{"id":3740109,"url":"https://alion.io/job/sagl-consulting-senior-linux-openshift-infrastructure-engineer-l2l3","title":"Senior Linux & OpenShift Infrastructure Engineer (L2/L3)","company":{"id":3808230,"name":"Sagl Consulting","domain":"saglconsulting.com","url":"https://alion.io/company/sagl-consulting","size_band":null,"is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"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":["Singapore"],"countries":["SG"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":8000,"max":10000,"currency":"SGD","period":"month","gross":true,"usd_annual":93672},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Active Directory","optional":false},{"name":"Ansible","optional":false},{"name":"Apache HTTP Server","optional":false},{"name":"AWS","optional":false},{"name":"Bash","optional":false},{"name":"CI/CD","optional":false},{"name":"ElasticSearch","optional":false},{"name":"ITIL","optional":false},{"name":"ITSM","optional":false},{"name":"Kibana","optional":false},{"name":"Linux","optional":false},{"name":"Logstash","optional":false},{"name":"MS SQL","optional":false},{"name":"OpenShift","optional":false},{"name":"PowerShell","optional":false},{"name":"Python","optional":false},{"name":"Red Hat","optional":false},{"name":"ServiceNow","optional":false},{"name":"SQL","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-11-04T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-11-04T00:00:00Z","board_verified":false,"closed_at":null,"days_open":6,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":6},"description":"Job DescriptionWe are seeking an experienced Infrastructure Engineer to provide L2/L3 technical support and administration across Linux, Red Hat OpenShift and enterprise infrastructure environments. The role involves managing production infrastructure, troubleshooting complex technical issues, maintaining platform availability and supporting infrastructure automation.\nKey ResponsibilitiesAdminister and troubleshoot Red Hat Enterprise Linux (RHEL) servers, including installation, configuration, patching and security hardening.\n\nManage and support Red Hat OpenShift Container Platform (OCP), including cluster operations, application deployments, upgrades and platform monitoring.\n\nInvestigate and resolve L2/L3 infrastructure incidents and service requests within agreed SLAs.\n\nPerform system performance monitoring, capacity analysis and root cause analysis.\n\nSupport AWS infrastructure, Nutanix environments and Apache web servers.\n\nManage infrastructure changes, maintenance activities and patching in accordance with change management procedures.\n\nMonitor infrastructure using ELK Stack (Elasticsearch, Logstash and Kibana) and other monitoring tools.\n\nDevelop scripts and automation using Ansible, Bash, Python or PowerShell.\n\nSupport infrastructure integrations through APIs, JSON and CI/CD workflows.\n\nTroubleshoot infrastructure issues involving F5 load balancers, SNMP and related technologies.\n\nMaintain technical documentation, operational procedures and knowledge articles.\n\nCoordinate with internal technical teams, vendors and third-party service providers.\n\nIdentify recurring incidents and automation opportunities to improve infrastructure reliability and operational efficiency.\n\nSupport disaster recovery activities and testing where required.\n\nRequirementsHands-on experience in Linux system administration, particularly Red Hat Enterprise Linux (RHEL).\n\nMandatory hands-on experience in Red Hat OpenShift Container Platform administration, including cluster management, deployment, monitoring, upgrades and troubleshooting.\n\nExperience supporting Linux and OpenShift platforms in production managed-services environments.\n\nStrong knowledge of Linux installation, configuration, patching, security hardening and performance troubleshooting.\n\nFamiliarity with AWS administration, Nutanix, Apache web servers and BigFix.\n\nWorking knowledge of infrastructure monitoring and ELK Stack.\n\nExperience with scripting and automation using Ansible, Bash, Python or PowerShell.\n\nKnowledge of Windows infrastructure technologies, including Active Directory Domain Services and SQL Server.\n\nFamiliarity with F5 load balancers, SNMP, APIs, JSON and CI/CD processes.\n\nExperience with ITIL-based incident, problem, change and service request management.\n\nWorking knowledge of ServiceNow or other ITSM ticketing platforms.\n\nBachelor's degree in IT, Computer Science or equivalent qualification.\n\nMandatory CertificationsRed Hat certification relevant to Linux System Administration.\n\nRed Hat OpenShift Container Platform (OCP) certification relevant to OpenShift Administration.\n\n#Openshift\nSkills\nInfrastructure Monitoring, Maintenance Management, Linux System Administration, Openshift, Apache Web Server, PowerShell, Root Cause Analysis, monitoring SLAs, Microsoft SQL Servers, Bash, Monitoring, Applying Patches, ElasticSearch, Red Hat Enterprise Linux, Ansible, Deployment, Application Deployment","description_format":"text","description_chars":3409,"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":[],"lifecycle":[{"event":"open","at":"2026-11-04T10:41:21Z"}],"visa":[],"liveness":{"score":54,"band":"ok","label":"Likely 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