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Administrative Assistant

Job in Arlington, Arlington County, Virginia, 22201, USA
Listing for: System One Holdings, LLC
Full Time position
Listed on 2026-06-27
Job specializations:
  • Administrative/Clerical
    Office Administrator/ Coordinator, Virtual Assistant/ Remote Admin
Job Description & How to Apply Below

Administrative Assistant

We're looking for a highly organized and proactive Administrative Assistant to support senior leadership in a fast-paced, collaborative environment. In this role, you'll play a key part in keeping operations running smoothly—managing schedules, coordinating meetings, and ensuring seamless communication across multiple teams and organizations. This is a great opportunity for someone who thrives in a dynamic setting, enjoys multitasking, and takes pride in staying one step ahead.

What

You'll Do Executive & Team Support
  • Provide day-to-day administrative support to senior leadership
  • Coordinate activities and follow-ups across multiple teams and stakeholders
  • Anticipate leadership needs and proactively prepare for upcoming priorities
Calendar & Schedule Management
  • Manage complex, frequently changing calendars using Microsoft Outlook
  • Coordinate meetings, conference rooms, and visitor schedules
  • Communicate schedule changes quickly and effectively to all participants
Meetings & Coordination
  • Organize and support team and leadership meetings
  • Prepare agendas, attend meetings, and capture notes and action items
  • Track and follow up on key deliverables and action items
Travel & Expense Management
  • Arrange domestic and international travel, including logistics and itineraries
  • Prepare and submit expense reports accurately and on time
  • Anticipate potential travel challenges and plan alternatives
Office Operations & Technology
  • Support the setup and operation of audiovisual and telecommunications equipment
  • Help maintain smooth day-to-day operations within the office environment
What You Bring

Required Qualifications
  • 3+ years of experience supporting senior leaders as an Administrative Assistant (ideally in a government or defense-related environment)
  • Strong proficiency in Microsoft Office (Outlook, Word, Excel, PowerPoint)
  • Experience managing calendars, emails, and schedules in a fast-paced environment
  • Experience coordinating travel (domestic and international) and expense reporting
  • Ability to obtain a DoD Security Clearance
Skills & Strengths
  • Highly organized with strong attention to detail
  • Excellent time management and ability to prioritize competing tasks
  • Strong written and verbal communication skills
  • Proactive, self-motivated, and able to work with minimal supervision
  • Comfortable working with a variety of stakeholders across different teams and organizations
  • Quick learner with a positive, team-oriented mindset
Nice to Have
  • Advanced skills in Microsoft Outlook and Office tools
  • Experience working in a fast-paced, multi-team or cross-organizational environment
  • Experience managing travel risks and adjusting plans as needed
  • Experience supporting diverse teams, including international stakeholders
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