Lumentum designs and manufactures optical and photonics products for communications, industrial and consumer markets. The company maintains a workforce of about 800 employees and has recorded recent hiring of roughly 7 % of staff alongside attrition of just under 10 %, resulting in a modest net decrease in overall headcount. Engineering talent makes up the largest share of employees, reflecting Lumentum’s emphasis on research, development and manufacturing expertise. The organization spans multiple North American and international sites while keeping its corporate base in Silicon Valley.
Engineering is the largest group with 374 employees—nearly half of the total workforce—underscoring the company’s technology-centric operations. Business Management follows with 101 employees, supporting strategic planning, program management and corporate governance. Operations (82 employees) and Finance & Administration (56 employees) provide the backbone for production, supply-chain, accounting and compliance activities. Marketing & Product (55) and Sales & Support (38) focus on go-to-market execution, while Human Resources (32) and Information Technology (20) sustain internal capabilities. Smaller teams in Quality (16) and Other functions (26) round out the organization, creating a balanced structure that supports product innovation and global delivery.
Lumentum’s headquarters in San Jose, California, accounts for 249 employees, making it the single largest site. The company maintains a concentrated presence across the broader Bay Area—with additional teams in Fremont, Milpitas, Santa Clara and Sunnyvale—bringing the region’s total to roughly 338 employees. Beyond Silicon Valley, notable hubs include Ottawa, Ontario (49 employees) for R&D and engineering, and Bangkok, Thailand (17) which provides an Asia-Pacific foothold. Smaller groups operate in Shenzhen, China (10) and Campinas, Brazil (9), while the “Other” category represents 377 employees distributed across additional manufacturing, service and remote locations worldwide. This geographic mix enables Lumentum to serve global customers while keeping core functions close to key talent pools and manufacturing partners.