There was a genuine organizational emphasis on being a kind person who was invested in doing good in the world.
Cons
Some folks wanted to work at all hours which could create a feeling -- though this certainly wasn't the case among all staff-- that they had to be on at all sorts of hours.
Excellent people. Very smart, very dedicated. That is really the secret behind the brand. Work is varied and interesting -- you will have no shortage of challenging projects. And supervisors are very supportive of individual growth, helping you find opportunities to build new skills. People make careers at Mathematica, which says a lot. Leadership is stable and forward-thinking. And they offer a professional yet highly flexible and accommodating work environment. A great place for wonky types.
Cons
Pay is not the most competitive, but is compensated by overall benefits package including shares in the employee-owned company.