Business Unit:
Cubic Transportation Systems
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). 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.
Cloud Infrastructure (AWS & Azure)
Manage and optimize AWS services (EC2, VPC, IAM, RDS, S3, ALB/NLB, CloudWatch, EKS).
Linux Administration
Install, secure, patch, and troubleshoot RHEL/Oracle Linux systems.
Manage system performance, storage (LVM), filesystems, and SELinux policies.
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 playbooks/roles for provisioning, patching, and configuration management.
Security, Compliance & SRE Operations
Enforce CIS/NIST/ISO hardening standards, patch/vulnerability management, IAM policies, and incident response.
Work closely with development, network, and security teams to deliver resilient infrastructure.
Ability to prioritize and perform under pressure with on-call responsibilities
~24*7 shift along with Oncall responsibility

Comply with Cubic's Quality Management System
Comply with Cubic Occupational Health, Safety and Workplace policies and procedures
Comply with security in accordance with established policies and procedures of the organisations
7 - 12 years of Linux system administration with strong AWS & Azure experience (core services, networking, IAM, EKS).

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.
Windows Server Administration (AD, DNS, Group Policy).
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).

📌 Senior Systems Administrator / DevOps (Secunderabad)
🏢 Cubic Transportation Systems
📍 Secunderabad