Security Operations DevOps Engineer in Cowbridge

Location: Crown Way, Cardiff, UK; 1 Sibbald Walk, Edinburgh EH8 8FT, UK

Salary: 62,881 - 76,136 per year

Employment: Flexible

Category: Security

Posted: 2026-09-12

Valid to: 2026-09-29

Employer: Companies House

Job summary

Join Companies House as a Security Operations DevSecOps Engineer and help shape the future of our Security Operations capability. This is a hands-on engineering role where you'll design, build and automate the cloud infrastructure, tooling and platforms that support our security monitoring and response services. Working across AWS, Azure and Microsoft Sentinel, you'll develop secure, scalable and resilient solutions using Terraform, GitHub, Infrastructure as Code and CI/CD practices.

You'll play a key role in improving automation, integrating security technologies, and enhancing the reliability of our security platforms, enabling the Security Operations team to respond to threats more effectively and independently. This is an exciting opportunity to take ownership of significant technical challenges while helping to build a modern, engineering-led Security Operations function.

About the Team

The Security Operations team plays a critical role in protecting Companies House systems, services and data from cyber threats. We are responsible for monitoring, detecting and responding to security incidents, while continuously improving our security capabilities across a complex multi-cloud environment. As part of a growing and evolving function, we are building greater in-house engineering capability to enhance our security tooling, automation and monitoring platforms. Working closely with colleagues across Security, Platform Engineering and Digital teams, we develop innovative solutions that strengthen our security posture and support the delivery of secure public services.

Job description

To be eligible for this role you also need to meet our Nationality requirements which are outlined below and also successful candidates must meet the security requirements for Security Clearance (SC) before they can be appointed. To gain (SC) clearance you will need to have been a UK resident for a minimum of 3 years out of the last 5 years.

As a Security Operations DevSecOps Engineer, you will:

• Design, build and maintain security infrastructure across AWS and Azure environments.
• Develop and manage Infrastructure as Code solutions using Terraform.
• Build and maintain secure CI/CD pipelines and deployment processes.
• Engineer and support Microsoft Sentinel, including data connectors, integrations and automation.
• Develop integrations and data pipelines that collect, process and route security telemetry.
• Create automated solutions to improve monitoring, investigation and response activities.
• Monitor, maintain and enhance the reliability, resilience and security of security platforms and services.
• Work closely with Security Operations analysts and engineering teams to develop scalable detection and monitoring solutions.
• Take technical ownership of security engineering initiatives and drive continuous improvement across the Security Operations capability.

Please note- Companies House cannot offer Visa sponsorship to candidates through this campaign.

Where will you be working?

You will be aligned to either the Cardiff or Edinburgh office, where you will be expected to attend at least once a week. We are currently using a hybrid approach to the way we work which provides opportunities for you to be adaptable in the way you work so that you can achieve a healthy balance between your work and home life.

What we’re looking for

The successful candidate will be an experienced cloud and security engineer with strong hands-on technical skills and the ability to design, build, automate and maintain security infrastructure across a multi-cloud environment.

Experience

• Strong hands-on experience engineering and supporting Amazon Web Services environments, including cloud infrastructure, security services, logging and integrations.
• Strong practical experience using Terraform and Infrastructure as Code to build, configure and manage cloud infrastructure.
• Strong practical experience using GitHub for source control, versioning, code review and engineering workflows.
• Experience developing and maintaining continuous integration and deployment pipelines using Concourse or comparable deployment technologies.
• Experience working with Microsoft Azure and Microsoft Sentinel, including security monitoring, data ingestion, integrations, configuration and automation.
• Experience developing integrations and automation between cloud platforms and security technologies using scripting, application programming interfaces and automated workflows.
• Experience supporting operational cloud platforms and troubleshooting complex infrastructure, deployment, integration and data pipeline issues.

Behaviours

We'll assess you against these behaviours during the selection process:

• Working Together
• Delivering at Pace

Technical skills

We'll assess you against these technical skills during the selection process:

• Strong knowledge of Terraform and Infrastructure as Code, including state management, reusable infrastructure, testing and automated deployment practices.
• Strong knowledge of GitHub and modern source control and deployment practices.
• Strong understanding of cloud and DevSecOps engineering principles, including secrets management, access control, testing, change management, deployment resilience, rollback and recovery.
• Strong knowledge of Amazon Web Services architecture and security, including identity and access management, logging, monitoring and security services.
• Good working knowledge of Concourse or equivalent continuous integration and deployment technologies, including secure and resilient pipeline design.
• Good knowledge of Microsoft Azure and Microsoft Sentinel, including security monitoring architecture, data connectors, integrations and automation.
• Practical scripting and automation skills using Python, PowerShell, Bash or equivalent technologies.
• Understanding of security telemetry and the engineering required to reliably collect, process and route security data across cloud and security platforms.

Benefits

Alongside your salary of 62,881, Companies House contributes 18,216 towards you being a member of the Civil Service Defined Benefit Pension scheme. We believe that our success is driven by the well-being and satisfaction of our team members at all levels of the organisation. At Companies House we’re committed to providing a comprehensive benefits package that goes beyond the ordinary, ensuring your career journey with us is not only fulfilling, but also rewarding.

• Flexible working arrangements, with no core hours and working patterns available between 6am and 8pm.
• Hybrid working opportunities, helping you balance office collaboration with home working.
• 30 days annual leave, plus bank holidays, increasing with service.
• Civil Service Pension Scheme, with an average employer contribution of 28%.
• A strong commitment to learning, development and career progression.
• Access to wellbeing support, resources and initiatives that promote positive physical and mental health.
• A collaborative and inclusive working environment where colleagues are encouraged to bring their whole selves to work.

We Celebrate Diversity

As an equal opportunity employer, we celebrate diversity, being committed to ensuring we’re representative of the citizens we serve and creating an inclusive environment. Everyone in Companies House brings something different, and so will you.