Administrative Assistant

Houston, TXfull time

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Administrative Assistant at Marianaminerals · LumiJobs

On Site

mid

H1B: no

Marianaminerals Administrative Assistant at Mariana Minerals supporting day-to-day administrative operations including calendar, travel, and expense management. Provides backup to the Executive Assistant and supports office logistics and events.

Responsibilities

We are seeking a highly organized and proactive Administrative Assistant to support day-to-day administrative operations at our Houston office. This role is ideal for someone early in their career who is detail-oriented, resourceful, and eager to grow within an operations or executive support function.
The Administrative Assistant will provide administrative support to the CFO, including calendar and travel coordination and expense management, while also supporting day-to-day office operations. The role will also serve as backup to the Executive Assistant as needed. This position requires strong communication skills, flexibility, sound judgment, and the ability to manage competing priorities in a fast-paced environment.
Administrative & Calendar Support
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
Travel & Logistics
Book and manage domestic and international travel (flights, hotels, ground transportation)
Handle last-minute travel changes and troubleshoot logistical issues
Expense & Reporting Support
Prepare and submit expense reports in a timely and accurate manner
Reconcile receipts and assist with tracking budgets or spending reports

Qualification

Proficiency in Microsoft OfficeProblem-solving mindsetTeam player with a positive attitude

Required

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

Preferred

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

Company

Marianaminerals

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Source: ashby

Active within the past hour

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Microsoft Office

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