Every time someone new joins your team, the whole team changes. Dynamics shift. Relationships move. Routines get modified and values get passed on or passed over.
Even if you've delegated the task of welcoming and orienting new team members (by the way, congratulations on delegating!) as the team leader you still have the profound responsibility of helping that new team member succeed in the service of the team and in the development of their individual goals.
Ignore that responsibility, and everything slips. Focus on the value of each and every team member, and everything strengthens.
Remember that a new hire is just learning what it takes to prosper in your team. Why not make certain that they learn successfully?
-- doug smith