I work in an organization that is both Functional and a Matrix organization. We essentially use project managers within departments that lead the projects with a staff beneath them. Most of the project managers pertain to Engineering. There is definitely silos that form behind the departments in which it becomes “tribal” knowledge since some information is only known within the departments and by certain people. The matrix characteristics of the company come from the project managers hand picking people from functional groups to form part of the project team. Most of the project managers pertain to engineering type projects.