Operations contractor Magnox is looking for engineers for a nuclear decommissioning framework worth up to £140M.
The firm, which runs 10 UK nuclear sites, advertised the four-year agreement in OJEU.
It is expecting to appoint 35 firms across various engineering, architectural, technical and scientific disciplines.
Several other public bodies, including the Nuclear Decommissioning Authority, will be able to use the framework.
Contractors have until 17 June to register an interest in the work.