Conversation so far:
When did Brett Hull get started in management?
Brett Hull got started in management in 2007.
What company gave Brett Hull his start in management?
NHL gave Brett Hull his start in team management.
Did Brett Hull have any other positions within NHL?
Brett Hull also dealt with studio analysis while with NHL.
How long did Brett Hull work with NHL?
Did Brett Hull go to a different team after that?

Question: How long was he with the team altogether?
Self-contained rewrite: How long was Brett Hull with NHL altogether?