About the Team 

The Cyber and Autonomous Systems Team (CAST) is looking to research and map the evolving frontier of AI capabilities and propensities to inform critical security decisions that reduce loss-of-control risks from frontier AI. We focus on preventing harms from high-impact cybersecurity capabilities and highly capable autonomous AI systems.   

Our team is a blend of high-velocity generalists and technical staff, from organisations such as Meta, Amazon, Palantir, DSTL and Jane Street. Our recent work has included building model evaluations suites – such as Replibench - the world’s most comprehensive evaluation suite for understanding the risk of a model autonomously replicating itself over the internet. We also regularly test the cyber and other relevant capabilities of frontier models, before they are released, to understand their risks. 

As AI systems become more advanced, the potential for misuse of their cyber capabilities may pose a threat to the security of organisations and individuals. Cyber capabilities also form common bottlenecks in scenarios across other AI risk areas such as harmful outcomes from biological and chemical capabilities and from autonomous systems. One approach to better understanding these risks is by conducting robust empirical tests of AI systems so we can better understand how capable they currently are when it comes to performing cyber security tasks. In this role, you'll join a strongly collaborative team to help create new kinds of capability and safety evaluations to evaluate frontier AI systems as they are released. 

About the Role

This is a cybersecurity engineer position focused on building environments and challenges to benchmark the cyber capabilities of AI systems. You'll design cyber ranges, CTF-style tasks, and evaluation infrastructure that allows us to rigorously measure how well frontier AI models perform on real-world cybersecurity tasks. 

This work belongs inside UK government because understanding AI cyber capabilities is critical to national security, and robust empirical testing requires coordination across government, industry, and international partners to inform policy decisions on AI safety. 

You'll work closely with research engineers, infrastructure engineers, and machine learning researchers across AISI. As a small, fast-moving team building first-of-its-kind evaluation infrastructure, you'll be able to influence research directions, own whole pieces of work, and bring your ideas to the table. 

Core Responsibilities 

• Evaluation Design & Development (60%) 
  • Design cyber ranges and CTF-style challenges for automatically grading AI system performance on cybersecurity tasks
  • Build agentic scaffolding to evaluate frontier models, equipping them with tools such as network packet capture utilities, penetration testing frameworks, and reverse engineering/disassembly tools 
  • Design metrics and interpret results of cyber capability evaluations 
• Infrastructure engineering (30%) 
  • Work alongside other engineers to ensure evaluation environments are robust and scalable 
• Research & Communication (10%) 
  • Write reports, research papers and blog posts to share findings with stakeholders 
  • Keep up-to-date with related research taking place in other organisations 
  • Contribute to AISI's broader understanding of AI cyber risks   

Example Projects 

• Onboard and integrate new cyber ranges into our evaluation pipeline 
• Conduct agent research to improve the cyber capabilities of our agents 
• Improve grading and scoring methodologies for automated evaluation tasks 
• Integrate defensive telemetry and simulated users into ranges to increase their realism 
• Collaborate with government partners on joint research publications 

Impact 

Your work will directly shape the UK government's understanding of AI cyber capabilities, inform safety standards for frontier AI systems, and contribute to the global effort to develop rigorous evaluation methodologies. The evaluations you build will help determine how advanced AI systems are assessed before deployment

 

What we are looking for

We're flexible on the exact profile and expect successful candidates will meet many (but not necessarily all) of the criteria below. 

Essential 

• Strong Python skills with experience writing scripts for automation or security tooling 
• Proven experience in at least one of the following areas of cybersecurity red-teaming: 
  • Penetration testing 
  • Cyber range design 
  • Competing in or designing CTFs 
  • Developing automated security testing tools 
  • Bug bounties, vulnerability research, or exploit discovery and patching 
• Strong interest in helping improve the safety of AI systems 

Preferred 

• Familiarity with virtualisation technologies such as Proxmox VE and infrastructure-as-code approaches to enable reproducible test environments to be rapidly spun up for testing 
• Ability to communicate the outcomes of cybersecurity research to a range of technical and non-technical audiences 
• Familiarity with cybersecurity tools such as network packet capture utilities, penetration testing frameworks, and reverse engineering/disassembly tools 
• Active in the cybersecurity community with a track record of keeping up to date with new research 
• Previous experience building or measuring the impact of automation tools on cyber red-teaming workflows 

Example backgrounds 

• Penetration tester with 1+ years experience; has designed CTF challenges or cyber ranges; strong Python skills; interested in AI safety 
• Content engineer at a cybersecurity training platform; experienced in building vulnerable machines, CTF challenges, and automated deployment infrastructure 
• Security researcher with experience in vulnerability research or bug bounties; familiar with penetration testing frameworks and reverse engineering tools; has communicated findings to mixed audiences 

Core requirements   

• This is a full time role.   
• You should be able to join us for at least 24 months.   
• You should be able work from our office in London (Whitehall) for several days each week, but we provide flexibility for remote work. 
• We would like candidates to be able to start in Q2 2026  

 

What We Offer 

Impact you couldn't have anywhere else 

• Incredibly talented, mission-driven and supportive colleagues. 
• Direct influence on how frontier AI is governed and deployed globally. 
• Work with the Prime Minister’s AI Advisor and leading AI companies. 
• Opportunity to shape the first & best-resourced public-interest research team focused on AI security. 

Resources & access 

• Pre-release access to multiple frontier models and ample compute. 
• Extensive operational support so you can focus on research and ship quickly. 
• Work with experts across national security, policy, AI research and adjacent sciences. 

Growth & autonomy 

• If you’re talented and driven, you’ll own important problems early. 
• 5 days off learning and development, annual stipends for learning and development and funding for conferences and external collaborations. 
• Freedom to pursue research bets without product pressure. 
• Opportunities to publish and collaborate externally. 

Life & family* 

• Modern central London office (cafes, food court, gym) or option to work in similar government offices in Birmingham, Cardiff, Darlington, Edinburgh, Salford or Bristol. 
• Hybrid working, flexibility for occasional remote work abroad and stipends for work-from-home equipment. 
• At least 25 days’ annual leave, 8 public holidays, extra team-wide breaks and 3 days off for volunteering. 
• Generous paid parental leave (36 weeks of UK statutory leave shared between parents + 3 extra paid weeks + option for additional unpaid time). 
• On top of your salary, we contribute 28.97% of your base salary to your pension. 
• Discounts and benefits for cycling to work, donations and retail/gyms. 

*These benefits apply to direct employees. Benefits may differ for individuals joining through other employment arrangements such as secondments. 

 

Salary

Annual salary is benchmarked to role scope and relevant experience. Most offers land between £65,000 and £145,000 made up of a base salary plus a technical allowance (take-home salary = base + technical allowance). An additional 28.97% employer pension contribution is paid on the base salary. 

This role sits outside of the DDaT pay framework given the scope of this role requires in depth technical expertise in frontier AI safety, robustness and advanced AI architectures. 

The full range of salaries are available below: 

• Level 3: £65,000–£75,000 (Base £35,720 + Technical Allowance £29,280–£39,280) 

• Level 4: £85,000–£95,000 (Base £42,495 + Technical Allowance £42,505–£52,505) 

• Level 5: £105,000–£115,000 (Base £55