Linux Engineer - Secure - On-site Hampshire

Location: On-site in Hampshire, United Kingdom, 5 days per week. Candidates must have the right to work in the United Kingdom and meet applicable UK Government and contractual personnel security and residency requirements; nationality requirements may apply.

Company

hirify.global provides managed technology and infrastructure services for customer environments, including regulated and mission-critical workloads.

What you will do

• Act as the Linux technical authority and final escalation point across large enterprise estates.
• Design, validate and maintain secure RHEL, CentOS, Oracle Linux and SUSE baselines aligned with CIS, STIGs or equivalent standards.
• Own major incidents, complex troubleshooting and root-cause analysis across kernels, networking, storage, filesystems, authentication, applications and clusters.
• Design and support Pacemaker, Corosync, DRBD, fencing, quorum, failover, disaster recovery and shared-storage solutions.
• Lead capacity planning, kernel and workload tuning, patching, vulnerability remediation, lifecycle planning and platform modernisation.
• Automate provisioning, configuration, compliance, patching and reporting with Bash, Python, Ansible, Puppet or equivalent infrastructure-as-code tools; mentor junior engineers and advise security, compliance and customer stakeholders.

Requirements

• 5–10 years administering and engineering Linux in enterprise, mission-critical or regulated environments, with deep expertise in RHEL, CentOS, Oracle Linux or SUSE and ownership of complex production outcomes.
• Expert troubleshooting across kernel, system, networking, storage, filesystems, authentication and application dependencies, including crash, strace, perf, ftrace, SystemTap, tcpdump, blktrace, journalctl, dmesg and sar.
• Deep expertise designing and troubleshooting high availability with Pacemaker, Corosync, DRBD, fencing/STONITH, quorum management, resource agents, failover testing and split-brain prevention.
• Expert integration and troubleshooting of Fibre Channel SAN, iSCSI, DM-Multipath, NFS and GFS2/OCFS2 storage.
• Advanced performance optimisation using sysctl, I/O schedulers, hugepages, swappiness, OOM, NUMA, cgroups, resource limits and network tuning.
• Experience with CIS/STIG-aligned or equivalent secure OS baselines, SELinux/AppArmor, FIPS, auditd and vulnerability remediation.
• Experience overseeing regulated patching and security errata through Red Hat Satellite, SUSE Manager or equivalent.
• Advanced Bash/Python scripting and Ansible, Puppet, Chef or SaltStack for provisioning, configuration enforcement, compliance, patch orchestration and reporting.
• Strong Linux networking and ITIL Incident, Problem, Change and Configuration Management knowledge, including major-incident ownership, high-risk change approval, CMDB accuracy, mentoring and audit-ready documentation.
• Must have the right to work in the United Kingdom and meet applicable UK Government and contractual personnel security, residency and potentially nationality requirements.

Nice to have

• RHCE, RHCA, Red Hat Specialist, SUSE Certified Engineer or equivalent advanced Linux certification; ITIL 4 Foundation or higher.
• Docker, Podman, Kubernetes, OpenShift, AWS EC2, Azure VMs, GCP Compute Engine, Linux disaster recovery and RTO/RPO experience.
• Nagios, Zabbix, Prometheus/Grafana, ELK, Splunk, Oracle, PostgreSQL, MySQL/MariaDB, CI/CD, GitOps and DevOps experience.
• Platform modernisation, immutable infrastructure, distribution migrations and knowledge of ISO 27001, Cyber Essentials, NIST or JSP 440/604.

Culture & Benefits

• In-person collaboration is prioritised, with flexibility intended to support wellbeing, productivity, individual work styles and life circumstances.
• Inclusive working environment focused on strong connections and community.
• Full-time employment with required on-site attendance in Hampshire five days per week.