In all, some 450 staff are employed in the nuclear safety activities of ONR. Sixty per cent are technical staff qualified to honours degree level or above. Technical staff join only after they have the equivalent status of corporate members of a senior professional engineering or scientific institution. This means that most of them will have been in industry for ten years or more before joining ONR. In most cases, their work will have been in the nuclear industry. ONR’s work calls for a high level of expertise and a wide range of disciplines. All the technical skills found in any engineering based industry are to be found in ONR, as well as reactor physics and radiological protection. More specialised areas are needed too, such as pressure vessel technology, metallurgy, seismology, heat transfer, and there is, of course, a strong emphasis on human factors, quality management and the management of safety.
Most of the other staff are professional administrative civil servants, many of whom have experience in other parts of HSE. They play a major role in the operation of the planning and management information systems, and provide the contact point for parliamentary and ministerial business and with the rest of HSE, and deal with HSE's policy on research. They also set up and arrange briefing for ONR staff visiting abroad or for those who are to meet visitors from other countries.
ONR staff are based in HSE office’s in Bootle, Merseyside, Cheltenham and Rose Court.