Engineer Principal, Mechanical

Lumentum; Hong Kong; On-site; HKD 900,000 - 1,500,000; Full time

Job summary

Lumentum is seeking an experienced Engineer Principal, Mechanical to lead the design, development and optimization of complex opto-mechanical systems for our cutting-edge optical products. This role involves driving advanced mechanical engineering solutions from concept to production, ensuring robust performance, reliability, and manufacturability.

You will collaborate with optical, electrical, and manufacturing teams, mentor engineers, and guide design validation and qualification efforts to

Qualifications

• Master's degree in Mechanical Engineering or related field; Ph.D. preferred.
• 10+ years in mechanical design and analysis, preferably in optical/high-tech manufacturing.
• Expert in 3D CAD and PDM/PLM systems (SolidWorks emphasis).
• Strong experience with ANSYS and CFD/thermal analysis tools.
• Knowledge of materials, heat transfer, vibrations, and precision design.
• Experience with DFM/ DFA/ DFR principles.
• Proven ability to lead projects and mentor teams.
• Excellent communication and presentation skills.
• Experience in optical alignment/packaging is a plus.

Responsibilities

• Lead mechanical design and analysis of opto-mechanical assemblies for new product introductions and enhancements.
• Perform FEA, CFD, and tolerance analyses to ensure performance and reliability.
• Develop detailed mechanical specs, documentation, and test plans.
• Collaborate with optical, electrical, manufacturing and program management teams.
• Mentor junior engineers and provide technical guidance within the team.
• Drive material/component selection and qualification for manufacturability.
• Identify innovative mechanical solutions to improve performance and cost.
• Oversee design validation and prototype testing and failure analysis.
• Stay current with industry trends and best practices in mechanical and optical systems.

Skills

Mechanical design

Finite Element Analysis

CFD

3D CAD (SolidWorks)

PDM/PLM

DFM/DFA/DFR

Mentoring

Project leadership

Optical alignment

Communication

Education

Master's degree in Mechanical Engineering

Ph.D. preferred

Tools

SolidWorks

ANSYS

FLOTHERM

PDM/PLM systems

Job description

It's fun to work in a company where people truly BELIEVE in what they're doing!

We're committed to bringing passion and customer focus to the business.

If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!

Lumentum is seeking a highly experienced and innovative Engineer Principal, Mechanical to lead the design, development, and optimization of complex mechanical systems for our cutting-edge optical products. This role involves driving advanced mechanical engineering solutions from concept to production, ensuring robust performance, reliability, and manufacturability.

Key Responsibilities

• Lead the mechanical design and analysis of opto-mechanical assemblies, modules, and systems for new product introduction and existing product enhancements.
• Conduct advanced engineering analysis, including FEA (stress, thermal, vibration), CFD, and tolerance analysis, to ensure design integrity and performance.
• Develop detailed mechanical specifications, design documentation, and test plans.
• Collaborate closely with cross-functional teams including optical engineers, electrical engineers, manufacturing engineers, and program managers to define requirements, integrate designs, and troubleshoot issues.
• Mentor junior engineers and provide technical guidance within the mechanical engineering team.
• Drive the selection and qualification of materials, components, and manufacturing processes.
• Identify and implement innovative mechanical solutions to improve product performance, cost-effectiveness, and manufacturability.
• Oversee design validation and verification activities, including prototype testing and failure analysis.
• Stay abreast of industry trends, new technologies, and best practices in mechanical engineering and optical systems.

Required Qualifications

• Master's degree in Mechanical Engineering or a related field; Ph.D. preferred.
• 10+ years of progressive experience in mechanical design and analysis, preferably within the optical, semiconductor, or high‑tech manufacturing industries.
• Expert proficiency with 3D CAD software (e.g., SolidWorks) and PDM/PLM systems.
• Demonstrated expertise in advanced FEA and CFD tools (e.g., ANSYS, FLOTHERM).
• Strong understanding of material science, heat transfer, vibrations, and precision mechanical design principles.
• Experience with design for manufacturability (DFM), design for assembly (DFA), and design for reliability (DFR).
• Proven ability to lead complex technical projects and mentor engineering teams.
• Excellent problem‑solving skills and a strong analytical mindset.
• Exceptional communication, interpersonal, and presentation skills.
• Experience with optical alignment and packaging techniques is a significant advantage.

We are an equal opportunity employer and value diversity at our company.

We do not discriminate on the basis of race, religion, color, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status.

We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment.

Please contact us to request accommodation.