Senior Process Engineer

Job Title

Senior Process Engineer

Role Summary

Senior/Principal Process Engineer responsible for technical ownership of die bond / die attach processes for high-precision optical and photonics manufacturing. The role leads process development, qualification, transfer to contract manufacturers, yield improvement, and production ramp.

Works cross-functionally with R&D, Quality, Operations, Supply Chain, equipment suppliers, and Contract Manufacturers to ensure manufacturing readiness and sustained production performance.

Experience Level

Senior / Principal level. Senior: typically 8+ years relevant experience. Principal: typically 10+ years with demonstrated technical leadership and ownership of complex manufacturing processes.

Responsibilities

Own and improve high-precision die bond and die attach processes from development through high-volume production.

• Develop, characterize, optimize, qualify, and sustain die bond/die attach processes; define process windows and acceptance criteria.
• Specify and control key parameters: placement/alignment accuracy, bonding force, temperature/time, bond-line thickness, materials, tooling, and collet design.
• Plan and execute NPI activities: engineering builds, First Article Inspection, process characterization, CM qualification, and manufacturing readiness.
• Transfer products to Contract Manufacturers and support production ramp and sustaining activities.
• Analyze SPC, Cp/Cpk, DOE and other statistical data to drive yield and capability improvements.
• Lead root-cause investigations and implement corrective/preventive actions using structured problem-solving methods (8D, 5-Why, Fishbone, DOE, fault-tree).
• Drive automation, cycle-time reduction, equipment optimization, and cost-reduction programs.
• Lead cross-functional projects, communicate technical risks/status, and mentor junior engineers.

Requirements

Practical manufacturing and process engineering skills specific to optoelectronics and high-precision assembly. Candidates should be able to provide hands-on support and independently resolve complex process and equipment issues.

Must-have:

• Extensive experience with die bond or die attach process development, optimization, and sustaining in precision/optical manufacturing.
• Strong manufacturing engineering experience with optoelectronic devices, optical modules, or precision assembly.
• Experience in New Product Introduction, product qualification, and transferring products into high-volume manufacturing.
• Statistical process control skills: SPC, process capability (Cp/Cpk), DOE, and statistical data analysis.
• Experience working with Contract Manufacturers, equipment suppliers, and cross-functional teams.
• Hands-on troubleshooting of process and equipment issues on the manufacturing floor.
• Good English communication skills (written and verbal) and willingness/ability to travel internationally as required.

Nice-to-have:

• Experience with laser die-to-submount assembly and active/passive alignment techniques.
• Familiarity with high-precision die bond platforms (ASM, AMICRA, Silicool, Palomar, or equivalent).
• Experience with process automation, tooling/collet design, and equipment integration.
• Experience in optical communications products, tunable lasers, transceivers, or photonic devices.

Education Requirements

Bachelor's degree or higher in Mechanical Engineering, Materials Engineering, Manufacturing Engineering, Electronics Engineering, Mechatronics, Physics, Applied Physics, or a related technical field; or equivalent practical experience. (Senior: typically 8+ years; Principal: typically 10+ years.)

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.