OpenTrain is hiring part-time CBRN Safety RLHF Experts to review prompts, classify CBRN-related safety risks, rank model responses, and provide expert feedback for AI training. Candidates must have professional experience in chemistry/biochemistry, radiology, nuclear, or explosives, alongside background in AI/LLM evaluation or red teaming and fluent English proficiency. The remote contractor position is open to applicants in the US, UK, Canada, Australia, New Zealand, Germany, France, Spain, Portugal, and Italy.