{"id":3937709,"url":"https://alion.io/job/dxc-technology-linux-engineer-secure-on-site-hampshire","title":"Linux Engineer - Secure - on-site Hampshire","company":{"id":88,"name":"DXC Technology","domain":"dxc.com","url":"https://alion.io/company/dxc-technology","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":78,"open_postings":213,"ghost_share":0.005,"stale_share":0.859,"repost_share":0.028,"time_to_fill_p50_days":29,"computed_at":"2026-11-10T06:52:35Z"}},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Farnborough, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon EC2","optional":false},{"name":"Ansible","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"Bash","optional":false},{"name":"CAPA","optional":false},{"name":"CentOS Stream","optional":false},{"name":"Chef","optional":false},{"name":"CI/CD","optional":false},{"name":"Configuration Management","optional":false},{"name":"Docker","optional":false},{"name":"GCP","optional":false},{"name":"GitOps","optional":false},{"name":"Grafana","optional":false},{"name":"Immutable Infrastructure","optional":false},{"name":"ISO 27001","optional":false},{"name":"ITIL","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"MariaDB","optional":false},{"name":"MySQL","optional":false},{"name":"Nagios","optional":false},{"name":"OpenShift","optional":false},{"name":"Oracle","optional":false},{"name":"Podman","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Prometheus","optional":false},{"name":"Puppet","optional":false},{"name":"Python","optional":false},{"name":"Red Hat","optional":false},{"name":"SaltStack","optional":false},{"name":"Splunk","optional":false},{"name":"Tcpdump","optional":false},{"name":"Zabbix","optional":false}],"status":"live","first_seen_at":"2026-11-05T00:00:00Z","employer_posted_date":"2026-11-05","last_verified_at":"2026-11-10T10:08:45Z","board_verified":true,"closed_at":null,"days_open":5,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":5},"description":"Job Description:\nRole Summary\nThe ITO Linux Engineer (Level 3) is the Linux technical authority across DXC-managed customer environments, accountable for platform integrity, complex troubleshooting, performance optimisation and architectural improvements for mission-critical workloads. They design, validate and maintain secure OS baselines and oversee patching and vulnerability management to ensure stability, security, performance and audit readiness in regulated environments.\nThey own major Linux incidents and root-cause analysis, advising on clustering, high availability, disaster recovery configurations, kernel tuning, storage integrations and network dependencies. They automate operations using advanced shell scripting and infrastructure-as-code, approve high-risk changes following review, and mentor junior engineers to build capability and consistency.\nBridging operations and engineering, they support lifecycle planning, platform modernisation and integration with automation, monitoring and configuration management tools. They partner with security and compliance teams to enforce enterprise hardening standards and maintain audit-ready documentation and evidence. The role demands deep technical expertise, architectural judgement and calm, authoritative decision-making under pressure in regulated, mission-critical environments.\nDue to the nature of the work and the customers we support, the successful candidate must be eligible to meet UK Government and contractual personnel security requirements, including the applicable residency requirements for the role, and have the right to work in the United Kingdom. Some roles may also be subject to nationality requirements where these are necessary to meet UK Government or contractual security obligations.\nPlease note the roles will require attendance on-site in Hampshire 5 days a week.\nKey Responsibilities\nLead Linux capacity planning from CPU, memory, disk, I/O, swap and network trends, recommending scaling, consolidation or platform refresh.\nDefine and regularly review secure RHEL, CentOS, Oracle Linux and SUSE baselines aligned with CIS, STIGs or equivalent standards.\nPlan patching and vulnerability cycles, including sequencing, risk assessment and rollback, to maintain service continuity within constrained change windows.\nIdentify end-of-life distributions, kernels and dependencies and recommend upgrades or migrations to maintain supportability and compliance.\nMaintain accurate Linux CMDB records and configuration management discipline across operations and changes.\nAnalyse incidents, performance data and vulnerability scans to identify systemic weaknesses and improvement opportunities.\nOwn root-cause analysis for major and recurring incidents, implementing corrective actions and embedding prevention in procedures and baselines.\nAutomate repetitive tasks with advanced shell scripting, Ansible, Puppet or equivalent tools to improve consistency, accuracy and efficiency.\nUpdate runbooks, procedures and knowledge articles with current practice, known errors and lessons learned.\nEvaluate containerisation, immutable infrastructure and infrastructure-as-code, recommending adoption where reliability, security or efficiency improves.