Engineer II, Mechanical Engineering

Entegris, Inc.; San Luis Obispo (CA); On-site; USD 95,000 - 100,000; Full time

Benefits offered by this job

Generous 401(k) match

Health, dental, vision insurance

Flexible schedule

11 paid holidays

PTO policy

Job summary

Entegris is seeking a Mechanical Engineer II at our San Luis Obispo, CA location to design and improve pressure vessels used in high-purity semiconductor purification systems. You will collaborate with R&D, Manufacturing, and Quality to deliver reliable products, perform stress analyses, and create detailed documentation.

Responsibilities include leading POU vessel designs, selecting filtration media, and ensuring compliance with ASME codes.

Qualifications

• Bachelor’s degree in Mechanical Engineering, Materials Engineering, or related discipline.
• 2–4 years of professional engineering experience with pressure equipment or vessel design.
• Experience with 3D modeling and 2D drafting using SolidWorks or CAD; PLM systems are a plus.
• Deep understanding of mechanical assembly techniques, welding design, weld callouts, and bolted joints.
• Ability to perform manual and software-assisted stress calculations for pressurized equipment.
• Familiarity with ASME Section VIII or similar pressure vessel codes preferred.
• Experience with filtration media, fluid dynamics, or high-purity gas/liquid systems is advantageous.
• Hands-on mindset with troubleshooting manufacturing and production issues.
• Excellent verbal and written communication for cross-functional collaboration.

Responsibilities

• Lead the mechanical design of Point of Use (POU) pressure vessels for high-purity media.
• Partner with R&D to determine media types, form factors, and geometry for new purifiers.
• Evaluate and select filtration media to meet pressure drop and flow requirements.
• Design robust joints, focusing on welding specifications and bolted assemblies.
• Spend time on the manufacturing floor to learn orbital and lathe welding.
• Perform stress calculations to ensure safety and compliance with standards (ASME BPVC).
• Create 3D models, 2D drawings, and BOMs using SolidWorks.
• Act as liaison to manufacturing, troubleshooting production issues for on-time delivery.
• Participate in design reviews, process improvements, and change control for manufacturability.
• Maintain a healthy and safe work environment for all employees.

Skills

SolidWorks

3D modeling

CAD

Welding design

Stress analysis

ASME codes

Cross-functional teamwork

Education

Bachelor’s degree in Mechanical Engineering, Materials Engineering, or related discipline

Tools

PDM/PLM systems

Job description

Job Title

Engineer II, Mechanical Engineering

Job Description

The Role Entegris is currently seeking a Mechanical Engineer II to join our Engineering team at our San Luis Obispo, California location. The Mechanical Engineer II is responsiblefor the design, development, and continuous improvement of pressure vessels used in high-purity semiconductor purification systems. This role partners closely with R&D, Manufacturing, and Quality teams to develop new products, perform stress analysis, create detailed engineering documentation, support production troubleshooting, and ensure designs meet safety, performance, and industry compliance requirements. The position combines hands‑on manufacturing engagement with mechanical design expertise to deliver reliable, high‑quality products.

What You’ll Do

• Lead the mechanical design of Point of Use (POU) pressure vessels used for containing high-purity purification media.
• Partner closely with the Research & Development team to determine optimal media types, form factors, and geometric requirements for new purifier products.
• Evaluate and select appropriate filtration media to meet pressure drop, flow rate, and contamination control requirements.
• Design robust joints for pressure vessels, with a heavy emphasis on both welding specifications and bolted joint assemblies.
• Spend dedicated time on the manufacturing floor learning orbital and lathe welding.
• Conduct, analyze, and document pressure vessel stress calculations to ensure safety, reliability, and compliance with internal and external standards (e.g., ASME BPVC).
• Utilize SolidWorks to create 3D models, detailed 2D manufacturing drawings, and complete Bills of Materials (BOMs).
• Act as an engineering liaison to the manufacturing floor, assisting in the troubleshooting of production issues to ensure on‑time delivery.
• Participate in design reviews, process improvements, and change control processes to improve manufacturability and product performance.
• Create a healthy and safe work environment for all employees.
• Any other duties as assigned.

What We Seek

• Bachelor’s degree in Mechanical Engineering, Materials Engineering, or a closely related discipline.
• 2 to 4 years of professional engineering experience with a direct focus on pressure equipment or pressure vessel design.
• Demonstrated experience in 3D modeling and 2D drafting using SolidWorks or other CAD programs. (Experience with PDM/PLM systems is a plus).
• Deep understanding of mechanical assembly techniques, specifically structural welding design, weld callouts, and bolted joint engineering.
• Proven ability to perform manual and software-assisted stress calculations for pressurized equipment.
• Familiarity with ASME Section VIII or similar pressure vessel codes is highly preferred.
• Previous experience with filtration media, fluid dynamics, or high‑purity gas/liquid systems is a strong advantage.
• Hands‑on mindset with a track record of successfully troubleshooting mechanical manufacturing and production issues.
• Excellent verbal and written communication skills with the ability to work cross‑functionally with R&D, Quality, and Manufacturing teams.

Why Work at Entegris Lead. Inspire. Innovate. Define Your Future.

Not everyone who works for a global company shares the same background, experiences and perspectives. We leverage the differences of our employees to bring new ideas to the table. Every employee throughout the company is encouraged to share input on projects and initiatives. Our decision‑making process is truly a collaborative effort as we realize there are leaders at every level of the organization. We put our values at the core of how we operate as an organization — not just when it’s convenient, but in a lasting and meaningful way. We want the time and energy you spend here to have a positive impact on your life inside and outside of the office.

What We Offer

• Generous 401(K) plan with an impressive employer match
• Excellent health, dental and vision insurance packages to fit your needs
• Flexible work schedule and 11 paid holidays a year
• Paid time off (PTO) policy that empowers you to take the time you need to recharge
• Education assistance to support your learning journey
• Values-driven culture with colleagues that rally around People, Accountability, Creativity and Excellence
• Compensation: $95,000-100,000 per year range with actual pay dependent on candidate overall skills for the role

Immigration Sponsorship

Entegris does not provide immigration-related sponsorship for this role. Do not apply for this role if you will need Entegris immigration sponsorship (e.g., H1B, TN, STEM OPT, etc.) now or in the future.

Equal Opportunity & Diversity

At Entegris we are committed to providing equal opportunity to all employees and applicants. Our policy is to recruit, hire, train, and reward employees for their individual abilities, achievements, and experience without regard to race, color, religion, sexual orientation, age, national origin, disability, marital or military status. At Entegris, we want you to be part of our culture, which values your unique talents, skills, and experiences. We believe what we do is as important as how we do it. People at our company bring their true selves to work, and are appreciated not only for what they do, but for who they are. This plus the technical complexity of our products and solutions means you can be sure your work is both challenging and changing the world for the better. Learn more about why people enjoy working at Entegris.