Senior Administrative Assistant

United States·AustinFull-timesenior

Administrative AssistantAdministration & Office Support

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Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident,

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Administrative AssistantAdministration & Office Support

Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident, asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)), or eligible to obtain the required authorizations from the U.S. Department of State.

At CesiumAstro, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, CesiumAstro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team.

We are looking to add a highly organized and detail-oriented Senior Administrative Assistant to support members of the senior leadership team at CesiumAstro. This role will serve as a dedicated partner, responsible for managing complex calendars, coordinating domestic and international travel, preparing executive materials, and ensuring seamless day to day support for senior leadership. The ideal candidate brings strong judgment, discretion, and the ability to operate effectively in a fast-paced, high-growth environment.

Complete expense reports and manage related documentation with accuracy and timeliness.

Provide dedicated administrative support to senior leaders, ensuring priorities are managed efficiently and proactively.

Own and strategically manage complex calendars, including prioritization of meetings, conflict resolution, and alignment across multiple stakeholders and time zones.

Coordinate detailed domestic and international travel arrangements, including multi-leg itineraries and real-time adjustments as needed.

Support the preparation and coordination of materials, including agendas, presentations, reporting summaries, and confidential communications, ensuring accuracy, formatting, and timely distribution.

Act as a liaison between leaders and internal/external stakeholders, exercising sound judgment and discretion.

Anticipate needs, proactively remove obstacles, and support operational effectiveness as the company scales.

A minimum of 7 years of progressive administrative experience is required. Experience providing direct support to mid to senior level leadership teams is preferred.

Associate’s degree required, bachelor's degree preferred.

Outstanding organization skills, with solid attention to detail and critical thinking.

Prior experience managing complex travel arrangements and coordination of calendars for meeting management.

Proficiency in Microsoft Office suite (Word, Excel, PowerPoint, Outlook).

Exceptional written and verbal communication skills with the ability to interface confidently with senior leadership and external stakeholders.

Strong professional presence, sound judgment, and the ability to operate independently in a dynamic environment.

The ability to work as part of a team and to build strong working relationships.

Experience supporting Finance, Revenue, or Sales leadership is preferred.

CesiumAstro considers several factors when extending an offer, including but not limited to, the role and associated responsibilities, a candidate’s work experience, education/training, and key skills. Full-time employment offers include company stock options and a generous benefits package including health, dental, vision, HSA, FSA, life, disability and retirement plans.

CesiumAstro is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected Veteran Status, or any other characteristic protected by applicable federal, state, or local law.

Please note: CesiumAstro does not accept unsolicited resumes from contract agencies or search firms. Any unsolicited resumes submitted to our website or to CesiumAstro team members will be considered property of CesiumAstro, and we will not be obligated to pay any referral fees.