No. CoreRated is designed to carry out the key functions of an event sustainability consultant, with criteria and guidance aligned to ISO practices and other relevant international standards. The tool provides clear, step-by-step prompts and evidence guidance so that most organisers can manage the process themselves, even if they are new to sustainability. You are of course free to work with a consultant if you want additional bespoke support, but it is not a requirement for using CoreRated or achieving certification.