Administrative Assistant

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.

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)

Qualifications

• 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

About Us

onsemi (Nasdaq: ON) is driving disruptive innovations to help build a better future. With a focus on automotive and industrial end-markets, the company is accelerating change in megatrends such as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. With a highly differentiated and innovative product portfolio, onsemi creates intelligent power and sensing technologies that solve the world's most complex challenges and leads the way in creating a safer, cleaner, and smarter world.

Job Info

• Job Identification 2505605
• Job Category Administrative Assistants
• Locations 5701 N Pima Road, Scottsdale, AZ, 85250, US