Senior Cyber Security Engineer

Our COO Teams are the engine that powers Open Cosmos' operations. This division brings together mission management, supply chain, and quality & product assurance to make sure every mission is delivered smoothly, reliably, and to the highest standards. They turn plans into action, keeping us efficient and mission-ready at all times.

We are looking for a Senior Cyber Security Engineer, who'll play a critical role in protecting the systems that power our satellites, ground operations, and global infrastructure.

What will you be doing?

This is a hands-on role focused on strengthening our security posture end-to-end. You'll work across cloud, corporate, and mission-critical environments, embedding security into how we build, operate, and scale. It's not about monitoring from the sidelines - it's about actively improving, automating, and staying ahead of an evolving threat landscape.

You'll be:

• Strengthening the security posture of our cloud environments (AWS, Azure, GCP) through continuous improvement and optimisation
• Implementing and evolving Zero Trust principles across identity, access, and system design
• Securing satellite ground segment and operational infrastructure, ensuring clear separation from corporate environments
• Continuously hardening systems across endpoints, networks, and cloud platforms
• Designing and improving detection capabilities across SIEM and XDR tools, moving beyond standard alerts
• Developing detection logic to identify anomalous behaviour across infrastructure, applications, and telemetry
• Leading technical responses to security incidents, including investigation, containment, and root cause analysis
• Building and refining incident response playbooks to ensure consistent and effective handling of threats
• Managing vulnerabilities end-to-end, from identification through to validated remediation
• Embedding security into development workflows by integrating tooling into CI/CD pipelines
• Partnering with engineering teams to ensure systems and applications are secure by design
• Automating security processes to improve response times and reduce manual effort
• Continuously improving security tooling, processes, and controls across the organisation

• Strong understanding of cyber security across infrastructure, cloud environments, and applications
• Deep knowledge of public cloud security (GCP, AWS, Azure) and SaaS platforms such as Microsoft 365
• Familiarity with SIEM/XDR platforms and vulnerability management tools
• Solid understanding of identity and access management, Zero Trust architectures, and secure network design
• Ability to write scripts or code to automate security tasks (e.g. Python, Bash, PowerShell)
• Strong knowledge of Linux and Windows systems, including system hardening approaches
• Understanding of secure software development practices and how to integrate security into CI/CD pipelines
• A proactive mindset, taking ownership of security challenges and driving improvements
• Curiosity to explore new threats, tools, and approaches in a constantly evolving landscape
• Ability to collaborate effectively across technical teams and embed security into everyday work
• A pragmatic approach, balancing strong security with operational needs
• Clear communication of technical risks and solutions to a range of stakeholders

At Open Cosmos we are solving the world's biggest challenges from space, providing businesses, governments and researchers access to more readily available information than ever before - ready for the challenge? Then read on…, When applying, please submit your CV in English Why Open Cosmos? * Work at the cutting edge of space technology with customers around the globe. * A mission-driven company making space accessible to help solve real-world challenges. * A diverse, ambitious, and supportive team.