Research Engineer – Human Influence

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. The deadline for applying to this role is Sunday 11th October 2026, end of day, anywhere on Earth. Team

Description The Human Influence (HI) team focuses on the ways in which AI can influence human beliefs, decisions, and behaviour. A substantial class of AI risk operates through people. AI systems can persuade people to change their beliefs and to take action; can build trusting relationships with people in order to exploit them; can extract private information from them; and can hold delegated ownership of high-stakes decisions.

Our work is highly interdisciplinary, drawing on methods from computational social science, AI safety and security, cognitive and behavioural science, machine learning, and data science. Typical projects include running rigorous human-AI interaction studies and randomised controlled trials, building evaluations and benchmarks that track AI capabilities across model releases, eliciting model capabilities through fine-tuning and self-play, and developing datasets to monitor real-world risk exposure and severity.

Role Description We are looking for a Research Engineer to join the Human Influence team . Successful candidates will be strong researchers and engineers with a track record of carrying out scalable work in LLM post-training and fine-tuning , especially with Reinforcement Learning ; or w ith comparable expertise in engineering and validating large-scale evaluation pipelines.

Projects the Research Engineer might deliver include: Designing and building a Reinforcement Learning environment a imed at mitigating a model’s ability to e.g. deceive a user i n a one-to-one conversation or within multi-agent threads.

Leveraging state-of-the-art interpretability methods to iden tify why models exhi bit con cerning behaviour , and designing mitigations that c an be applied to models irrespective of training regime.

Building the scalable system architecture underpinning the repeatable delivery and analysis of model evaluations and benchmarks.

Delivering ambitious, engineering-heavy research projects on Human Influence topics, for instance by leveraging post-training techniques on a large compute cluster.

Who we're looking for

This is a multidisciplinary team , and successful candidates come from a wide range of backgrounds.

Essential General: Proven experience de ploy ing a benchmark, evaluation, or product to users, e.g. an evaluations pipeline in an app, an open-source contribution, or similar large-scale contributions to research.

Clear understanding of the current AI safety literature, and an interest in topics relevant to Human Influence .

Clear and consistent communication .

Clear understanding of fundamental Machine Learning c o n c epts.

Research and engineering:

Experience fine-tuning or post-training LLMs using standard methods , using common libraries like PyTorch , Keras , JAX, or custom code.

Comfortable working with RL environments and using RL or other reward-based methods to post-train or finetune an ML model, ideally an LLM . Writing scalable and maintainable production code in (at least) Python.

Comfortabl e with serving, scaling, and containerising ML code , e.g. using Docker, Kubernetes, Ray, FastAPI , SLURM, e specially on large compute clusters.

Desirable Good understanding of model internals, e.g. for mechanistic interpretability research, or analysing model activations and weights

Experience shipping an AI safety pipeline to production (e.g. evaluations, monitoring, serving custom models), going beyond research prototypes Experience using data to answer complex research questions, e.g. by scoping, training, and validating a classifier or finetuned LLM

Experience with frontend and node.js deployments

We will review applications as they come in, so would encourage you to apply early.

If you are interested in this role and have engineering leadership experience, you may also want to consider our open Engineering Lead position.

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

and 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, or where applicable, option to work in similar government offices in Birmingham, Cardiff, Darlington, Edinburgh, Salford or