Principal Mechanical Engineer — Opto-Mechanical Systems Lead

Cloud Light Technology Limited; Hong Kong; On-site; HKD 1,200,000 - 1,900,000; Full time

Job summary

Lumentum is seeking a highly experienced 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. You will mentor junior engineers and collaborate across optical, electrical, and manufacturing teams.

Qualifications

• Master's degree in Mechanical Engineering or related field; Ph.D. preferred.
• 10+ years of progressive mechanical design and analysis experience in optical/high-tech industries.
• Expert with 3D CAD software (SolidWorks) and PDM/PLM systems; strong FEA/CFD tooling (ANSYS, FLOTHERM).
• Deep understanding of materials, heat transfer, vibrations, and precision mechanical design.
• Proven ability to lead complex projects and mentor teams; strong communication skills.

Responsibilities

• Lead design and analysis of opto-mechanical assemblies for new products and improvements.
• Perform advanced analysis (FEA, CFD, tolerance) to ensure performance and reliability.
• Develop mechanical specs, documentation, and test plans.
• Collaborate with optical/electrical/manufacturing teams to define requirements and integrate designs.
• Mentor junior engineers and provide technical guidance within the team.
• Drive material/component selection and manufacturing process qualification.
• Identify innovative mechanical solutions to improve performance, cost, and manufacturability.
• Oversee design validation and prototype testing, plus failure analysis.
• Stay current with industry trends and best practices in mechanical and optical systems.

Skills

Leadership

Mentoring

Cross-functional collaboration

Problem solving

Communication

Education

Master's degree in Mechanical Engineering

Ph.D. preferred

Tools

SolidWorks

PDM/PLM systems

ANSYS

FLOTHERM

Job description

Lumentum is seeking a highly experienced 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. You will mentor junior engineers and collaborate across optical, electrical, and manufacturing teams.