A leading AI security organization in the UK seeks a Cybersecurity Engineer to build evaluation environments assessing AI systems' cyber capabilities. You'll design challenges and develop metrics for performance in real-world tasks. Collaborating with engineers and researchers, your work will influence national security decisions and contribute to improving AI safety standards. Ideal candidates have strong Python skills and experience in cybersecurity red-teaming practices. This full-time role requires on-site work in Greater London with some remote flexibility.