Pros
There are some brilliant, impressive and talented individuals working there but this is not a place filled with happy, fulfilled people.
Cons
Working at Wellington is like walking into quicksand: if you're happy to stand still then over time you'll survive just by turning up, but the second you try to move forwards, you'll be swallowed into a quagmire of politics and pettiness. Tenure is rewarded over skill or ability meaning toxic individuals get away with persecuting others and favourites excel. Managers are not empowered to make decisions, the power sits with some bigwig in a corner office looking at the bottom line. Don't be fooled into thinking you, your career or development are of any importance. This is evidenced in the sea of leavers, uncompetitive pay and atmosphere of misery. Don't expect your pay to increase with a promotion. Perhaps naive not to have realised this sooner but HR are not there to support you, they are a business function designed to protect the businesses interests, at all times and any cost.