Responsibilities

CHAOS Industries is looking for a Senior IT Systems Administrator with deep Linux expertise to design, build, secure, and operate the Linux infrastructure our engineering and program teams depend on. You will keep servers, services, and cloud workloads reliable, patched, and compliant in a defense environment where uptime and data protection are both non-negotiable. As a senior member of the IT organization, you will act as a technical lead for Linux systems engineering: setting standards, owning the hardest problems, and mentoring teammates, while partnering with cybersecurity, service desk, engineering, and program teams.
Team mandate: keep the Linux platforms running reliably, securely, and predictably, and automate everything repeatable so the team can spend its time on improvements. You will be the escalation point for complex systems issues and a trusted advisor on infrastructure decisions.
Ownership: technical ownership of the Linux server environment, including architecture, configuration management, patching, monitoring, backup and recovery, and hardening, plus leadership of infrastructure projects such as platform migrations, new site standups, and environment consolidations as the company grows.
Architect, administer, and maintain Linux server environments (physical, virtual, and cloud), including provisioning, configuration, patching, monitoring, and lifecycle management across Red Hat-family and Debian-family distributions.
Design and maintain automation and configuration management using Ansible, shell, and Python to standardize builds, enforce configuration, and streamline patching, reporting, and routine administration.
Build and maintain hardened, standardized server images and templates aligned to security baselines such as DISA STIG and CIS benchmarks, including SELinux, auditd, and FIPS-validated cryptography where required.
Manage Linux storage and networking, including LVM, file systems, NFS, DNS, firewalls, and system tuning for performance and capacity.
Integrate Linux systems with enterprise identity services (Active Directory, LDAP, Kerberos, SSSD) and enforce SSH key management, sudo policy, MFA, and privileged access controls.
Deploy and manage Linux workloads in virtualized and cloud environments, including Azure and AWS virtual machines, and support containerized workloads where applicable.
Serve as technical lead and final escalation point for complex incidents; perform root-cause analysis and drive permanent fixes.
Mentor and coach junior systems administrators and service desk staff, and set technical standards, best practices, and peer review for the team.
Lead infrastructure projects from planning through delivery, including platform migrations, site buildouts, and the integration of newly acquired environments.

Senior IT Systems Administrator (Linux Admin) at Chaos Industries · LumiJobs

Senior IT Systems Administrator (Linux Admin)

Responsibilities

Qualification

Preferred

Benefits

Company

Chaos Industries

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