The Commissioner is responsible for investigating complaints about the conduct of MSPs, local authority councillors, members of public bodies and lobbyists.
The Commissioner also regulates how people are appointed to the boards of public bodies in Scotland.
Mr Bruce has been the acting Commissioner since April 2021. A motion to agree his appointment will be considered by the Scottish Parliament on 26 January.
This position is full-time for a single term of six years. The starting salary is £77,260 rising to £92,658.