Administrative Assistant

Administrative AssistantOnsemi 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.ResponsibilitiesResponsibilitiesProvide administrative support to leaders and cross-functional teams in a corporate, global environmentManage complex calendars, including scheduling across multiple time zones and shifting prioritiesCoordinate domestic and international travel, including itineraries and expense reportingPrepare high-quality documents, presentations, and communications for business useFacilitate meetings, including logistics, agendas, and follow-up actionsServe as a professional point of contact for internal stakeholders and external partnersHandle confidential information with a high level of discretion and professionalismWork with administrative assistants in other organizations to coordinate schedules, projects and other initiativesIdentify opportunities to improve administrative processes and drive efficiencySupport projects and initiatives tied to business and operational prioritiesMaintain team office supplies, ordering stock, etcInterface with support organizations like IT and Facilities to arrange and coordinate services for team members and support office/cubicle assignments for the teamMaintain organized digital filing systems and documentation (Teams, Sharepoint, etc)Support site onboarding of new hires – New Employee Orientation; System access requests, SWAG ordering etc....QualificationsRequirements8+ years of administrative experience in a professional, corporate environment (required)High School diploma or equivalentExperience supporting senior leaders, ideally within a fast-paced or technology-driven companyStrong organizational and prioritization skills with the ability to manage multiple tasksExcellent written and verbal communication skills with a professional, polished toneAdvanced proficiency with Microsoft Office (Outlook, Word, Excel, PowerPoint)Experience managing complex calendars and coordinating across teams and regionsHigh attention to detail and strong problem-solving capabilitiesAbility to work independently while collaborating effectively across functionsProfessional presence and a proactive, solutions-oriented mindsetPreferred QualificationsExperience supporting executives or senior leadershipBackground in a global corporation, ideally within semiconductor, technology, or manufacturing environmentsFamiliar with tools such as Oracle, online travel tools (e.g., travel management, Purchase Requisition submissions)Professional presence and a proactive, solutions-oriented mindsetAbility to anticipate needs and operate with a high degree of ownershipSalary: Onsemi is excited to share the base salary range for this position is $25.53 to $44.76 exclusive of fringe benefits or potential bonuses. The final pay rate for the successful candidate will depend on geographic location, skills, education, experience, and/or consideration of the internal equity of our current team members. We also offer a competitive benefits package.Required SkillsExecutive calendar managementOperational disciplineOrganizational and Project ManagementProficiency in Outlook, Sharepoint, Excel, Teams, PowerpointCollaboration and relationship buildingAbout UsOnsemi (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.About the TeamWe 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 InfoJob Identification 2506371Job Category Administrative AssistantsPosting Date 08/21/2026, 07:58 PMDegree Level BachelorsJob Schedule Full timeJob Shift DayLocations Building 308 Receiving, Hopewell Junction, NY, 12533, US