Power Engineering questions

JCEdmonds

I'm in school for electrical engineering right now looking at taking coursework for electrical power, like power plants and such. I did have a few questions about it, and was hoping someone would be able to answer:

Are there engineers involved in maintaining existing equipment, or is it mostly planning and designing?
Does this type of engineer work for local governments, private companies, or both?
What kind of working hours are there? (consistant / changes from week to week; amount)

Thanks!