System Administrator

United States Air Force; United States; On-site; USD 90,000 - 120,000; Full time

Job summary

A leading national security organization is seeking an Application Administrator to manage software applications' technical maintenance and optimization. Responsibilities include ensuring high performance of critical systems, performing updates, and managing user access. The ideal candidate should have 2-3 years of experience in a similar role, hold a CompTIA Security+ certification, and be a US citizen with an active security clearance. This role emphasizes a commitment to diversity and equal opportunity.

Qualifications

• 2-3 years of hands-on experience as a System Administrator/Applications Administrator maintaining applications.
• Current CompTIA Security+ certification required.
• Preferable certifications include CISSP, CCNA, CAP, CASP+ CE, CCISO, CND, CSSLP, CYSA+, GSLC, SSCP.

Responsibilities

• Ensure high availability and performance of critical business systems.
• Perform regular updates and troubleshoot complex issues.
• Administer user security, permissions, and roles.
• Collaborate with vendors to resolve issues and evaluate new features.

Skills

Application Maintenance

System Monitoring

Troubleshooting

User Management

Automation

Vendor Liaison

Documentation

Change Management

SaaS administration

PowerShell scripting

Bash scripting

Python scripting

User access management

Vendor liaison

Technical documentation

Change management

Tools

Windows Server 2022

Windows 11

Cloudbees Jenkins

Ansible

Loadrunner

FlexDeploy

ConfigSnapShot

Job description

The Application Administrator is responsible for the technical administration, maintenance, and optimization of an organization's software applications. This role ensures high availability, security, and performance of critical business systems like ERPs, CRMs, and SaaS solutions by performing regular updates, troubleshooting complex issues, and managing user access.

Required Skills

• Application Maintenance: Install, configure, and upgrade server-side and client-side application software.
• Applications include but not limited to Windows Server 2022, Windows 11, Cloudbees Jenkins, Ansible, Loadrunner, FlexDeploy, ConfigSnapShot, etc.
• 2‑3 Years hands on experience as a System Administrator/Applications Administrator maintaining applications, production uptime, licensing, managing vulnerabilities and addressing upgrade related tasks.
• System Monitoring: Proactively monitor application performance, uptime, and logs to prevent or minimize customer impact.
• Troubleshooting: Provide Tier 2/3 support to diagnose and resolve software bugs, system errors, and integration failures.
• User Management: Administer user security, permissions, and roles within applications to maintain data integrity and compliance.
• Automation: Write and maintain scripts (e.g., PowerShell, Bash, Python) to automate routine tasks and backups.
• Vendor Liaison: Collaborate with external software vendors to resolve technical issues and evaluate new features.
• Documentation: Create and maintain technical guides, user manuals, and system configuration databases.
• Change Management: Coordinate maintenance windows and patches according to established organizational policies.

Current CompTIA Security+ Required

Preferred Certifications (8570 Baseline)

• CISSP, CCNA, CAP, CASP+ CE, CCISO, CND, CSSLP, CYSA+, GSLC, SSCP

Clearance Requirement

US CITIZENS ONLY – Secret – Fully Cleared Only, must confirm clearance is active.

Marathon TS is committed to the development of a creative, diverse and inclusive work environment. In order to provide equal employment and advancement opportunities to all individuals, employment decisions at Marathon TS will be based on merit, qualifications, and abilities. Marathon TS does not discriminate against any person because of race, color, creed, religion, sex, national origin, disability, age or any other characteristic protected by law (referred to as "protected status").