Applications Administrator for Linux

KaiHonua; Denver (CO); On-site; USD 110,000 - 120,000; Full time

Job summary

Mano Lani LLC seeks a Linux Applications Administrator to manage DTMO GOTS/COTS apps on Linux. You’ll install, test, patch, and monitor applications, coordinate with DMDC IT, and provide on‑call support for mission‑critical incidents. Strong Linux, RHCSA/RHCE, Apache, Tomcat, LDAP, and Splunk experience required.

Responsibilities include disaster recovery testing, ITIL-aligned incident management, and creating technical documents. DoD-focused role with on-site work hours; salary posted.

Qualifications

• Bachelor's degree in Information Technology, Computer Science, Information Systems, or a related field (RHCSA/RHCE can substitute)
• 5+ years of experience in Application Administration
• Experience administering Linux-based applications in enterprise or government environments
• Strong knowledge of Linux operating systems (RHEL/CentOS/Ubuntu)
• Experience with application installation, configuration, patching, and lifecycle management
• Familiarity with Linux CLI, services, and shell scripting
• Experience with logging, monitoring, and security practices in Linux environments
• Knowledge of Apache web server, Tomcat, LDAP, Oracle Unified Directory, Red Hat SSO, and Splunk

Responsibilities

• Install, test, deploy, debug, update, and patch DTMO GOTS and COTS applications on Linux platforms
• Troubleshoot application concerns and respond to inquiries from users
• Support logging software that captures security events
• Configure user access and monitor system stability and security
• Coordinate with DMDC IT System Administrators to resolve infrastructure issues
• Perform maintenance, review logs, and resolve errors
• Provide technical support to DTMO users and IT managers
• Support setup of external connections, whitelisting, ports, and protocols
• Ensure monitoring during core hours and on-call support outside these hours
• Develop and maintain technical docs with DMDC
• Support Governance Board processes and disaster recovery tests
• Produce root-cause analyses and apply ITIL practices

Skills

RHCSA

RHCE

CompTIA Linux+

CompTIA Security+

ITIL Foundation

Linux administration

Apache

Tomcat

LDAP

Oracle Unified Directory

Red Hat SSO

Splunk

SaaS/PaaS/Cloud

5+ years experience

Collaborative work

Education

Bachelor's degree in IT/CS/Information Systems

Tools

Red Hat Enterprise Linux (RHEL)

CentOS

Ubuntu

Job description

Overview

Introduction: Mano Lani LLC is looking for an enthusiastic, well-qualified individual to fill the Linux Applications Administrator position. This role offers the opportunity to work with a diverse and talented group of individuals committed to driving success. Mano Lani is an exceptional industry partner to the Department of Defense (DoD) and a leader in physical and cyber security, IT management, logistics, supply chain management, process improvement and development.

The Linux Applications Administrator provides comprehensive application administration support for all Linux-hosted applications within the Defense Travel Management Office (DTMO) Enterprise Infrastructure. The position is responsible for the full life‑cycle management of Government Off‑The‑Shelf (GOTS) and Commercial Off‑The‑Shelf (COTS) applications, including installation, testing, deployment, debugging, updating, event logging, and patching. The Administrator serves as the SME to DTMO for all supported Linux applications, providing technical guidance and support to DTMO users and IT managers. Key technologies include Red Hat Enterprise Linux, Apache web server, Tomcat application server, LDAP, Oracle Unified Directory, Red Hat single sign‑on, and Splunk.

The Administrator monitors the DTMO Passport website and applications during core business hours (0600 to 2200 Eastern Time, Monday through Friday) and provides on‑call support for mission‑critical incidents outside core hours. Responsibilities also include coordinating with DMDC IT System Administrators to resolve infrastructure issues, supporting disaster recovery testing, participating in Governance Board processes, and applying ITIL best practices for incident management and root‑cause analysis.

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 lifecycle
• 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

Qualifications

• Bachelor's degree in Information Technology, Computer Science, Information Systems, or a related field. (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+
• CompTIA Security+
• ITIL Foundation Certification
• 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
• Mano Lani LLC reserves the right to change or modify job duties and assignments at any time. The above job description is not all encompassing; job functions and qualifications may vary depending on business needs.
• Mano Lani 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 $110,000.00 – USD $120,000.00 per year