AI Security Institute

Research Scientist, Open Source Technical Safeguards London, UK About the AI Security Institute The AI Security Institute is the world's largest and best-funded team dedicated to understanding advanced AI risks and translating that knowledge into action. We're in the heart of the UK government with direct lines to No. 10 (the Prime Minister's office), and we work with frontier developers and governments globally. We're here because governments are critical for advanced AI going well, and UK AISI is uniquely positioned to mobilise them. With our resources, unique agility and international influence, this is the best place to shape both AI development and government action. Societal Resilience Societal Resilience is a multidisciplinary team that studies how advanced AI models can impact people and society. We research the prevalence and severity of high impact societal risks caused by frontier AI deployment, and develop mitigations to address these risks. Core research topics include the use of AI for assisting with criminal activities, preventing critical overreliance on insufficiently robust systems, undermining trust in information, jeopardising psychological wellbeing, or for malicious social engineering. We are interested in both immediate and medium term risks. Why this team matters One emerging risk area we are concerned with is the use of open weight models to drive risks like child sexual abuse material (CSAM) and non consensual intimate imagery (NCII) generation. AISI has previously published research on methods for making open weight models more robust against malicious tampering. In this role, you'll join a strongly collaborative technical research team to help design and develop technical safeguards for open weight models that will reduce the risks of CSAM, NCII, and other risks. We do not expect this role to handle this kind of content directly. About the role This is a research scientist position focused on developing technical safeguards against tampering with open weight models. The role will focus on mitigating AI generated CSAM and NCII by targeting the real world supply chain driving harm: open weight models, adaptation artifacts (LoRAs, guides), and downstream distribution infrastructure (hosting platforms, app stores, operating systems). Our approach prioritises downstream mitigations and actors beyond frontier model developers. This role will build technical tools, protocols, and evidence that platforms and OS/app ecosystems can adopt. This work belongs inside UK government because effective mitigation requires cross agency coordination (Home Office, DSIT, Ofcom), engagement with regulated platforms under the Online Safety Act, and credible evidence to inform policy trade offs across innovation, competition, and child protection. This role will synthesize threat intelligence on how AI generated CSAM and NCII are developed, create scalable screening methodologies that platforms can realistically run, and publish best practice protocols with NGOs to raise the floor across the ecosystem. You'll work closely with engineers and domain experts across AISI, as well as external research collaborators at Home Office, Internet Watch Foundation, and Ofcom. Researchers on this team have substantial freedom to shape independent research agendas, lead collaborations, and initiate projects that push the frontier of what evaluations can reveal. Example Projects Publish a Problem Book framing the technical challenges and research directions for preventing CSAM/NCII misuse across model and hosting layers. Develop threat models for how AI generated CSAM and NCII are created and shared. Design and pilot scalable, automated screening methodologies platforms can run pre publication on uploads (topic general prototypes that avoid exposure to illegal content). Develop approaches for identifying and tracking known or novel CSAM LoRAs to enable platform blocking at upload. Co develop best practice protocols with NGOs (e.g., Thorn/IWF) for hosting, app store, and OS enforcement. This is an individual contributor role with no line management responsibilities. You will report into a senior Research Scientist overseeing our team's misuse workstream. Impact Your work will raise safety standards across hosting and distribution layers, reduce the availability of CSAM/NCII generating artifacts (e.g., LoRAs) on major platforms, inform industry protocols and possibly standards, and provide actionable evidence for government decisions. Crucially, we do not expect this role to handle NCII or CSAM material. Role Requirements We're flexible on the exact profile and expect successful candidates will meet many (but not necessarily all) of the criteria below. Depending on experience, we will consider candidates at either the RS or Senior RS level. At least 3+ years of relevant experience in applied ML, trust & safety tooling, content moderation, security engineering, or adjacent technical fields; we also welcome strong earlier career applicants (2-3 years) with demonstrated impact in open source technical work. Deep familiarity with open weight image/video models (diffusion, LoRA), model hosting ecosystems (e.g., Hugging Face, GitHub), and the limitations of pre deployment safeguards. Strong methodological rigor and creativity; able to design automated, scalable evaluations and detection methods that generalise and avoid reliance on illegal content. Strong Python and ML stack (PyTorch/JAX), data engineering, and systems skills; experience building pipelines and tooling that run at platform scale. Knowledge of fingerprinting and detection approaches (e.g., perceptual hashing, embedding based similarity, behavioural signatures), and their privacy and robustness trade offs. Excellent writing and communication for technical and policy audiences; ability to translate evidence into practical governance guidance. High agency, ethical judgment, and safe working practices for sensitive topics. Commit to work from our London office in Whitehall for parts of the week, with flexibility for remote work. We're looking for full time commitment but are open to part time arrangements. Preferred Experience collaborating with hosting platforms, app stores, OS vendors, or regulators (e.g., Ofcom) on safety by design initiatives. Familiarity with Online Safety Act requirements and platform trust & safety operations; prior work with NGOs such as IWF, Thorn, or STOPNCII.org. Expertise in diffusion models and adaptation techniques (LoRA), model evaluation, and secure tooling for sensitive domains. Experience with privacy preserving computation, metadata poor detection, and standardization efforts (RFCs, protocols). Open source contributions (tools, libraries) and evidence of leading cross sector technical projects. Example backgrounds Senior trust & safety engineer who built automated content integrity pipelines for a large platform; strong OS/Strack record; experience with model hosting ecosystems. Applied ML researcher with a PhD/postdoc in computer vision or ML safety; hands on with diffusion/LoRA; led evaluations and published tooling used by industry. Security/data engineer with 3+ years building scalable detection systems; experience in fingerprinting, hashing, and privacy preserving methods; collaborated with regulators/NGOs. 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 If you're talented and driven, you'll own important problems early. 5 development days per year, an annual L&D budget, and travel support 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 with opportunities for occasional remote work abroad At least 25 days' annual leave, 8 public holidays, and extra team wide breaks Generous paid parental leave (36 weeks of UK statutory leave shared between parents + 3 extra paid weeks + option for additional unpaid time) Plus: 27% government funded pension contribution on top of salary, work from home equipment and dental insurance Annual salary is benchmarked to role scope and relevant experience. Most offers land between £65,000 and £145,000 (base plus technical allowance), with 27% employer pension and other benefits on top (details on the "what we offer" section on our careers page). 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. Salary ranges Level 3 - Total Package £65,000 - £75,000 inclusive of a base salary £35,720 plus additional technical talent allowance of between £29,280 - £39,280 . click apply for full job details

A leading AI research organization in London is seeking a Research Scientist with expertise in developing safeguards for open-source models. The successful candidate will focus on mitigating risks related to AI-generated harmful content, engaging with various stakeholders across government and industry. Ideal candidates will possess strong technical skills in machine learning, particularly with open-weight models. This position offers competitive compensation, unique opportunities for influence in AI governance, and the flexibility of hybrid working arrangements.