Senior System Administrator - L3

This is an L3-level, individual contributor onsite role at a Government sector client in Manesar, Haryana. Immediate or max 1-month joiners preferred. Deep hands-on Systems troubleshooting (Infra + Cloud Admin) Roles and Responsibilities On-Premises Administration (Windows s Linux): Deliver L3 troubleshooting and resolution for Windows Server (2016–2022) and Linux (RHEL, Ubuntu, CentOS) Administer Active Directory, DNS, DHCP, Group Policies , and network file services Deploy and optimize virtual machines using VMware vSphere and Microsoft Hyper-V Manage disk volumes, backup schedules , and patch baselines across systems. Coordinate escalations with OEMs and vendors Cloud Infrastructure (AWS/Azure): Configure and manage IaaS components (VMs, Load Balancers, VPC, Storage, IAM, etc.) Configure and maintain cloud infrastructure using AWS EC2, Azure VMs, IAM, S3/Blob, Route Tables, Load Balancers. Troubleshoot cloud outages , VPC connectivity, access control issues, and performance bottlenecks Support hybrid cloud adoption and application migrations Assist with cloud integration, lift-and-shift migrations, and cost optimization practices. Monitoring s Automation: Implement monitoring via Nagios, Zabbix, AWS CloudWatch, Azure Monitor Create PowerShell and Bash scripts for automation, health checks, and maintenance Use PowerShell scripts, Bash , or automation tools (e.g., Ansible) to streamline administrative tasks. Own alert handling, event correlation , and SOPs for infrastructure stability Technical Escalation s RCA: Take ownership of critical escalations , conduct RCA, and collaborate across cross-functional teams (Network, App, Cloud). Own end-to-end incident resolution and root cause analysis (RCA) Proactively address recurring issues and participate in problem management Collaborate with IT, cloud teams, and application owners for in-depth troubleshooting Candidate Profile Experience: 10–12 years in enterprise IT infrastructure Role Type: Individual contributor, Hands-On Technical Specialist Strong communication skills : Able to document, articulate, and coordinate effectively with technical and non-technical stakeholders. Scope: L3 escalation support Preferred Qualifications B.E./B.Tech/MCA or equivalent in Computer Science / IT Certifications (Preferred): Microsoft Certified: Windows Server / Azure Administrator AWS Certified SysOps Administrator RHCE / RHEL Certified Admin