{"id":4093726,"url":"https://alion.io/job/netrio-senior-linux-infrastructure-engineer","title":"Senior Linux Infrastructure Engineer","company":{"id":678445,"name":"Netrio","domain":"netrio.com","url":"https://alion.io/company/netrio","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Rippling","truth_index":{"grade":"B","score":84,"open_postings":11,"ghost_share":0.182,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":69,"computed_at":"2026-11-11T05:49:22Z"}},"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":["Belfast, 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":"Active Directory","optional":false},{"name":"Amazon EC2","optional":false},{"name":"Ansible","optional":false},{"name":"AWS","optional":false},{"name":"Bash","optional":false},{"name":"CI/CD","optional":false},{"name":"CIS Benchmarks","optional":false},{"name":"Configuration Management","optional":false},{"name":"Docker","optional":false},{"name":"GitLab","optional":false},{"name":"GitLab CI","optional":false},{"name":"GitOps","optional":false},{"name":"Grafana","optional":false},{"name":"HashiCorp Vault","optional":false},{"name":"Helm","optional":false},{"name":"IAM","optional":false},{"name":"Kubernetes","optional":false},{"name":"KVM","optional":false},{"name":"LDAP","optional":false},{"name":"Least Privilege","optional":false},{"name":"Linux","optional":false},{"name":"OpenTofu","optional":false},{"name":"PKI","optional":false},{"name":"Prometheus","optional":false},{"name":"Python","optional":false},{"name":"Red Hat","optional":false},{"name":"SIEM","optional":false},{"name":"SOC 2","optional":false},{"name":"Tanium","optional":false},{"name":"Terraform","optional":false},{"name":"Ubuntu","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-11-11T15:55:43Z","employer_posted_date":"2026-11-11","last_verified_at":"2026-11-12T02:20:07Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"About Netrio\nNetrio is a leading MSP in North America, specializing in IT solutions for small- to mid-market enterprises. We serve over 1,000 clients across industries with services including managed IT, cybersecurity, cloud, connectivity, voice, and custom application development.\nAbout the role\nWe are seeking an experienced Senior Linux Infrastructure Engineer to maintain, secure, troubleshoot, and improve enterprise Linux infrastructure in a high-availability financial technology environment.\nThis hands-on position supports Linux servers, Kubernetes-based applications, identity and access management, patching, automation, and software development teams. The engineer will also provide secondary support for AWS, certificate management, and related infrastructure services.\nThe ideal candidate is a self-starter who takes ownership of their systems and projects, works effectively independently or collaboratively, and approaches troubleshooting with an understanding of the entire technology environment. This position is essential to strengthening operational coverage, reducing single-person dependencies, and supporting expanding trading operations.\nWhat you'll do\nLinux infrastructure and systems administration\nAdminister, maintain, secure, and troubleshoot enterprise Linux environments, primarily RHEL and Ubuntu.\nSupport physical servers, virtual machines, storage, networking, and Linux-based applications.\nManage operating system patching, upgrades, performance, capacity, and lifecycle management.\nAdminister Linux virtualization technologies, including KVM.\nMaintain reliable, documented, and recoverable production infrastructure.\nDevelop standardized configurations, operational procedures, and automation.\nIdentity, access management, and RBAC\nIntegrate Linux authentication and authorization with Microsoft Active Directory using SSSD, realmd, Kerberos, LDAP/LDAPS, or equivalent technologies.\nImplement centralized, group-based access management and least-privilege permissions.\nManage sudo policies, SSH access, service accounts, administrative privileges, and Linux RBAC-equivalent controls.\nSupport account provisioning, deprovisioning, periodic access reviews, and access auditing.\nCollaborate with Windows and identity engineering teams to maintain consistent access controls across platforms.\nPatching and configuration management\nManage Linux patching using enterprise patch-management or configuration-management platforms.\nMaintain package repositories, patch schedules, compliance reporting, and remediation tracking.\nEvaluate security updates, test changes, coordinate production patching, and verify results.\nAutomate patch deployments and validation where appropriate.\nMaintain approved security baselines and consistent system configurations.\nKubernetes and container support\nSupport and troubleshoot production Kubernetes clusters and containerized applications.\nDiagnose issues involving nodes, pods, deployments, networking, storage, ingress, resource utilization, and cluster services.\nDistinguish platform and infrastructure problems from application-level failures.\nAdminister Kubernetes RBAC, namespaces, service accounts, and access permissions.\nSupport cluster monitoring, upgrades, backup, and recovery.\nCollaborate with development teams on deployment issues and incident resolution.