Pros
The benefits are great and include very generous vacation time, personal time, health insurance and many additional discounts and other voluntary benefits.
Cons
Definitely the old boys network rules here. If you don't have company connections, it's difficult to get hired and/or once hire, to make a move. Management is from the 1970s-1980s school of management style - do as I say, don't question my authority, etc. If you have outside experience, expect to have them completely discount / disregard that experience. If it isn't Caterpillar experience, it isn't anything. If you are hired as what they call a "mid-career" hire (someone with 5 or more years of outside experience), they will bring you in at the very bottom of the pay scale, and not advance your pay at an appropriate rate, either. Not very woman or minority friendly. A place for white males. Expect to put in some long hours.