Senior Systems Administrator

Overview

Senior System Administrator to design, manage, and scale mission-critical infrastructure across AWS and Azure, administering Linux platforms, container orchestration (EKS/AKS), Infrastructure as Code (Terraform), and automation (Ansible).

What you'll do

• Manage and optimize AWS services (EC2, VPC, IAM, RDS, S3, ALB/NLB, CloudWatch, EKS).
• Support Azure environments (VMs, VNets, NSG, Azure Monitor, AKS, Azure Load Balancer).
• Implement HA/DR strategies, cost optimization, tagging standards, and resource governance.
• Install, secure, patch, and troubleshoot RHEL/Oracle Linux systems.
• Manage system performance, storage (LVM), filesystems, and SELinux policies.
• Automate tasks using Bash/shell scripting and Ansible.
• Design and maintain L4/L7 load balancing solutions (ALB/NLB, Azure Load Balancer, Nginx, HAProxy, or F5).
• Configure SSL/TLS offloading, health checks, routing, and traffic policies.
• Operate and maintain Kubernetes clusters, including RBAC, networking, storage, and security controls.
• Perform cluster upgrades, manage deployments, scaling, and observability (Prometheus, Grafana, ELK).
• Build and manage Terraform-based deployments with modules, version control, and environment segregation.
• Implement policy-as-code and maintain secure state management.
• Develop and maintain Ansible playbooks/roles for provisioning, patching, and configuration management.
• Integrate Ansible workflows with CI/CD pipelines and secrets management.
• Enforce CIS/NIST/ISO hardening standards, patch/vulnerability management, IAM policies, and incident response.
• Define and track SLIs/SLOs, conduct RCAs and post-mortems, and maintain KB documentation.
• Work closely with development, network, and security teams to deliver resilient infrastructure.
• Mentor junior administrators and contribute to knowledge transfer and documentation.

What you'll need

• 7 - 12 years of Linux system administration with strong AWS & Azure experience (core services, networking, IAM, EKS).
• Working knowledge of Azure and AKS.
• Proficiency in Terraform and Ansible.
• Solid understanding of networking (TCP/IP, DNS, VPN, firewalls, SSL/TLS).
• Skilled in monitoring/observability (CloudWatch, Prometheus, Grafana, ELK/OpenSearch, Azure Monitor).
• Strong troubleshooting and performance tuning abilities; scripting in Bash/Python.

Nice to have

• Windows Server Administration (AD, DNS, Group Policy).
• VMware Administration (ESXi, vCenter, vSAN).
• Familiarity with Ivanti, GitOps (Argo CD/Flux), CI/CD (Azure DevOps, GitHub Actions).
• Experience with secrets management (HashiCorp Vault, AWS Secrets Manager).
• Professional certifications (AWS SysOps/Admin, CKA/CKAD, Azure Administrator, RHCSA/RHCE).

Details

• 24x7 shift with on-call responsibility.
• Worker type: Employee.