Maintenance personnel work a 4/10 schedule with overtime optional based on a rotating average of all your peers. You choose every day to be a "Yes" or a "No" for overtime if it is offered. Pager-duty is required yearly and is typically not more than 4 weeks at a time. Pager call-outs are supposed to be for emergencies only. Typical employees probably average about 250+ hours of OT a year, but more can be had if you want it.
Turnarounds are offered to senior personnel before junior personnel. Pension, healthcare, performance bonus, dental, vision, tuition reimbursement and employee discounts are offered. This list is not exhaustive.
It's a very good place to work, especially if you are part of the union (USW). Supervision is professional and helpful but bad apples do exist, typical of any job.
Good culture, Union representation for maintenance employees, opportunities for advancement