Linux Application Administrator
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Job Description
Linux Applications Administrator providing administration support for GOTS and COTS applications on Linux. Collaborating with IT teams and managing application lifecycle for the Defense Travel Management Office.
Responsibilities:
- 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, whitelisting 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
Requirements:
- 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.
Benefits:
- Medical, dental, vision, disability, and life insurance
- Flexible Spending Accounts
- 401(k)
- PTO
- Paid Parental Leave
- Tuition reimbursement
- Paid federal holidays
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