Pros
Rio Tinto pays well compared to other companies in the industry. Probably 20% more than the average. However, your salary will never change beyond your starting salary plus a small annual inflation bump.
Cons
Toxic work culture. Very hard to get anything done as everyone is resistant to change. Even if the change is an obviously good idea it will get stalled for months then quietly pulled. Perception prevails over reality. By this I mean the loud shouty career politician types who tell everyone how good they are, are seen as much better than the people who are good at doing the actual work. There is also a "woke" agenda in the workplace that is being heavily pushed by HR so that hiring candidates has nothing to do with actual skill anymore. All the VPs run their divisions like feudal warlords. Internal promotions across business units are almost impossible to get as the managers prefer to just hire their mates. It is very much not a meritocracy.