Pros: free launches, transportation, nice woring team, good medical plan.
Cons: low salary, proyect work's (project ends, job ends)
In CH2MHill you could learn a lot of things about projects. We have a good organization structure & projects tools.
Maybe in developing countries like Argentina, salaries are low compared with other places.
I think, the most valuable thing is the nice working team and good people of the firm.