Getting New People on the Team

Sometimes adding new people to a team is like a tug-of-war.
The team members that are  already in place want to stick to what they know, who they know and what they do.  They have difficulty giving up old systems, routines, plans, ways of working or thinking because they feel that it worked in the past.
The difficulty comes from lack of familiarity - it is important for new people to be properly introduced to a new team so that their qualifications and background are presented to help the group understand why this person was brought on.
Open-mindedness and new ways of working will evolve as the team develops in their relationship.  It will take time.  Be patient and listen to both the team and the new individual - their feedback will tell you everything you need to know about where the future will be.