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