Mission-Critical Office Administrator | Ops & Compliance

Amentum; Fallon (NV); On-site; USD 27,552,000 - 44,083,000; Full time

Benefits offered by this job

Health insurance

401(k) matching

Paid time off

Educational reimbursement

Parental leave

Pet insurance

Job summary

Amentum is seeking an Administrative Assistant III/Office Administrator to provide comprehensive administrative and operational support at Naval Air Station Fallon. You will handle travel/expense processes, manage office supplies, and assist with onboarding, compliance, and audits.

This role emphasizes discretion, organization, and cross-team collaboration. Ideal candidates have 3–5 years of administrative experience, strong MS Office skills, and the ability to manage multiple priorities in a

Qualifications

• 3–5 years of related administrative, clerical, or receptionist work.
• Advanced proficiency in Microsoft Office Suite (Outlook, Word, Excel, PowerPoint, Teams).
• Professional, clear, and concise communication, both written and verbal.

Responsibilities

• Coordinate travel detachment reservations and expense processing.
• Oversee office supply inventory and reordering.
• Process and track invoices; maintain records for reconciliation.
• Prepare agendas, track actions, and follow up on outcomes.

Skills

Administrative experience

Microsoft Office

Communication skills

Detail-oriented

Organization

Education

High School diploma

Tools

Microsoft Outlook

Word

Excel

PowerPoint

Teams

Job description

Amentum is seeking an Administrative Assistant III/Office Administrator to provide comprehensive administrative and operational support at Naval Air Station Fallon. You will handle travel/expense processes, manage office supplies, and assist with onboarding, compliance, and audits.

This role emphasizes discretion, organization, and cross-team collaboration. Ideal candidates have 3–5 years of administrative experience, strong MS Office skills, and the ability to manage multiple priorities in a