System Administrator and Architect - Global Server Infrastructure

About Us

A career at Hitachi Rail will help create a legacy. With operations in every corner of the world, our work goes to the
- edge of digital transformation and technology. From the
- cultural strength of our global organisation to the sustainable and innovative ways we work to bring people together, there's something for everyone to get stuck into. And that's where you come in.

Paço de Arcos, Portugal (Hybrid)

Purpose of the Role

To work on the architecture, operation and continuous development of our global server infrastructure, encompassing Windows, Linux, and UNIX platforms. The role focuses on building a resilient, secure and scalable infrastructure foundation supporting core business systems across all regions, both on-premises and in the cloud, in line with ITIL and information security best practices.

Key Responsibilities

• Design, deploy, and maintain multi-platform server environments across Windows, Linux, and UNIX.
• Manage and evolve the global Active Directory infrastructure, including secure authentication, policy enforcement, and domain architecture.
• Implement, operate and optimise virtualised platforms (primarily VMware), supporting high availability, resource planning and secure VM lifecycle management.
• Integration and administration of IBM Cloud Iaa
  S. Contribute to readiness and adoption of
  - native technologies on AWS or Azure (beneficial).
• Implement and maintain
  - grade backup, storage (SAN/NAS), monitoring systems to ensure uptime, compliance and rapid recovery.
• Drive the automation of system provisioning, patching, and configuration using tools such as Power
  Shell, Ansible, or Terraform.
• Ensure the security, compliance, and resilience of infrastructure through configuration hardening, vulnerability management, and access control.
• Collaborate globally with IT teams across regions to ensure standardization, knowledge sharing, and consistent infrastructure delivery.
• Lead infrastructure projects from planning to execution, including global rollouts, migrations, upgrades, and modernization efforts.
• Support audits and participate in IT security reviews, ensuring infrastructure aligns with relevant frameworks (e. g. ISO 27001, CIS, NIST).
• Document architecture, operational procedures, and support materials for internal teams.

Required Qualifications & Experience

• Degree in Computer Science, Information Technology, or equivalent hands‑on experience in complex infrastructure environments.
• Proven expertise in managing large‑scale server ecosystems across multiple platforms and locations.
• Experience supporting distributed infrastructure environments with 4, 000+ users and 2, 000+ virtual machines globally.
• Exposure to secure hybrid environments integrating on‑premises and cloud infrastructure.

Technical Competencies

• Administration of Windows, Linux and UNIX server platforms
• Active Directory (multi-domain/forest) and identity lifecycle management
• VMware v
  Sphere/ESXi (virtualisation, resource pools, HA)
• IBM Cloud (Iaa
  S provisioning, administration, security)
• Storage and backup systems (SAN/NAS, enterprise‑grade backup platforms)
• Core networking knowledge: TCP/IP, VLANs, DNS, DHCP, routing
• Monitoring and observability tools
• Automation/orchestration skills (Power
  Shell, Bash, Ansible)

• Experience with AWS and/or Azure, especially in hybrid or cloud‑native contexts
• Exposure to Dev
  Ops and Agile practices in IT operations
• Knowledge of containerisation (Docker, Kubernetes)
• Familiarity with infrastructure compliance, access control, and secure baselining (e. g. CIS, NIST)

At Hitachi Rail, there is a place for everyone. We welcome and value differences in background, age, gender, sexuality, family status, disability, race, nationality, ethnicity, religion, and world view. It is our commitment to create an inclusive environment - we are proud to be an equal opportunity employer.