Administrative Assistant

onsemi is driving disruptive innovations to help build a better future—powering sustainable energy, mobility, and advanced electronics. As a global leader in semiconductor solutions, we operate in a fast-paced, high-performance environment where precision, collaboration, and professionalism are key.

About the Role

We’re seeking a highly organized, polished, and proactive Administrative Assistant with demonstrated experience in a corporate environment. In this role, you’ll provide critical support to leaders and teams in our Operations and Manufacturing organization, ensuring seamless day-to-day operations and enabling business efficiency.

This is an excellent opportunity for a detail-oriented professional who thrives in a structured, technology-driven organization and enjoys being a trusted partner to leadership.

• Provide administrative support to leaders and cross-functional teams in a corporate, global environment


• Manage complex calendars, including scheduling across multiple time zones and shifting priorities


• Coordinate domestic and international travel, including itineraries and expense reporting


• Prepare high-quality documents, presentations, and communications for business use


• Facilitate meetings, including logistics, agendas, and follow-up actions


• Serve as a professional point of contact for internal stakeholders and external partners


• Handle confidential information with a high level of discretion and professionalism


• Work with administrative assistants in other organizations to coordinate schedules, projects and other initiatives


• Identify opportunities to improve administrative processes and drive efficiency


• Support projects and initiatives tied to business and operational priorities


• Maintain team office supplies, ordering stock, etc


• Interface with support organizations like IT and Facilities to arrange and coordinate services for team members and support office/cubicle assignments for the team


• Maintain organized digital filing systems and documentation (Teams, Sharepoint, etc)

• 8+ years of administrative experience in a professional, corporate environment (required)


• High School diploma or equivalent


• Experience supporting senior leaders, ideally within a fast-paced or technology-driven company


• Strong organizational and prioritization skills with the ability to manage multiple tasks


• Excellent written and verbal communication skills with a professional, polished tone


• Advanced proficiency with Microsoft Office (Outlook, Word, Excel, PowerPoint)


• Experience managing complex calendars and coordinating across teams and regions


• High attention to detail and strong problem-solving capabilities


• Ability to work independently while collaborating effectively across functions


• Professional presence and a proactive, solutions-oriented mindset

Preferred Qualifications

• Experience supporting executives or senior leadership


• Background in a global corporation, ideally within semiconductor, technology, or manufacturing environments


• Familiarity with corporate systems (e.g., travel management, PO placement and similar tools)


• Ability to anticipate needs and operate with a high degree of ownership