Radioactive Materials & Health Physics Expert (AI Safety)

AfterQuery is looking for radioactive materials and health physics experts to help make AI models safer in their domain. You'll author and review evaluation tasks that test whether a model can tell a safe request from an unsafe one, and write the expert analysis behind each call: what makes a prompt acceptable, where it crosses a line, and why. Requirements

Master's degree or higher in health physics, radiochemistry, nuclear engineering, or a closely related discipline Citizenship of a Five Eyes country (United States, United Kingdom, Canada, Australia, or New Zealand) Physically located in one of those countries while doing the work Able to explain the technical reasoning behind a safety judgment clearly and precisely

Pay: $150/hr equivalent, paid at $85 per approved task. Remote, flexible, task-based.

Responsibilities

• Author prompts and scenarios that probe the boundary between safe and unsafe requests in your field
• Review and classify prompts written by other experts as safe or unsafe
• Write the domain analysis behind each judgment: why a prompt is acceptable or where it crosses a line
• Revise your work based on structured reviewer feedback

Required qualifications

• Citizen of a Five Eyes country: United States, United Kingdom, Canada, Australia, or New Zealand
• Physically located in one of those five countries while doing the work
• Able to explain the technical reasoning behind a safety judgment clearly and precisely
• Master's degree or higher in health physics, radiochemistry, nuclear engineering, or a closely related discipline

Preferred qualifications

• Prior experience in AI evaluation, red teaming, or data annotation work
• Professional experience as a radiation safety officer, health physicist, or radiochemist, or in radioactive source or waste management

Why apply

• $150/hr equivalent, paid at $85 per approved task
• Remote and flexible: task-based work on your own schedule
• Use your expertise to directly shape how AI models handle safety-critical questions in your field

Where you can work

This role is 100% remote, for applicants located in these 5 countries: Australia, Canada, United Kingdom, New Zealand and United States.