Administrative Assistant: CFO Support & Office Operations

Mariana Minerals; Georgia; On-site; USD 42,000 - 60,000; Full time

Job summary

Mariana Minerals in Houston is seeking an organized Administrative Assistant to support CFO and office operations. This role is ideal for someone early in their career who is detail-oriented, resourceful, and eager to grow within operations or executive support.

You will coordinate calendars, travel, expenses, and visitor management, while backing up the Executive Assistant during busy periods. Strong communication and discretion are essential.

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 and professional, service-oriented approach.
• Adaptability in a fast-paced environment.
• Team player with a positive attitude.

Responsibilities

• Provide Administrative & Calendar Support: schedule meetings, manage calendars, coordinate appointments.
• Travel & Logistics: book domestic and international travel and manage changes.
• Expense & Reporting Support: prepare expense reports and reconcile receipts.
• On-Site & Office Support: office supplies, visitor management, and event support.
• Executive Assistant Backup: cover for the Executive Assistant during absences and peaks.

Skills

Administrative experience

Organizational skills

Communication skills

Time management

Discretion with confidential info

Tools

Microsoft Office

Job description

Mariana Minerals in Houston is seeking an organized Administrative Assistant to support CFO and office operations. This role is ideal for someone early in their career who is detail-oriented, resourceful, and eager to grow within operations or executive support.

You will coordinate calendars, travel, expenses, and visitor management, while backing up the Executive Assistant during busy periods. Strong communication and discretion are essential.