Linux Application Administrator

Overview

Job Summary

Galapagos Federal Systems LLC is seeking a motivated Linux Applications Administrator to join our team and work alongside a diverse group of talented professionals dedicated to mission success.

The Linux Applications Administrator provides application administration support for Linux-hosted applications within the Defense Travel Management Office (DTMO) Enterprise Infrastructure. This role is responsible for the lifecycle management of Government Off-The-Shelf (GOTS) and Commercial Off-The-Shelf (COTS) applications, including installation, testing, deployment, troubleshooting, updates, logging, and patching.

The administrator serves as the Subject Matter Expert (SME) for DTMO supported Linux applications, supporting users and IT leadership. Key technologies include Red Hat Enterprise Linux, Apache, Tomcat, LDAP, Oracle Unified Directory, Red Hat Single Sign-On, and Splunk.

Responsibilities also include monitoring the DTMO Passport website and applications during core business hours (0600-2200 ET, Monday-Friday) and providing on-call support for critical incidents outside those hours. The role works closely with DMDC IT System Administrators, supports disaster recovery testing, participates in Governance Board activities, and follows ITIL best practices for incident management and root cause analysis.

Key Responsibilities

The Application Administrator for Linux will:

• Install, test, deploy, debug, update, and patch DTMO GOTS and COTS applications on Linux platforms
• Troubleshoot application concerns and respond to inquiries from application users
• Support logging software that captures security events and feeds into DMDC-approved software
• Configure user access and monitor system stability and security through the software development life cycle
• Coordinate with DMDC IT System Administrators to resolve infrastructure-related issues
• Perform application maintenance, review error logs, and resolve reported errors
• Provide technical support and guidance to DTMO users and IT managers
• Support setting up external connections, listing activities, port and protocols, submission requests, and validations
• Ensure application and DTMO Passport website monitoring during core hours (0600 to 2200 Eastern Time, Monday through Friday) and on-call basis for mission-critical incidents at all other times
• Coordinate with DMDC to develop and maintain technical documents such as network diagrams, standard operating procedures, and ports and protocols lists
• Support Governance Board processes including documentation development, change request review, level of effort estimates, impact assessments, and stakeholder coordination
• Coordinate with DMDC to support disaster recovery tests to reinstate DTMO Passport website
• Restore normal operation after incidents, prepare root cause analysis, and apply ITIL best practices

Responsibilities

Skills and Experience

The Applications Administrator for Linux must have:

• Must obtain and maintain a Tier 3 (T3) or higher background investigation
• 5+ years of experience in Application Administration
• Experience administering Linux-based applications in enterprise or government environments
• Strong knowledge of Linux operating systems such as Red Hat Enterprise Linux (RHEL), CentOS, or Ubuntu
• Experience with application installation, configuration, patching, and lifecycle management
• Familiarity with Linux command-line tools, system services, and shell scripting
• Experience with system monitoring, performance tuning, and troubleshooting techniques
• Knowledge of network services, file systems, and system security practices within Linux environments
• Experience supporting change management and system updates in production environments
• Ability to diagnose and resolve application issues in coordination with system administrators and developers
• Strong analytical and problem-solving skills
• Ability to work collaboratively with cross-functional IT teams and federal stakeholders
• Experience with Apache web server
• Experience with Tomcat application server
• Experience with LDAP and Oracle Unified Directory
• Experience with Red Hat single sign-on
• Experience with Splunk technology for application management, security, and compliance
• Experience with SaaS, PaaS, and cloud platforms
• Strong written and verbal communication skills

Education and Certifications

The Applications Administrator for Linux must meet the following:

Required

• Bachelor's degree in information technology, Computer Science, Information Systems, or related fields. ( Red Hat Linux Certified System Administrator certification can be used in place of a bachelor's degree)
• Relevant professional experience in Linux systems or application administration may substitute for formal education in some cases.

Preferred

• Red Hat Certified System Administrator (RHCSA)
• Red Hat Certified Engineer (RHCE)
• CompTIA Linux+

Benefits

• Medical, dental, vision, disability, and life insurance
• Flexible Spending Accounts
• 401(k)
• PTO
• Paid Parental Leave
• Tuition reimbursement
• Paid federal holidays

Security Clearance

A high-level Department of Defense active security clearance is/may be required. Applicants selected will be subject to a security investigation and may need to meet eligibility requirements for access to government information.

Physical Requirements

Work may involve sitting or standing for extended periods of time and typing and reading from a computer screen. The candidate must have enough mobility, including bending, reaching, and kneeling, to complete daily duties in a prompt and efficient manner, and that may include lifting up to thirty pounds, as necessary.

Company Summary

Headquartered in Hawaii, Galapagos Federal Systems, LLC, is an SBA-Certified NHO-owned 8(a) Small Business specializing in global information technology solutions. We deliver professional services in IT Design & Installation, Cybersecurity Engineering & Support, Application Integration & Development, Software & Hardware Engineering, Network & Systems Management, Information Systems Security, and Business Management Services.

Leveraging over 30 years of providing IT services to the federal & commercial market with projects found around the world, our team has innovative expertise in the development of a wide range of technological solutions. Galapagos Federal Systems, LLC is an equal opportunity employer.

Our service commitment is simple - "Quality IT Solutions... On Time & On Budget."

Company Employment Statement

Galapagos Federal Systems, LLC reserves the right to change or modify job duties and assignments at any time. The above job description is not all encompassing as positions, functions, and qualifications may vary depending on business needs. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

Galapagos Federal Systems, LLC is an equal opportunity employer and does not discriminate against applicants based on race, color, creed, religion, medical condition, legally protected genetic information, national origin, sex (including pregnancy, childbirth, or related medical condition), sexual orientation, gender identity and expression, age, disability, or Vietnam era, or other eligible veteran status or legally protected characteristics.

Posted Salary Range

USD $95,000.00 - USD $116,000.00 /Yr.