How Many People Work at Onsemi? Headcount and Employee Trends

onsemi, a global designer and manufacturer of semiconductor components, employs roughly 4,059 people across its operations. Recent staffing data shows 150 hires versus 240 recorded departures, translating to a net reduction of about 2 % of the workforce. Engineering talent represents the backbone of the company, underscoring its emphasis on product innovation in power and sensing technologies.

Engineering is the largest function at onsemi with 1,796 employees—just over 44 % of total headcount—highlighting the company’s research- and design-centric culture. Operations follows at 567 employees, supporting manufacturing and supply-chain efficiency. Business Management, Marketing & Product, and Finance & Administration each employ between 280 and 315 people, providing balance between technical and commercial capabilities. Additional teams in Sales & Support, IT, HR, and Quality round out the organization, none exceeding 7 % of total staff, while an “Other” category of 180 employees covers specialized roles.

Headquarters activity is spread across multiple U.S. technology hubs. Approximately 564 employees work in Phoenix, Arizona, the single largest named location. The company also maintains notable presences in Pocatello, Idaho (266 employees) and several Arizona cities including Chandler, Tempe, and Mesa. Smaller offices are located in San Jose, California; Gresham, Oregon; Boise, Idaho; and Portland, Oregon. A collective “Other” bucket of 2,677 employees indicates a broad footprint that includes additional domestic sites and extensive international facilities.