My partner worked for a year in ground crew operations. On peak seasons (April to november)  he's rostered for 7 nights on, 7 off. From December to March he's rostered for 4 shifts on, 2 off. Can't request shifts, can't really request days off. Shifts were shite. Times are not fixed so he would be having shifts that starts at 4am, the next day could be earlier or later so the sleep hours is messed up. Not even factoring the travel hours back and forth the airport. The pay is only 15.81 per hour, day or night shift. On night shifts it's worse, the staff number would only be 3 or 4 at the start and they would be handling sometimes at max 30 or so flights. Then the pay for petrol, and tolls. And you can just see him slipping away into exhaustion. We had a kid and his 2nd week of paternity leave coincided on his week of days off after 7 nights and he was told that he can't get an extra week off even if it's filed as paternity leave week. People he worked with were also probably fed up with the job that they just go about lazy during the working hours which meant more work for him. One time there was a storm that affected our side of town and he was scolded when he called off sick cos the roads are blocked with fallen trees and the winds would make it unsafe for him to travel to work. One of the last straws. He left the job. He had a letter afterwards telling him he owe the company a little less than a grand because he was overpaid by the company. He still had some holidays left unclaimed at the time. That job will eat you alive. My son wouldn't have had a father to play and grow up with if he had continued to work there.