If you have restrictions on availability that you haven't already stated please advise here. Grounds shifts generally start at 8 am, 9 am, 10 am, 1 pm, 3 pm, 6 pm and 7 pm. Maintenance shifts generally start at 7 or 8 am. Operations (rides, food, cashiers, games, operating grounds) generally start at 5pm or later during the week and 11am or later on the weekends. Office shifts vary. You would generally be expected to work at least a 3 hour shift.