Administrative Assistant

Administrative Assistant

onsemi is driving disruptive innovations to help build a better futurepowering 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)

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.

More details about our company benefits can be found here:

About the Team

We are committed to sourcing, attracting, and hiring high-performance innovators, while providing all candidates a positive recruitment experience that builds our brand as a great place to work. onsemi is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, ethnicity, color, religion, ancestry, national origin, age, marital status, pregnancy, sex, sexual orientation, physical or mental disability, medical condition, genetic information, military or veteran status, gender identity, gender expression, or any other protected category under applicable federal, state, or local laws. If you are an individual with a disability and require a reasonable accommodation to complete any part of the application process, or are limited in the ability or unable to access or use this online application process and need an alternative method for applying, you may contact View email address on click.appcast.io for assistance.

Job Info

• Job Identification 2506321
• Job Category Administrative Assistants
• Posting Date 08/13/2026, 01:01 AM
• Degree Level High School /GED (Secondary)
• Job Schedule Full time
• Locations 5701 N Pima Road, Scottsdale, AZ, 85250, US