytical instruments.
• Perform onsite installation, debugging, and performance analysis.
• Deliver customer demonstrations and technical presentations.
• Conduct operational training for customers.
• Analyze customer samples and prepare technical reports.
• Support new product introductions and product roadmap planning.
• Work closely with Engineering, Sales, Marketing, and Product teams.
• Build strong customer relationships through technical leadership.
• Support semiconductor process monitoring applications.
• Travel up to 30% domestically and internationally.

Required Qualifications

• Master's Degree in Physics, Chemistry, Electrical Engineering, or related discipline.
• 6+ years of Applications Engineering experience.
• Hands-on experience with Mass Spectrometry solutions.
• Experience with analytical instrumentation including:
  • Mass Spectrometers
  • Gas Analyzers
• Experience with Mass Spectrometric Residual Gas Analysis (RGA).
• Familiarity with Semiconductor Manufacturing processes including:
  • Etch
  • CVD
  • ALD
• Experience configuring, calibrating, validating, and troubleshooting analytical instruments.
• Strong customer-facing presentation and demonstration experience.
• Excellent communication skills.
• Willingness to travel up to 30%.

Preferred Qualifications

• Knowledge of PLC hardware.
• Python scripting.
• LabVIEW.
• Semiconductor process monitoring.
• Product Introduction (NPI).
• Prototype evaluation.
• System-level debugging.
• Product roadmap development.
• Collaborative team environment experience.

Recruiter Submission Template –

Full Name:
Highest Degree (Bachelor's/Master's) – University & Completion Year:
Total Years of Applications Engineering Experience:
Do you have hands-on experience with analytical instrumentation such as Mass Spectrometers and Gas Analyzers? (Yes/No – Details):
Do you have experience with Mass Spectrometric Residual Gas Analysis (RGA) and semiconductor process monitoring? (Yes/No – Details):
Do you have experience supporting Semiconductor Manufacturing processes such as Etch, CVD, or ALD? (Yes/No – Details):
Do you have experience supporting Semiconductor OEMs or Fabs? (Yes/No – Details):
Do you have experience with instrument configuration, calibration, validation, and performance testing? (Yes/No – Details):
Do you have customer-facing experience including technical presentations and product demonstrations? (Yes/No – Details):
Are you willing to travel up to 30% domestically and internationally? (Yes/No):
Motivation / Reason for interest in this opportunity:
Work Authorization (US Citizen / Green Card Holder):
Expected Salary:
Notice Period / Earliest Joining Date:
Contact Number:
Email ID:
LinkedIn Profile URL:
Full Address (Street, City, State, ZIP Code):
Are you willing to work 100% onsite in Milpitas, CA? (Yes/No):