Don't worry about them, people who practice job protectionism are the least effective people in an organisation. As they are so focused on their job title and status, that they entirely miss what the job is actually about.

Of course they will feel threatened, when new people not only learn the info they have been hogging, but also put it to far better use than the old guard.

The key is to not turn into one of 'them', always ask yourself how you can contribute to the company, that way the knowledge you acquire becomes dynamite! :-)

Cg