Brian,
How long does it normally take them to reach that level?
How many hours and how many days a week, on average do they have to put in for that salary?
Our lowest seniority crew specialist has been with us about 8 years. We don't hire people to be specialists, everyone starts as an assistant and works their way through the ranks.
We have a 2 week rotating schedule that has been pretty effective for us. We have half our crews work Monday through Friday, then have Saturday, Sunday and Monday as optional days. They then work Tuesday through Saturday with Sunday as an optional day. The other half of the crews work just the opposite schedule. If Saturday and/or Sunday are your 6th day worked that week, then you get overtime... Most crews work their optional Monday so that makes that next Saturday overtime. Usually at least half the crews that have Saturday as an optional day work it, giving us around 75% capacity for most Saturdays.
The typical day starts at 7:30 and ends at 3-4 in the afternoon.
We also pay an overtime rate for evening work as well.