Company Insights
Published on
July 11, 2025

How Many People Work at Lumentum? Headcount and Employee Trends

Total Employees
800
7.2% from last year
76
New Hires (YTD)
54
5% of total workforce
Departments
17
650 in Engineering
Locations
18
5,012 in New York, NY

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.

Lumentum Headcount Breakdown by Department

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.

Engineering
374
Business Management
101
Operations
82
Finance and Administration
56
Marketing and Product
55
Sales and Support
38
Human Resources
32
Information Technology
20
Quality
16
Other
26

Lumentum Employees by Location

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.

San Jose, CA
249
Ottawa, ON, Canada
49
Fremont, CA
28
Milpitas, CA
29
Santa Clara, CA
19
Bangkok, Thailand
17
Sunnyvale, CA
13
Shenzhen, China
10
Campinas, Brazil
9
Other
377
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