DV Cleared Linux Infrastructure Engineer

We're looking for an experienced Linux Infrastructure Engineer with active DV clearance to support a highly secure, business-critical infrastructure environment within a major public-sector programme.

You'll join an enterprise infrastructure team responsible for the stability, security and performance of a complex on-premises Linux estate. This is a hands-on engineering role combining advanced second- and third-line support with infrastructure improvement and project delivery.

You'll take ownership of complex technical issues, support critical Linux services and contribute to platform upgrades, vulnerability remediation, resilience and service improvement within a tightly controlled environment.

Key Responsibilities

• Provide advanced 2nd/3rd-line support for enterprise Linux infrastructure, taking ownership of complex incidents through to resolution.

• Administer, build, configure, patch and upgrade Red Hat Enterprise Linux (RHEL) and Ubuntu Server environments.

• Troubleshoot operating-system, Kernel, performance, networking, storage and file-system issues.

• Support highly available and clustered Linux services, including Veritas Cluster Server (VCS) and Red Hat Resilient Storage/GFS2.

• Manage enterprise storage and volume technologies, including VXFS, ZFS, XFS, EXT3/4, UFS, SVM, VXVM and LVM.

• Support storage replication, disaster recovery and resilience activities, including SRDF and STAR.

• Maintain system security, access controls, audit logging and compliance requirements, including LDAP, CyberArk and SCCM.

• Investigate recurring faults, perform root-cause analysis and implement preventative improvements.

• Support Linux workloads on VMware or comparable virtualisation platforms.

• Contribute to infrastructure upgrades, obsolescence remediation, automation and service transition.

• Maintain technical documentation and follow established incident, problem, change and configuration management processes.

• Work collaboratively with infrastructure, networking, storage, security and application teams to resolve complex technical issues.

Essential Skills & Experience

• Active DV clearance - essential.

• Strong experience in a senior Linux Infrastructure Engineer or 2nd/3rd-line Linux support role.

• Hands-on administration and troubleshooting of Red Hat Enterprise Linux and Ubuntu Server.

• Experience supporting large-scale, business-critical Linux environments, including Legacy platforms.

• Strong knowledge of Linux system administration, patching, upgrades, security hardening, logging and auditing.

• Practical experience with Veritas Cluster Server and/or Red Hat Resilient Storage/GFS2.

• Knowledge of enterprise file systems and volume management, including VXFS, ZFS, XFS and LVM.

• Experience with enterprise storage replication and disaster recovery, ideally SRDF and STAR.

• Familiarity with VMware virtualisation, LDAP, CyberArk and SCCM.

• Strong networking fundamentals, including TCP/IP, DNS, routing, Firewalls and connectivity troubleshooting.

• Understanding of container technologies and their interaction with the underlying Linux operating system.

• Excellent diagnostic skills and the ability to resolve complex infrastructure issues in a secure, controlled environment.

• A methodical approach to incident management, technical documentation and change control.

Why Apply?

This is an opportunity to work on a technically demanding infrastructure assignment within a highly secure environment, supporting critical services where reliability, security and technical expertise matter.