Staff Mechanical Engineer

Job Title

Staff Mechanical Engineer

Role Summary

Lead mechanical design and development for next-generation 1.6T and 2.4T optical transceiver modules for high-speed data center and AI applications. Provide technical leadership across concept, detailed design, prototyping, qualification, mass production, and customer support.

Experience Level

Senior level - typically 6+ years of relevant mechanical design and product development experience in optical transceivers or precision electronic products.

Responsibilities

Accountable for mechanical architecture, design quality, manufacturability, and cross-functional delivery for high-density, high-power optical modules.

• Lead mechanical architecture and detailed design for 1.6T and 2.4T transceiver modules and high-density form factors (e.g., OSFP).
• Develop mechanical solutions to meet optical, electrical, thermal, and high-speed signal integrity requirements.
• Design and optimize housings, cages, heat sinks, optical receptacles, pull-tabs, internal brackets, shields, gaskets, and sealing structures.
• Perform thermal design and analysis for high-power DSP, PIC, TIA, lasers, and other components.
• Perform tolerance stack-up analysis to ensure fit, alignment, assembly, and optical coupling performance.
• Specify and validate EMI shielding, ESD protection, environmental sealing, contamination controls, and shock/vibration resistance.
• Drive DFM/DFA activities and collaborate with manufacturing, process engineering, quality, reliability, and suppliers to ensure manufacturability and schedule.
• Define and execute mechanical verification and qualification plans (dimensional inspection, thermal cycling, humidity, shock/vibration, insertion/withdrawal, pull-tab durability, etc.).
• Lead failure analysis, root-cause identification, and corrective/preventive actions.
• Review and approve 2D drawings, 3D models, specifications, tolerances, and engineering changes; mentor mechanical engineers and lead technical reviews.

Requirements

Required skills and experience for immediate contribution.

Must-have:

• 6+ years designing mechanical components for optical transceivers, high-speed communication modules, optoelectronic packages, or precision electronic products.
• Proven experience with high-density, high-power module development (preferably 800G, 1.6T, or 2.4T).
• Strong knowledge of mechanical design, material selection, tolerance analysis, GD&T, thermal management, and reliability engineering.
• Proficiency with 3D CAD (Creo, SolidWorks, NX, or equivalent) and 2D drawing/documentation practices.
• Experience with manufacturing processes: plastic injection molding, die casting, CNC machining, stamping, sheet metal, adhesives, gaskets, and supplier/tooling management.
• Experience leading projects from concept through mass production and collaborating cross-functionally.
• Strong problem-solving, presentation, and cross-functional communication skills; effective written and spoken English.

Preferred / Nice-to-have:

• Experience with OSFP, QSFP-DD, or other pluggable optical transceiver form factors.
• Experience with optical alignment, fiber-optic connector structures, TOSA/ROSA packaging, and optoelectronic assembly.
• Familiarity with EMI/EMC shielding, ESD control, environmental sealing, and contamination control strategies.
• Experience with thermal simulation tools (FloTHERM, Icepak, ANSYS, or equivalent).
• Experience with reliability testing, failure analysis, and statistical/tolerance analysis.
• Experience working with global customers and international suppliers; prior technical leadership and mentoring experience.

Education Requirements

Bachelor's or Master's degree in Mechanical Engineering, Mechatronics, Manufacturing Engineering, or a related engineering field.

About the Company

Company: Lumentum

Headquarters: Milpitas, California, United States

Lumentum develops optical and photonic products and subsystems for telecommunications, data centers, cloud computing and industrial applications, providing lasers, modulators, transceivers and test solutions that enable high-speed networking and advanced photonics.