Before you wipe your BlackBerry device, consider backing up your data on a computer. A security wipe is designed to permanently delete your data so it can't be recovered. This includes email accounts, downloaded apps, media files, documents, browser bookmarks, and settings.
Settings > Security and Privacy > Security
Wipe.
If you no longer want to associate your device with your organization's network, you can remove only your work space. The apps and files stored in your personal space are left intact.