\nLead or support platform modernisation aligned with organisational strategy and industry best practice.\nAdvise customers, service delivery, security and compliance stakeholders in service reviews, governance forums and risk discussions.\nPartner with security teams to enforce hardening standards, deliver prioritised vulnerability remediation and maintain audit evidence.\nCoordinate with application, database, network, storage and virtualisation teams on Linux dependencies affecting performance, connectivity and high availability.\nLead major-incident technical bridges, updating incident managers and stakeholders on root cause, impact and recovery.\nMentor junior engineers through technical guidance, work reviews, knowledge sharing and structured development.\nDesign, validate and maintain secure OS baselines and repeatable, auditable builds that meet regulatory and contractual requirements.\nReview high-risk kernel, clustering, storage and baseline changes, assessing risk and giving technical approval before CAB submission.\nDesign, test and document clustering and HA using Pacemaker, Corosync, DRBD, Oracle RAC dependencies and application-level clustering, including failover.\nDesign and oversee enterprise storage integration across Fibre Channel, iSCSI, DM-Multipath, NFS and GFS2/OCFS2 shared storage.\nSupport OS upgrades, distribution migrations and the transition to automation, monitoring and configuration management tools.\nMaintain build templates, Kickstart/AutoYaST configurations and post-installation automation for consistent, hardened, audit-ready provisioning from first boot.\nDevelop Bash/Python scripts, Ansible playbooks, Puppet manifests or equivalent infrastructure-as-code for configuration, compliance, patch orchestration and reporting.\nConfigure and validate Fibre Channel SAN, iSCSI, DM-Multipath, NFS and GFS2/OCFS2 storage with appropriate redundancy and failover.\nTune sysctl, I/O schedulers, hugepages, swappiness, OOM behaviour, ulimits, cgroups and network parameters for mission-critical workloads.\nIntegrate monitoring (Nagios, Zabbix, Prometheus, SCOM, SolarWinds or equivalent), logging (rsyslog, ELK, Splunk) and configuration management for estate-wide visibility, alerting and compliance reporting.\nOwn major Linux incidents, directing investigation and resolution of kernel panics, cluster failovers, storage path failures, severe performance issues and security incidents.\nLead post-incident root-cause analysis, producing RCA reports, defining corrective and preventive actions and updating baselines, runbooks and procedures.\nResolve escalations beyond L2, including performance degradation, kernel faults, clustering/HA failures, multipath issues, authentication, certificates and cross-domain Linux, network, storage and application faults.\nAct as the Linux team’s final escalation point, providing authoritative technical guidance and decisions under pressure.\nOversee regulated Linux patching and vulnerability cycles, assessing, testing and deploying security errata, kernel updates and configuration fixes within agreed timescales and change processes.\nReview and approve high-risk changes before execution, assessing technical risk, impact and rollback readiness and providing required sign-off.\nMaintain audit-ready compliance reports, patch records, configuration snapshots, RCA reports and change evidence for internal and external reviews.\nMonitor clustering, HA and DR health and performance, validating failover readiness, replication health and quorum status.\nProactively analyse mission-critical workloads to address bottlenecks and tuning opportunities before service impact.\nRequired Skills & Experience\nEssential\nLinux Operations Experience. 5 - 10 years administering and engineering Linux in enterprise, mission-critical or regulated environments, with deep operational and architectural expertise in RHEL, CentOS, Oracle Linux or SUSE and proven ownership of complex outcomes across large production estates.\nAdvanced Troubleshooting. Expert troubleshooting across kernel, system, networking, storage, file systems, authentication and application dependencies, resolving panics, performance crises, storage failures, split-brain and cross-domain faults through structured RCA and crash, strace, perf, ftrace, SystemTap, tcpdump, blktrace, journalctl, dmesg and sar.\nClustering & High Availability. Deep expertise designing, validating and troubleshooting mission-critical HA using Pacemaker, Corosync, DRBD, fencing/STONITH, quorum management and resource agents, including failover testing and split-brain prevention.\nStorage Integration. Expert Linux storage integration and troubleshooting across Fibre Channel SAN, iSCSI, DM-Multipath, NFS and GFS2/OCFS2, covering HBA-to-file-system connectivity, path failures and performance issues.\nKernel Tuning & Performance Optimisation. Advanced workload profiling and bottleneck resolution through sysctl, I/O schedulers, hugepages, swappiness, OOM, NUMA, cgroups, resource limits and network tuning for mission-critical applications.\nSecurity Hardening & Compliance. Experience designing, validating and maintaining CIS/STIG-aligned or equivalent OS baselines, with proficiency in SELinux/AppArmor, FIPS, auditd and vulnerability remediation under contractual compliance and external assurance requirements.