Administrative Assistant

onsemi; Hudson (NH); On-site; USD 65,000 - 90,000; Full time

Job summary

onsemi is seeking an Administrative Assistant to provide critical support to leaders and teams in our Operations and Manufacturing organization, ensuring seamless day-to-day operations and enabling business efficiency.

The role requires 8+ years of corporate administrative experience, polished communication, and a proactive, solutions-oriented mindset. You will coordinate calendars, travel, and confidential information while collaborating across functions.

Qualifications

• 8+ years of administrative experience in a professional, corporate environment.
• High School diploma or equivalent.
• Experience supporting senior leaders in fast-paced tech environments.

Responsibilities

• Manage complex calendars across time zones for leaders.
• Coordinate domestic and international travel and expenses.
• Prepare high-quality documents, presentations, and communications.
• Interface with IT and Facilities to coordinate services.
• Maintain organized digital filing systems and onboarding for new hires.
• Drive efficiency by identifying administrative process improvements.

Skills

Organization

Prioritization

Communication

Calendar management

Education

High School diploma or equivalent

Tools

Microsoft Office

Job description

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