There are four key roles in organizational change. They are as follows:
Change owner:
The change owner is accountable for the entire change management process, including its improvement. Since they're responsible for change management at their organization, they're usually a high-ranking official.
Change manager:
The change manager handles the implementation of the change and the activities related to it. They also manage the CAB and the various teams and stakeholders involved, and coordinate with them.
Change initiator:
The change initiator is the one who initiates the change and adds the change plans, implementation plans, and other required details. They also organize the change implementation plan. A change initiator can either be a technician or an end user.
CAB:
The CAB is a collection of various members from different teams and job functions. Together they analyze the proposed change and give their approval and recommendations regarding the change and its implementation.