Pros
In this company you will find any process needed to understand the mining industry and several heavy industry processes. They also spend significant resources in geothermal exploration and solar panel research, if you are interested in the use of renewable energy in the heavy industry, this is a good place to learn.
Cons
Unreasonable policies to keep employees as much time as possible on the site of the mine, while many of the engineering tasks required could easily get done in Iquique or Santiago.