Administrative Assistant

Mariana Minerals
Houston
Workplace: OnsiteFull timeFunction: Administration & Executive AssistanceSkills: ["Organizational skills","Attention to detail","Communication","Time management","Discretion"]

Provide day-to-day administrative support in the Houston office, including scheduling meetings, managing calendars, and coordinating appointments and office logistics. Support the CFO with calendar and travel coordination, expense report preparation, and receipt reconciliation. Serve as backup to the Executive Assistant for overflow and special projects, while helping manage supplies, deliveries, visitor/on-site meeting logistics, and internal events. Ideal for an early-career, detail-oriented candidate.

Loading

Loading job details...

Preparing the role view and application actions.

FursaFursa
Mariana Minerals
Mariana Minerals
2 days ago

Administrative Assistant

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 32 minutes agoStatus: Live

Job Summary

Provide day-to-day administrative support in the Houston office, including scheduling meetings, managing calendars, and coordinating appointments and office logistics. Support the CFO with calendar and travel coordination, expense report preparation, and receipt reconciliation. Serve as backup to the Executive Assistant for overflow and special projects, while helping manage supplies, deliveries, visitor/on-site meeting logistics, and internal events. Ideal for an early-career, detail-oriented candidate.
Location: Houston
Workplace: Onsite
Employment Type: Full time
Job Function: Administration & Executive Assistance
Seniority: Entry level

Key Responsibilities

  • •Assist with scheduling meetings, managing calendars, and coordinating internal and external appointments.
  • •Prepare meeting materials, agendas, and notes as needed; support cross-functional meetings and company events.
  • •Book and manage domestic and international travel and troubleshoot last-minute changes.
  • •Prepare and submit expense reports, reconcile receipts, and assist with tracking budgets or spending reports.
  • •Coordinate office supplies, deliveries, and facilities requests; support visitor management and serve as backup to the Executive Assistant.

Key Requirements

  • •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.
  • •Ability to handle confidential information with discretion and manage competing priorities.
Skills:Organizational skillsAttention to detailCommunicationTime managementDiscretion
Tech Stack:Microsoft Office

Company Brief

Mariana Minerals
Software-first, vertically integrated minerals company developing extraction, processing, and automation systems to supply critical minerals (lithium and others) for energy, AI, and defense technologies, and building commercial-scale lithium facilities from produced water.
Industry: Mining & Metals
Company Size: Small (11 to 50 employees)
Growth: Early Stage Startup
Funding: Series A
Headquarters: San Francisco, United States
WebsiteLinkedInGlassdoor