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.

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.

Responsibilities
Responsibilities

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

- 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)

- Support site onboarding of new hires – New Employee Orientation; System access requests, SWAG ordering, etc.

Qualifications
Requirements

- 3-6 years of administrative experience in a professional environment

- 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

- Close 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 ideally within semiconductor, technology, or manufacturing environments

- Familiar with tools such as Oracle, online travel tools (e.g., travel management, Purchase Requisition submissions)

- Professional presence and a proactive, solutions-oriented mindset

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