Administrative Assistant
Mariana Minerals· General
Houston, TXFull-timePosted 1mo ago
About the role
Administrative Assistant to support CFO and day-to-day operations in Houston, with potential backup to Executive Assistant and responsibilities spanning calendar, travel, expense management, office operations, and event support.
Responsibilities
- Assist with scheduling meetings, managing calendars, and coordinating internal and external appointments
- Help prepare meeting materials, agendas, and notes as needed
- Support coordination of cross-functional meetings and company events
- Book and manage domestic and international travel (flights, hotels, ground transportation)
- Handle last-minute travel changes and troubleshoot logistical issues
- Prepare and submit expense reports in a timely and accurate manner
- Reconcile receipts and assist with tracking budgets or spending reports
- Provide in-office support as needed
- Coordinate office supplies, deliveries, and facilities-related requests
- Assist with visitor management and on-site meeting logistics
- Support internal events and team off-sites
- Serve as backup to the Executive Assistant during absences
- Provide overflow support during high-volume periods
- Assist with special projects and ad hoc requests
Qualifications
- 1–3+ years of administrative or office support experience preferred
- Strong organizational skills and attention to detail
- Excellent written and verbal communication skills
- Proficiency in Microsoft Office
- Experience with expense management and calendar systems preferred
- Ability to handle confidential information with discretion
- Strong time management and prioritization skills
- Problem-solving mindset
- Professional and service-oriented approach
- Adaptability in a fast-paced environment
- Team player with a positive attitude
Skills
Required:Administrative supportcalendar management
Nice to have:travel coordination
Last updated Sep 9, 2026. Interested? Apply on the company site.
About Mariana Minerals
We to the Future of Minerals, verify the mineral supply chain.
Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies.
software-firstmineralsenergyAIdefense
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