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

• 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)

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

Requirements

• 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

• 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 in a global corporation, 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