Finally, there are two mainstays of the aerospace industry which are crucial for professionals to stay in their jobs over a long period of time. Most aerospace companies provide paid leave, typically four to six weeks annually, which is meant to give professionals time to unwind and leave their desks or work stations for a little while. As well, a long term human resources investment for these companies comes with their pension program. Aerospace companies will often match a certain level of employee contributions in order to keep skilled workers from leaving for jobs with rival companies.