Linux Support Technician - Tier II

IPSecure•San Antonio, TX

21h•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 experience administering Ubuntu systems in production, advanced troubleshooting, security hardening, enterprise patch management, and virtualization. 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. The technician provides advanced Linux administration and operational support; manages Ubuntu Pro, ESM, Livepatch, and patch deployments through Landscape; supports MAAS, LXD, and KVM infrastructure; and implements security configurations aligned with DoD requirements, DISA STIGs, and CIS Benchmarks. The role includes investigating system and security issues, coordinating and tracking escalations, maintaining technical documentation and runbooks, and contributing to monthly operational reporting.

Requirements

At least 5 years of hands-on Linux systems administration or engineering experience.
At least 3 years 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 performing 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.
Required 8140 certification (Security+).
Ability to obtain and maintain the required TS/SCI clearance, as indicated by the job title.

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; identify corrective actions to improve system stability, security, and performance.
Analyze system logs, kernel messages, resource utilization, and performance metrics to diagnose technical issues.
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, conduct regression testing, and manage patch deployment campaigns through Landscape.
Monitor patch compliance, troubleshoot failed or problematic updates, and maintain patching and remediation documentation.
Administer and troubleshoot MAAS commissioning and provisioning, LXD configuration and operations, and KVM virtualization environments.
Investigate hardware compatibility, firmware, driver, and operating-system integration issues; assist with hardware readiness, physical access, and approved updates or recommendations.
Support enterprise Linux infrastructure configuration and operational readiness.
Implement and maintain Ubuntu security configurations aligned with DoD requirements, using Ubuntu Security Guide (USG), DISA STIGs, and CIS Benchmarks as applicable.
Review vulnerability scan results, remediate security deficiencies, and validate remediation through follow-up scans and configuration reviews.
Support secure configuration baselines, access controls, audit logging, and system integrity requirements in coordination with cybersecurity personnel.
Serve as the primary Tier II escalation resource; document findings and corrective actions, coordinate Tier III escalations, retain technical ownership, and track issues through resolution.
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.
Track escalations, resolution status, and outstanding engineering risks.
Provide monthly operational reporting inputs covering support requests, escalations, on-site responses, patching, inventory changes, and unresolved risks.
Recommend improvements to Linux administration, security compliance, and operational efficiency.