Senior Systems Administrator

Cubic Transportation Systems; Hyderabad; On-site; INR 1,800,000 - 3,000,000; Full time

Job summary

Cubic Transportation Systems is seeking an experienced Senior System Administrator to design, manage, and scale mission-critical infrastructure across AWS and Azure. The role focuses on Linux administration, container orchestration (EKS/AKS), and automation with Terraform and Ansible.

The ideal candidate will ensure secure, reliable, and high-performing systems through proactive monitoring, automation, and continuous improvement, with on-call responsibilities and a 24x7 shift culture.

Qualifications

• 7–12 years of Linux system administration with strong AWS & Azure experience.
• Proficiency in Terraform and Ansible.
• Solid understanding of networking (TCP/IP, DNS, VPN, firewalls, SSL/TLS).
• Experience with monitoring/observability (CloudWatch, Prometheus, Grafana, ELK/OpenSearch).
• Scripting in Bash/Python; strong troubleshooting and performance tuning.

Responsibilities

• Design, manage, and scale mission-critical infrastructure across AWS and Azure.
• Administer Linux platforms and container orchestration (EKS/AKS).
• Automate tasks using Terraform and Ansible; implement HA/DR strategies.
• Monitor, secure, and optimize cloud resources with observability tools.
• Support on-call duties and collaborate with development, network, and security teams.

Skills

Linux admin

AWS

Azure

EKS/AKS

Terraform

Ansible

Kubernetes

CI/CD

Monitoring

Security

Tools

Prometheus

Grafana

ELK/OpenSearch

CI/CD tools

GitOps

Job description

Business Unit:Cubic Transportation SystemsCompany Details:When you join Cubic, you become part of a company that creates and delivers technology solutions in transportation to make people’s lives easier by simplifying their daily journeys, and defense capabilities to help promote mission success and safety for those who serve their nation. Led by our talented teams around the world, Cubic is committed to solving global issues through innovation and service to our customers and partners.We have a top-tier portfolio of businesses, including Cubic Transportation Systems (CTS) and Cubic Defense (CD). Explore more on Cubic.com.Job Details:Job Summary:Seeking an experienced Senior System Administrator to design, manage, and scale mission-critical infrastructure across AWS and Azure. This role involves administering Linux platforms, container orchestration (EKS/AKS), Infrastructure as Code (Terraform), and automation (Ansible). The ideal candidate will ensure secure, reliable, and high-performing systems through proactive monitoring, automation, and continuous improvement.Essential Job Duties and Responsibilities:Cloud Infrastructure (AWS & Azure)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.Linux AdministrationInstall, 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.Load BalancingDesign 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.Containers & Orchestration (EKS/AKS)Operate and maintain Kubernetes clusters, including RBAC, networking, storage, and security controls.Perform cluster upgrades, manage deployments, scaling, and observability (Prometheus, Grafana, ELK).Infrastructure as Code (Terraform)Build and manage Terraform-based deployments with modules, version control, and environment segregation.Implement policy-as-code and maintain secure state management.Automation (Ansible)Develop and maintain playbooks/roles for provisioning, patching, and configuration management.Integrate Ansible workflows with CI/CD pipelines and secrets management.Security, Compliance & SRE OperationsEnforce 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.Collaboration & MentorshipWork closely with development, network, and security teams to deliver resilient infrastructure.Mentor junior administrators and contribute to knowledge transfer and documentation.Core CompetenciesOwnership and accountability for production systems.Clear documentation and knowledge sharing.Strong analytical and communication skills.Security-first mindset and attention to detail.Ability to prioritize and perform under pressure with on-call responsibilities24*7 shift along with Oncall responsibilityGeneral Duties and Responsibilities:Comply with Cubic’s Quality Management SystemComply with Cubic Occupational Health, Safety and Environment policies and proceduresComply with security in accordance with established policies and procedures of the organisationsComply with Cubic Human Resources ProceduresOther duties as requestedMinimum Job Requirements: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 HaveWindows 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).Worker Type:EmployeeWe are committed to creating an inclusive workplace and welcome applications from people of all backgrounds. We do not discriminate based on any protected characteristic under applicable law.