Senior Administrative Assistant

Why choose between doing meaningful work and having a fulfilling life? At MITRE, you can have both. That's because MITRE people are committed to tackling our nation's toughest challenges—and we're committed to the long-term well-being of our employees. MITRE is different from most technology companies. We are a not-for-profit corporation chartered to work for the public interest, with no commercial conflicts to influence what we do.

The R&D centers we operate for the government create lasting impact in fields as diverse as cybersecurity, healthcare, aviation, defense, and enterprise transformation. We're making a difference every day—working for a safer, healthier, and more secure nation and world. Our workplace reflects our values. We offer competitive benefits, exceptional professional development opportunities for career growth, and a culture of innovation that embraces adaptability, collaboration, technical excellence, and people in partnership.

If this sounds like the choice you want to make, then choose MITRE - and make a difference with us.

Mission Computing is a newly established division in MITRE Operations Sector, created as the institutional home for MITRE's advanced computing infrastructure and operational AI support across all mission programs. Think mission platforms, AI enablement, lab support, virtual environments, and secure mission compute, all under one roof, with an integrated service model that makes computing easier to discover, request, and use across MITRE.

The division's Director also serves as MITRE's Head of AI Enablement, leading the enterprise AI-Native Workforce initiative to ensure MITRE succeeds at adopting frontier AI tools and AI-based workflows into its operations, research, and mission-focused project work.

In this high-trust front-office role, the successful candidate will partner upward with the COO's office and admin team, and laterally across peer organizations, including Enterprise Technology, Communications & External Affairs, Global Security, the Operational Excellence program office, as well as with Finance and HR. At launch, this fast-growing resource organization is comprised of a Director, Deputy Director, 2 departments, and approximately 75 staff.

This is a rare chance to shape operating rhythms and drive the success of a high-visibility new organization at MITRE.

• Manage complex calendars, daily priorities, meeting cadence, and operating rhythms for the Mission Computing leadership/front-office function.
• Coordinate MC leadership meetings, roadmap reviews, all-hands, stakeholder engagements, and cross-site logistics for geographically distributed teams.
• Support AI Native Workforce activities, including adoption events and related stakeholder coordination, while demonstrating curiosity and initiative in exploring how administrative professionals can responsibly apply AI to improve operational excellence
• Coordinate logistics for staff onboarding, hiring interviews, visitor coordination, infrastructure tours, parking, badging/escort needs, and new staff integration activities.
• Prepare, coordinate, and manage documents, presentations, action trackers, approvals, signatures, communications, and content repositories such as SharePoint and Microsoft Teams.
• Arrange travel, prepare itineraries, process expense reports, support purchase requests and requisitions, and provide general office/event management support.
• Maintain discretion and confidentiality while handling sensitive leadership communications, organizational planning, budget, staffing, platform operations and AI policy materials.

• Typically requires a minimum of 3 years of related experience with a High School Diploma or equivalent in education, or 2 years of experience and an Associate's degree, or a combination of education and related work experience.
• Experience supporting a senior executive, equivalent executive-level staff, or a department/division leadership team in an administrative or front-office role.
• Demonstrated proficiency with Microsoft PowerPoint, Word, Excel, Outlook, Microsoft Teams, Zoom, and related desktop, mobile, and VTC technologies.
• St…