Linux Support Technician - Tier II

IP Secure, LLC•San Antonio, TX

1d•Onsite

About The Position

IPSecure is seeking an experienced Tier II Linux Support Technician to provide advanced technical engineering, administration, troubleshooting, and cybersecurity support for enterprise Ubuntu Linux environments supporting Department of Defense mission operations. The role requires hands-on Ubuntu engineering experience in production environments, advanced troubleshooting, security hardening, enterprise patch management, virtualization expertise, and the ability to independently diagnose and resolve complex operating system and infrastructure issues. The technician serves as the primary technical escalation resource for Tier I personnel and coordinates complex issues requiring Tier III support through established program management channels. The position primarily operates from IPSecure's Port San Antonio location, with on-site support at the customer's location as mission requirements dictate.

Requirements

At least 5 years of hands-on Linux systems administration or engineering experience.
At least 3 years of experience administering Ubuntu Linux systems in production environments.
Advanced knowledge of Linux architecture, services, processes, file systems, permissions, and networking.
Demonstrated experience troubleshooting complex Linux operating system and infrastructure issues.
Strong understanding of Ubuntu package management, repositories, system updates, and security patching.
Experience with patch validation, regression testing, and system configuration management.
Working knowledge of Linux virtualization technologies, including KVM and container-based environments.
Experience implementing Linux security hardening and vulnerability remediation.
Familiarity with DISA STIGs, CIS Benchmarks, and enterprise cybersecurity compliance requirements.
Experience analyzing system logs, performance metrics, and operating system diagnostic information.
Proficiency with Bash scripting and Linux command-line administration.
Strong technical documentation, analytical, and communication skills.
Ability to independently manage complex technical issues while coordinating with engineering teams and external support organizations.
8140 certification required (Security+).
TS/SCI clearance required.

Nice To Haves

Experience supporting Ubuntu Linux systems in DoD or Federal Government production environments.
Hands-on experience with Canonical Landscape, MAAS, LXD, Ubuntu Pro, Livepatch, and ESM.
Experience using Ubuntu Security Guide (USG) for security hardening and compliance validation.
Experience implementing and validating DISA STIG and CIS security baselines.
Familiarity with ACAS, Nessus, or equivalent vulnerability scanning technologies.
Experience with infrastructure automation tools such as Ansible, Terraform, or equivalent technologies.
Experience supporting large-scale Linux deployments, virtualization platforms, and enterprise infrastructure.
Familiarity with Linux performance tuning, system optimization, and advanced troubleshooting.
Experience coordinating technical escalations with enterprise Linux vendors.
RHCSA, RHCE, LPIC-2, LPIC-3, or equivalent professional certifications.

Responsibilities

Provide advanced administration, maintenance, troubleshooting, and operational support for enterprise Ubuntu Linux systems.
Perform root-cause analysis of complex operating system, application, networking, performance, and infrastructure issues.
Diagnose and resolve recurring system failures, configuration conflicts, service interruptions, and operational deficiencies.
Analyze system logs, kernel messages, resource utilization, and performance metrics to identify technical issues.
Develop and implement corrective actions to improve system stability, security, and operational performance.
Provide technical guidance and escalation support to Tier I technicians.
Administer and troubleshoot Ubuntu Pro, Expanded Security Maintenance (ESM), and Livepatch capabilities.
Validate ESM and Ubuntu Universe security patches before deployment; conduct regression testing for compatibility, functionality, and system stability.
Configure and maintain management profiles and develop and execute staggered patch deployment campaigns through Landscape.
Monitor patch compliance, troubleshoot failed deployments and update-related issues, and maintain related documentation.
Administer and troubleshoot MAAS, including system commissioning and provisioning.
Diagnose and resolve LXD configuration, deployment, networking, and operational issues.
Troubleshoot KVM virtualization environments, including VM provisioning, resource allocation, and connectivity.
Investigate hardware compatibility, firmware, driver, and operating system integration issues.
Assist Tier III and engineering personnel with hardware readiness, physical system access, firmware and driver updates, and approved recommendations.
Support enterprise Linux infrastructure configuration and operational readiness.
Implement and maintain Ubuntu Linux security configurations aligned with applicable DoD cybersecurity requirements.
Use the Ubuntu Security Guide (USG) to support automated security hardening and compliance validation.
Configure systems in accordance with applicable DISA STIGs and CIS Benchmarks.
Review vulnerability scan results, identify deficiencies, implement remediation, and validate remediation effectiveness through follow-up scans and configuration reviews.
Troubleshoot security configuration conflicts that affect operational functionality and support secure baselines, access controls, audit logging, and system integrity requirements.
Coordinate with cybersecurity personnel to keep system configurations aligned with established security requirements.
Serve as the primary Tier II escalation resource for complex Ubuntu Linux issues; conduct advanced troubleshooting and root-cause analysis before requesting Tier III assistance.
Document technical findings, troubleshooting activities, and recommended corrective actions; coordinate Tier III escalations through established processes and track issues through resolution.
Validate that Tier III corrective actions resolve underlying issues and remain effective.
Provide hands-on technical support to remote Field Engineers and Dedicated Support Engineers as needed, and assist with approved Tier III or engineering recommendations.
Maintain technical documentation, configuration records, troubleshooting procedures, and engineering findings; develop and improve runbooks and operational procedures.
Document patch validation, regression testing, security hardening, and vulnerability remediation activities.
Track escalated issues, resolution status, and outstanding engineering risks.
Provide monthly operational reporting inputs covering Tier II requests, Tier III escalations, on-site responses, patching, inventory changes, and unresolved risks.
Recommend improvements to Linux administration, security compliance, and operational efficiency.