Choosing a design pattern for a given specification [closed]

An organization can be thought of as a series of Organisational Units - Divisions, Faculties, and Schools. Each Organisational The unit has a head (e.g., the Dean of Engineering, Head of CSE), a manager, and a series of supporting staff affiliated with the unit and contain other Organisational Units. Schools can offer courses and cannot contain other organizational units. Select the most suitable Design Pattern to model this system

My Thoughts:
I cannot think of a design pattern in this case as this just seems to me a simple set of classes etc.