\nSoftware development and DevOps support\nProvide Linux, container, and infrastructure support to software development teams.\nAssist with application deployment, troubleshooting, and performance optimization.\nSupport GitLab, CI/CD pipelines, container registries, and development tooling.\nHelp maintain consistent development, testing, and production environments.\nSupport Infrastructure as Code and deployment automation initiatives.\nCloud, certificates, and supporting services\nProvide operational support for AWS infrastructure, including EC2, IAM, VPC networking, and related services.\nAssist with certificate issuance, renewal, troubleshooting, and lifecycle management.\nSupport PKI, TLS configurations, and secrets-management platforms such as HashiCorp Vault.\nDevelop sufficient cross-training and documentation to provide independent coverage for critical services.\nOperational reliability and continuous improvement\nIndependently investigate and resolve production issues across applications, operating systems, virtualization, networking, and storage.\nTake ownership of assigned incidents and projects through resolution and verification.\nPerform root-cause analysis, participate in post-incident reviews, and implement corrective improvements.\nIdentify infrastructure risks and proactively recommend improvements.\nImprove monitoring, documentation, automation, and operational procedures.\nParticipate in change management, disaster recovery testing, and business continuity planning.\nSupport production infrastructure during assigned trading hours and scheduled on-call coverage.\nCompliance and security\nSupport infrastructure controls aligned with SOC 2 Trust Services Criteria and organizational security policies.\nMaintain audit evidence supporting access management, patching, change control, logging, and operational procedures.\nParticipate in SOC 2 readiness assessments, audits, remediation, and control improvements.\nApply approved security configurations and vulnerability remediation procedures.\nCollaborate with cybersecurity leadership on infrastructure risks and improvements.\nCollaboration, documentation, and mentorship\nWork independently and collaboratively across infrastructure, networking, cybersecurity, and software development teams.\nMaintain clear documentation, runbooks, and system configuration records.\nShare knowledge and participate in cross-training to reduce single-person dependencies.\nWillingly mentor colleagues, provide technical guidance, and contribute to team development.\nCommunicate progress, risks, technical findings, and recommended improvements.\nQualifications\nRequired\n5+ years of professional Linux systems engineering or administration experience, or equivalent demonstrated expertise.\nStrong RHEL administration and troubleshooting experience; familiarity with Ubuntu or comparable Linux distributions.\nExperience integrating Linux authentication and access management with Microsoft Active Directory.\nStrong understanding of Linux permissions, sudo, SSH, PAM, Kerberos, and group-based access management.\nExperience using an enterprise Linux patch-management or configuration-management platform, including patch deployment, compliance reporting, and remediation.\nHands-on experience supporting and troubleshooting Kubernetes clusters and containerized applications.\nAbility to distinguish application problems from operating system, Kubernetes, networking, storage, and other infrastructure issues.\nExperience supporting software development teams and application deployment environments.\nExperience with Bash, Python, Ansible, or comparable scripting and automation technologies.\nWorking knowledge of AWS infrastructure and cloud operations.\nExperience working in, supporting, or preparing an organization for a SOC 2 audit or comparable controls-based compliance program.\nExperience with production change management, incident response, and operational documentation.\nStrong analytical, communication, collaboration, and independent problem-solving skills.\nWillingness to mentor colleagues and share technical knowledge.\nPreferred\nHands-on experience with Red Hat Satellite for Linux lifecycle and patch management.\nExperience with Tanium for endpoint management, patching, inventory, or compliance.\nAdvanced Kubernetes administration, security, RBAC, and cluster troubleshooting.\nExperience with GitLab CI/CD, Docker, Helm, Terraform, OpenTofu, or GitOps.\nExperience with enterprise PKI, certificate automation, and HashiCorp Vault.\nExperience with KVM virtualization and multi-datacenter infrastructure.\nFamiliarity with Prometheus, Grafana, centralized logging, and SIEM integration.\nBackground in cybersecurity best practices, Linux hardening, vulnerability management, and secure infrastructure design.\nExperience with CIS benchmarks, SELinux, auditd, and privileged access management.\nExperience supporting highly available financial technology or trading infrastructure.\nRelevant certifications such as RHCE, CKA, or AWS certifications.","description_format":"text","description_chars":8341,"description_truncated":false,"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":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Information Technology","Information Security","Managed IT Services 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