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Job Description – Linux L3 System Administrator Job Summary The Linux L3 System Administrator is responsible for advanced administration, architecture, automation, and support of enterprise Linux environments across on-premises and cloud platforms. The role focuses on infrastructure automation using Terraform, container platform administration, cloud provisioning, performance optimization, and providing technical leadership for complex incidents and infrastructure transformation initiatives. Key Responsibilities Provide L3-level support for Linux operating systems including RHEL, Oracle Linux, Rocky Linux, and CentOS. Act as the final escalation point for complex operating system, performance, and infrastructure issues. Design, deploy, and maintain highly available Linux platforms in physical, virtual, and cloud environments. Develop and manage Infrastructure as Code (IaC) solutions using Terraform. Create, maintain, and optimize Terraform modules, workspaces, and state management processes. Automate infrastructure provisioning across Azure, AWS, OCI, or hybrid cloud environments. Administer and support Kubernetes/OpenShift container platforms. Deploy, monitor, troubleshoot, and upgrade Kubernetes clusters and worker nodes. Implement automation using Ansible, Terraform, Shell scripting, and Python. Manage Linux storage technologies including LVM, Multipathing, SAN/NAS integrations, and enterprise storage solutions. Lead OS patching, upgrades, lifecycle management, and vulnerability remediation activities. Drive security hardening and compliance initiatives across Linux and cloud environments. Analyze system performance and perform proactive capacity planning and tuning. Support VMware and enterprise virtualization platforms. Collaborate with application, database, network, cloud, and security teams on solution design and implementation. Participate in major incident management, root cause analysis, and problem management activities. Mentor L1/L2 engineers and contribute to documentation, SOPs, and best practices. Participate in 24x7 on-call support and planned maintenance activities. Required Skills & Experience 8–10+ years of enterprise Linux administration experience. Strong expertise in: Red Hat Enterprise Linux (RHEL) Oracle Linux Rocky Linux Hands-on experience with Terraform for infrastructure provisioning and lifecycle management. Experience creating reusable Terraform modules and managing remote state backends. Strong knowledge of Infrastructure as Code (IaC) principles and DevOps practices. Experience with Kubernetes and/or OpenShift administration. Proficiency with Ansible automation. Strong Shell scripting (Bash) and Python skills. Experience with: LVM Multipathing (DM-Multipath/PowerPath) SAN/NAS Storage Enterprise Backup Solutions Advanced Linux troubleshooting and performance tuning experience. Strong understanding of networking concepts: DNS TCP/IP VLANs Bonding Load Balancing Experience with ServiceNow or similar ITSM tools. Experience working in mission-critical 24x7 production environments. Preferred Qualifications RHCE / RHCA certification. HashiCorp Terraform Associate certification. Certified Kubernetes Administrator (CKA). Red Hat OpenShift Certification. Azure Administrator, AWS SysOps, or OCI certifications. Experience with GitHub, GitLab, Jenkins, or Azure DevOps pipelines. Exposure to GitOps tools such as ArgoCD or FluxCD. Experience supporting cloud-native and microservices-based environments. ITIL Foundation certification. Professional Attributes Strong ownership mindset and decision‑making capabilities Ability to handle high‑pressure, business‑critical incidents Excellent communication and stakeholder management skills Passion for automation, standardization, and continuous improvement
Here's how to pick the right one and stand out in your application.
144.883Jobs
31.687IN
81%EN
That number is real. WorkMundi's database shows 144,883 open engineer roles across the world. India has the most with 31,687 jobs, followed by the United States with 30,084. If you just finished reading one job ad and felt paralyzed by choice, you're not alone—but this scale is actually an advantage. It means you can afford to be selective.
Start by geography and language. The majority of engineer ads—117,837 of them—have the job posting text written in English. Use that as one filter, but remember: the ad text language tells you nothing about whether the role actually requires you to speak English day-to-day. Read the job description carefully. Then check which countries have the volume you're targeting. Singapore, Poland, and Australia round out the top five after India and the US.
Next, learn who's hiring. Accenture has posted 2,801 engineer roles. andurilindustries, speechify, and jobgether are also actively recruiting. If you're applying to one of these names, research their hiring patterns and interview style before you apply. That homework pays off.
When you interview, expect the question every engineer hears: 'Tell me about a time you had to debug a problem that wasn't in your job description.' Have a specific story ready—not a general one. Name the tools, the deadline pressure, and what you learned. Hiring managers listen for whether you see problem-solving as part of the role itself, not a favour.