Server Administrator L2/L3

As an L3 Server Administrator, you will be responsible for the design, deployment, administration, optimization, and troubleshooting of enterprise server environments (Windows and/or Linux). This senior-level role involves handling escalations, advanced problem-solving, automation, and collaboration with virtualization, storage, and networking teams to ensure high availability, performance, and security of server infrastructure.

Key Responsibilities:

• Provide L3 operational support for Windows and/or Linux server environments.
• Install, configure, and maintain Windows Server (2016/2019/2022) and Linux distributions (RHEL, CentOS, Ubuntu, SUSE).
• Manage Active Directory, DNS, DHCP, Group Policy, WSUS, and Certificate Services for Windows servers.
• Perform patching, OS upgrades, and vulnerability remediation.
• Troubleshoot escalated incidents including OS, hardware, cluster, and integration issues.
• Manage high availability and clustering solutions (Failover Clusters, Always-On, Pacemaker, Corosync).
• Administer file/print services, IIS/Apache, NFS/SMB, and other server roles.
• Integrate and support VMware, Hyper-V, and cloud-based servers (Azure, AWS, GCP).
• Implement and monitor backup/recovery and disaster recovery strategies.
• Automate server operations using PowerShell, Bash, or Python scripting.
• Perform capacity planning, performance tuning, and security hardening.
• Maintain runbooks, SOPs, and documentation in line with ITIL practices.
• Participate in on-call support rotation and provide RCA for major incidents.

Required Skills & Experience:

• Extensive experience in Windows/Linux server administration (6-10+ years).
• Strong expertise in Active Directory, DNS, DHCP, Group Policy, clustering, and patch management (Windows).
• Strong knowledge of Linux system services, package management, LVM, SELinux/AppArmor.
• Familiarity with VMware/Hyper-V virtualization and integration with storage/SAN.
• Experience with monitoring tools (SCOM, Nagios, Zabbix, SolarWinds).
• Strong troubleshooting and root cause analysis skills.
• Knowledge of IT security standards including hardening, patch compliance, and auditing.
• Scripting/automation experience using PowerShell, Bash, Python, or Ansible.
• Willingness to work in rotational shifts (shift cab allowances provided).

Preferred Qualifications:

• Microsoft Certified: Windows Server Hybrid Administrator Associate / MCSE.
• Red Hat Certified Engineer (RHCE) or equivalent Linux certifications.
• Experience with cloud-based server administration (Azure, AWS, GCP).
• Familiarity with DevOps tools such as Ansible, Puppet, Chef, Terraform.

Soft Skills:

• Strong analytical and problem-solving skills.
• Ability to handle critical escalations under pressure.
• Collaborative mindset and mentoring capability.
• Professional documentation and reporting skills.