Senior Infrastructure Engineer

Right now, within government departments and secure facilities around the world, people are making decisions that protect the UK's interests. They're sharing sensitive intelligence, coordinating responses to emerging threats, and collaborating on work that is imperative to UK interests.

They can do this because of Rosa.

Our work is the foundation for what comes next. The government has committed to a programme that will upgrade Rosa to a modern cloud-first platform. But transformation doesn't happen in a vacuum - it happens because the current service is trusted, reliable, and run by people who understand what government actually needs.

We need your help to deliver Rosa brilliantly today. This is how we earn the right to deliver the next generation capability for working at SECRET. Every improvement we make, every incident we resolve, every user we support builds the credibility and capability that makes transformation possible.

Its a very exciting time for the Rosa Service Organisation (RSO). As a unique organisation within Government, we continue to grow and develop. Our people are the single most important element to our success and creating a development offer that encourages and supports career development and progression is critical.

This is a fantastic opportunity to be a part of a growing team in a modern and flexible working environment. This is a varied and exciting role for an experienced, intelligent and enthusiastic individual looking to drive forward the design and delivery of secure capabilities that will transform the Rosa Service.

In this role you will be responsible for:

• Design, implement, and maintain enterprise-grade infrastructure solutions across on-premises and cloud environments.
• Manage and support core Windows Server infrastructure, including Active Directory (AD), ADFS, DNS, DHCP, and Group Policy.
• Oversee backup and recovery strategies, ensuring data integrity and business continuity.
• Monitor system performance, troubleshoot issues, and implement improvements to optimize reliability and scalability.
• Collaborate with cross-functional teams to support application deployments and infrastructure automation.
• Maintain documentation of systems, configurations, and procedures using tools like Confluence.
• Ensure compliance with security policies and industry best practices.
• Mentor junior engineers and contribute to the continuous improvement of infrastructure standards and processes.

We are looking for someone with:

Essential

• Strong experience with Windows Server administration (2016/2019/2025).
• Deep knowledge of Active Directory, ADFS, and Group Policy.
• Proficiency in backup and recovery solutions
• Solid understanding of networking fundamentals (TCP/IP, DNS, DHCP).
• Experience with PowerShell scripting for automation and system management.
• Familiarity with monitoring tools .
• Excellent problem-solving skills and ability to work independently or as part of a team.

Desirable

• Experience with Public Key Infrastructure (PKI) and certificate management.
• Knowledge of VMware vSphere and virtual infrastructure management.
• Exposure to cloud platforms, particularly AWS .
• Understanding of Agile methodologies and experience working in Agile teams.
• Familiarity with Jira and Confluence for task tracking and documentation.