IT Systems Administrator (Linux Admin)

Job description

Job responsibilities

• Architect, administer, and maintain Linux server environments (physical, virtual, and cloud), including provisioning, configuration, patching, monitoring, and lifecycle management across Red Hat-family and…
• 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.

Job requirements

• Minimum education: Bachelor’s degree in Information Technology, Computer Science, Information Systems, or another related field or equivalent work experience
• 3+ years of progressive experience administering enterprise Linux server environments (such as RHEL, Rocky, CentOS, Ubuntu, or Debian).
• Expert command-line and troubleshooting skills, with deep knowledge of systemd, networking, storage (LVM, file systems, NFS), and performance tuning.
• Strong scripting and automation skills in Bash and Python, and experience with configuration management tools such as Ansible.
• Experience hardening Linux systems and remediating vulnerabilities in a regulated environment, including SELinux, auditd, DISA STIG or CIS baselines, and NIST SP 800-171 or CMMC requirements.
• Experience integrating Linux with enterprise identity (Active Directory, LDAP, Kerberos, SSSD) and managing SSH, sudo, and privileged access.
• Experience owning patch management, monitoring, and backup and disaster recovery, including testing restores and meeting recovery objectives.
• Track record of leading infrastructure projects and mentoring other engineers, with strong documentation and communication skills.