\nPatching & Vulnerability Management. Experience overseeing regulated Linux patching, including strategy, risk assessment, kernel updates and security errata through Red Hat Satellite, SUSE Manager or equivalent, within agreed timescales and change processes.\nAutomation & Infrastructure-as-Code. Advanced Bash/Python scripting and Ansible, Puppet, Chef or SaltStack experience to design and implement provisioning, configuration enforcement, compliance checks, patch orchestration and reporting at scale.\nNetworking. Strong Linux networking knowledge covering bonding/teaming, VLANs, routing, firewalld/nftables, TCP tuning and tcpdump/ss/ip/nmcli troubleshooting, including impacts on applications, storage connectivity and cluster communication.\nITIL Practices. Strong Incident, Problem, Change and Configuration Management knowledge, including major-incident ownership, RCA leadership, high-risk change approval, CMDB accuracy and audit-ready documentation.\nMajor Incident Ownership. Proven ownership of major Linux incidents, directing cross-team diagnostics and resolution under pressure, producing detailed RCA reports and ensuring corrective action.\nMentoring & Technical Leadership. Experience mentoring junior engineers through technical guidance, work reviews and incident/change coaching, with commitment to developing L2 capability and reducing escalations.\nDocumentation & Audit Readiness. Ability to maintain accurate, controlled and accessible technical documentation, RCA reports, baseline evidence and compliance artefacts for internal and external audits.\nChange Review & Approval. Experience approving high-risk changes through technical risk, impact, dependency and rollback assessments and formal technical sign-off.\nDesired:\nCertifications. RHCE, RHCA, Red Hat Certified Specialist in High Availability Clustering or Linux Performance Tuning, SUSE Certified Engineer (SCE), or equivalent advanced Linux certification.\nITIL 4 Foundation. ITIL 4 Foundation certification or higher, demonstrating knowledge of ITIL 4 practices and the service value chain.\nContainerisation & Orchestration. Docker, Podman, Kubernetes and OpenShift experience covering production Linux engineering, resource management, security and troubleshooting.\nCloud Platforms. Linux administration on AWS EC2, Azure VMs and GCP Compute Engine, including cloud networking, storage, identity integration and operational differences from on-premises workloads.\nDR & Resilience. Experience designing and validating Linux disaster recovery, including replication, backups and recovery procedures aligned with RTO/RPO targets.\nMonitoring & Observability. Deep Nagios, Zabbix, Prometheus/Grafana, ELK and Splunk experience, including custom checks, alert design and Linux performance dashboards.\nDatabase Platform Awareness. Working knowledge of Oracle, PostgreSQL and MySQL/MariaDB and their Linux configuration, tuning and storage requirements for performance and availability.\nCI/CD & DevOps Practices. Familiarity with Linux CI/CD, GitOps and DevOps, including automated testing, pipeline-driven configuration deployment and version-controlled infrastructure.\nPlatform Modernisation. Experience supporting or leading OS upgrades, distribution migrations, immutable infrastructure adoption and transitions from legacy to modern operational tools.\nCompliance & Governance. Awareness of ISO 27001, Cyber Essentials, NIST and JSP 440/604 and their Linu...","description_format":"text","description_chars":13051,"description_truncated":true,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","Managed IT Services (MSP)","Systems Integrators"],"lifecycle":[{"event":"open","at":"2026-11-08T09:46:45Z"}],"visa":[],"liveness":{"score":63,"band":"ok","label":"Likely open","p_open":1,"p_active":0.632,"p_room":1,"age_days":5,"expected_fill_days":29,"reasons":["conf:2","stale_co","velocity","win:early","comp:brand"],"computed_at":"2026-11-10T06:52:35Z"},"pay":null,"html_url":"https://alion.io/job/dxc-technology-linux-engineer-secure-on-site-hampshire","json_url":"https://alion.io/job/dxc-technology-linux-engineer-secure-on-site-hampshire.json","meta":{"generated_at":"2026-11-10T10:39:52Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":24812,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-11T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":88},"rest":"https://alion.io/mcp/rest/get_company?id=88"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fdxc-technology-linux-engineer-secure-on-site-hampshire"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fdxc-technology-linux-engineer-secure-on-site-hampshire"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fdxc-technology-linux-engineer-secure-on-site-hampshire"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/dxc-technology-linux-engineer-secure-on-site-hampshire\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fdxc-technology-linux-engineer-secure-on-site-hampshire"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3937709}},{"tool":"search_jobs","arguments":{"company":"dxc.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3937709},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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