Pros

Looks ok on your CV
A number of internal-external training courses to be taken after joining
Once you start performing, there is job security
Its easy to move horizontally on the organization chart
The people are good to work with

Cons

After you finish "the list" of training courses required for your job, you have to push hard for further training
You will develop till you start performing well in your job, and then their is not much to gain afterward
No clear career path (Vertically)
Management change positions more often than other companies and your past victories could be forgotten with the old Mgt team.
Salaries not equal for staff on the same grade (Big differences in some cases)

Advice to Senior Management

DHL is a large organization and the way its intended to be managed is not the same as whats actually on the ground (in some regions).
More attention should be given to recruit high calibers and provide them with the development, career paths and salaries that retain them.