A company that has a group of team members that have been working together for a very long time and has had many successful projects and in some...

A company that has a group of team members that have been working together for a very long time and has had many successful projects and in some cases won awards normally would feel very fortunate. New people need to be added to the team. How would management deal with adding new people to the team, although the original team is hesitant to take in any new members because of the team's storied successes.