A probity advisor may occasionally be required but this will depend on the scale, complexity and sensitivity of the project or the procurement method for the project (such as a privately financed project). The role of the probity advisor is to ensure a fair, transparent, defensible and robust process is followed. The probity auditor must be objective and also endorse the probity plan, monitor the procurement process throughout, and provide independent advice to the project team, the steering committee and the Director General of the delivery agency.