Another Catholic checking in. The Mary, Queen of the Universe Basilica has approximately eleventy billion mass times Saturday evening and all day Sunday, plus daily mass every day. If you're scheduled to work during all possible mass times, (and many weeks, you will be) then you're excused from going to Mass.
Since I was at work nearly every Saturday and Sunday for often insane amounts of hours, I was not at Mass most Sundays. That said, since I usually had Wednesday and Thursday off, I'd usually find my way to a daily mass on Thursday, which based on the way I was scheduled was the closest thing to Sunday I had while down there.
(Hint: Once you get down there, you're likely going to hear the sentence "Today is my Monday/Friday/etc." a LOT. If you work Friday through Tuesday, with W/Th off, then Saturday would be your Tuesday, etc.)