He has a significant public role as the government's most visible scientific expert.
Many individual government departments have their own departmental chief scientist. The CSA has no formal management responsibility for departmental chief scientists and is free to provide advice to all departments, including those that have their own chief scientist. The CSA and departmental chief scientists sit on a Chief Scientific Adviser's Committee, a cross-departmental forum for the discussion of science issues, chaired by the CSA.
