Anecdotally, I knew some guys who worked at (or with?) the global security division at Sony US HQ.

The story went that each of the Sony subsidiaries[1] had their own security division that was largely autonomous for reasons of politics and budget, of course. Each part of the company had different vendors, different policies and procedures, and different philosophies on how security should be implemented.

When they would all send their representatives to have a global security pow wow, however often it happened, it ended up like an episode of game of thrones.

[1] http://en.wikipedia.org/wiki/Sony_Corporation_shareholders_a...