Senior Cyber Security Engineer, Open Cosmos
More information about location
Satellite-based solutions
Be an early applicant
Satellite-based solutions
101-200 employees
Be an early applicant
More information about location
101-200 employees
Company mission
To put satellites and the data they gather at the service of solving the biggest global challenges.
Role
Who you are
- 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
What the job involves
- 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
- 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
- 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
Application process
- When applying, please submit your CV in English
Our take
Satellite data is critical for solving some of the world's most pressing matters, such as climate change and the loss of biodiversity. While precise, insight-collating data tools are available, the problem is that they lack interoperability between platforms. Combining data from different satellites is notoriously difficult.
Founded in 2015, Open Cosmos is a SpaceTech startup aiming to simplify access to space. The company designs, manufactures and operates satellites that are part of its "Open Constellation". Meanwhile, its platform, DataCosmos, makes access to satellite data easier for organisations and governments. It combines earth observation data from multiple sources to help mitigate environmental and sustainability challenges.
Partnerships with organisations such as Innovate UK, ESA and the UK Space Agency are supporting Open Cosmos as it expands operations, growing its team and ideas. 2025 saw the company begin manufacturing the first 6G satellite research lab, the 6GStarLab. In 2026, it announced ConnectedCosmos, which will offer secure communications for international businesses and government bodies without the need for mega constellations. The company, then, is positioning itself at the forefront of next-generation, space-based communication.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
27% employee growth in 12 months
Company
Funding (last 2 of 6 rounds)
Nov 2023
$6.8m
GRANT
Sep 2023
$50m
SERIES B
Total funding: $64.1m
Company benefits
- Open Cosmonaut Culture: Aim high go beyond is the OC mantra - our teams support each other pushing science to the limits, making the impossible, possible
- We're flexible!: Prefer to mostly WFH? That's fine! Hybrid? Great! Need to take 30 mins at 3pm to get the kids from school? Go ahead! We're more interested in your contributions than when and where you're working
- Our facilities: Working on our hardware? Look no further than our state of the art lab. Prefer to be in an office sometimes? All the time? Our office has everything you need for productive working, including drinks and snacks to keep you fuelled through the day
- Enhanced parental leave: Adding to your family is stressful enough without worrying about pay during those precious first few weeks and months. The UK team enjoy enhanced pay during parts of their statutory maternity, paternity or adoption leave
- Time off: Taking time off is important for our mental health - all our Open Cosmonauts have 25 days holiday in addition to national holidays
- Core Benefits: UK team members can enjoy Medicash, income protection and death in service benefits. Spain team members can enjoy access to a tax saving platform Cobee
- Career development: Having a successful team makes a successful company. We're at the forefront of technology so learning and building an enabling career for you is central to everyone's success
- Team days and social events: Getting to see our colleagues in person, especially when we work in different countries, is so important. We hold monthly team days, quarterly all company catch ups, summer parties and Christmas celebrations
Company HQ
Harwell, UK
Leadership
Rafel Jordá Siquier
(Founder & CEO)Previously, Rafel was an aerospace engineer at zero2infinity as well as a flight test center and flight line production engineer at Airbus Defence and Space. He was also the founder and coordinator of Upper Atmosphere Space Launcher.
Aleix Megias Homar
(Co-Founder & COO)Aleix has a professional history in engineering, having previously worked as a autonomous systems engineer for RAL Space, a flight dynamics engineer for Airbus Defence and Space as well as a systems engineer for the European Space Agency.
Salary benchmarks
We don't have enough data yet to provide salary benchmarks for this role.
Submit your salary to help other candidates with crowdsourced salary estimates.
Share this job
View 24 more jobs at Open Cosmos