How Many People Work at Lumentum? Headcount and Employee Trends

Lumentum is an optical and photonics technology company serving telecommunications and industrial customers. The firm employs about 800 people worldwide. Recent staffing data shows 51 additions and 57 departures, indicating a largely stable workforce size. Its talent footprint spans engineering, corporate, and manufacturing roles spread across North America and Asia.

Engineering is Lumentum’s largest discipline with 374 employees—just under half of the entire organization—highlighting the company’s product-development focus. Business Management (101) and Operations (82) form the next-largest groups, supporting strategy and day-to-day execution. Finance & Administration (56), Marketing & Product (55), and Sales & Support (38) provide commercial and back-office coverage, while Human Resources (32), Information Technology (20), and Quality (16) round out the specialized functions. The balanced mix indicates a mature organizational structure that pairs strong technical depth with the necessary corporate support teams.

Employee data shows the greatest concentration in California, led by San Jose with 150 team members and the broader San Francisco Bay Area with 99. Additional U.S. hubs include Milpitas (29), Fremont (28), Santa Clara (19), and Sunnyvale (13). Ottawa, Ontario hosts 49 employees, reflecting Lumentum’s Canadian R&D presence. In Asia, Bangkok and Pathum Thani, Thailand contribute a combined 33 employees, supporting manufacturing and supply-chain operations. An "Other" category of 380 staff represents smaller satellite sites and remote employees, underscoring the company’s globally distributed model.