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Salary
$68k – $79k per year
Location
In office (Westminster)
Seniority
Junior
Visa
H-1B filings in 12 months: 2
Employment
Full-Time

Confirmed on the employer's own hiring board on Nov 11, 2026. First seen by Alion on Nov 5, 2026. CesiumAstro scores A on the Alion truth index.

Overview
Company
Impact
Profile match
CesiumAstro is an American company founded in Austin in 2017 that builds active phased array communications payloads for satellites, aircraft and defence platforms. Its systems are software-defined and electronically steered, which lets a moving platform track several links at once without mechanical antennas, and the company manufactures them in house rather than integrating third-party subsystems. It sells mainly to defence customers and satellite operators, has raised venture funding from investors including Airbus Ventures and Lightspeed, and operates facilities in Austin, Colorado and the United Kingdom.

We are looking to add a Office Administrator I to our team. In this role you will support the day-to-day administrative operations of the company by coordinating office activities, maintaining business records, and providing administrative support that enables efficient business operations. This role contributes to organizational effectiveness by supporting scheduling, document management, office coordination, and operational processes while ensuring a professional and well-organized work environment.

Working cross-functionally with employees, managers, vendors, and business stakeholders, this role supports administrative operations, office logistics, meeting coordination, and general business activities while ensuring services align with organizational needs and established procedures.

JOB DUTIES AND RESPONSIBILITIES

  • Provide daily administrative support to assigned departments and business leaders, including correspondence, reports, presentations, and meeting materials.
  • Coordinate calendars, meetings, conference rooms, travel arrangements, and other routine scheduling activities.
  • Assist with data entry, expense reporting, recordkeeping, and administrative tasks in accordance with established procedures.
  • Support daily office operations, including supply management, mail distribution, shipping and receiving, and general office coordination.
  • Prepare meeting spaces, coordinate visitor logistics, and maintain common office areas to support business activities.
  • Assist with facility-related requests, employee onboarding logistics, and routine office services in coordination with appropriate personnel.
  • Maintain organized business records, administrative files, correspondence, and supporting documentation in accordance with company procedures.
  • Prepare and update administrative templates, reports, operational records, and routine business documentation.
  • Handle sensitive business information in accordance with established confidentiality and recordkeeping requirements.
  • Respond to routine inquiries from employees, vendors, and external visitors while maintaining professional communication.
  • Coordinate assigned administrative activities supporting departmental projects, operational initiatives, and business stakeholders.
  • Identify routine workflow issues and support approved improvements to administrative procedures, office processes, and documentation practices.

JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS

  • Bachelor's degree in business administration, communications, office administration, or a related field with 0-2 years of related experience in administrative support, executive support, office administration, customer service, business operations, or a related field.
  • Basic knowledge of administrative support, office operations, document preparation, scheduling, and business communication practices.
  • Foundational understanding of administrative procedures, office workflows, records management, and documentation requirements.
  • Familiarity with Microsoft Office applications, standard business productivity tools, and office equipment.
  • Understanding of administrative coordination, task prioritization, scheduling requirements, and routine office support activities.
  • Basic knowledge of business communication, professional interactions, confidentiality requirements, and sensitive information handling practices.
  • Familiarity with document accuracy, recordkeeping, organizational procedures, and continuous improvement practices supporting efficient office operations.
  • Document management and file sharing platforms, e.g. SharePoint, OneDrive, or equivalent applications.
  • Scheduling, travel, and expense management systems, e.g. Concur, Navan, Outlook Calendar, or equivalent applications.
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