That has been exactly my experience as well. There exist job places where &quot;the requirements is in his head&quot; is considered normal and in order and there is too much respect given to such &quot;job security&quot; selfish a<i></i>es who never share things voluntarily.<p>As contrast,  at an earlier work place there were &quot;mentors&quot; introducing newcomers to the domain holding introductory crash courses and doing code reviews. I understand why so many job posts here in Sweden stress the importance of knowledge sharing for common (not individual) success. Sharing knowledge means that more people can share the burden - not the other way around.