onsemi designs and manufactures power and sensing semiconductor solutions used in automotive, industrial, and cloud infrastructure applications. The organization currently tracks 4,059 employees and has added 160 new hires while experiencing 256 departures in the most recent reporting period. This activity points to measured growth and a manageable level of turnover as the company continues to scale its production and R&D capacity.
Engineering represents onsemi’s largest talent pool with 1,796 employees, accounting for roughly two-fifths of the company’s workforce and underscoring its focus on product development and process technology. Operations follows with 567 employees who support fabrication, assembly, and logistics. Business Management (315) and Marketing & Product (296) provide commercial direction, while Finance & Administration (280) and Sales & Support (279) round out the customer-facing and governance functions. Smaller yet essential groups include Information Technology (155), Human Resources (108), and Quality (83). An additional 180 professionals are classified in specialized or cross-functional roles.
The company’s headquarters region in Phoenix, Arizona, hosts the largest single site at 325 employees. Pocatello, Idaho—a long-standing wafer fabrication center—accounts for 266 employees. onsemi maintains several satellite offices and manufacturing operations throughout Arizona, including Scottsdale (93), Chandler (83), Tempe (71), and Mesa (68). Silicon Valley activities are concentrated in San Jose with 92 employees, while Gresham, Oregon supports 84 staff in another fabrication facility. Boise, Idaho adds 64 employees to the regional footprint. The remaining 2,913 employees work across a network of additional U.S. and international locations that support design, manufacturing, and customer engagement functions.