It feels like cliques dominate among some groups of long time employees. It is difficult for new employees to feel welcome because of that. Also, like most organizations there are a few known office gossips who stir up rumor mills or feed ideas that "everyone" is disgruntled (that's actually not true). Some employees who have been at the organization for years, do just enough to slide by, no more, no less (this isn't all long time employees, and not the majority, but there are a few and it is frustrating to others who work hard).