champion of change

From King Business Dictionary
Related topics: Conditions of employment
champion of changeˌchampion of ˈchange noun [countable]1someone in a senior position who supports and encourages changes in the way that an organization operatesGovernor Tanaka became known as a champion of change in local government.2HUMAN RESOURCES someone who is in charge of a programme to change the way that a company operatesOne of my key responsibilities was to be the champion of change within the organization.