Field technicians work 44 hours a week, 7:00 a.m. - 4:30 p.m. But in reality, you will end up doing closer to 47-50 hours, sometimes even more. Long working hours, but any additional time you do immediately counts as overtime, so good potential for money. Sometimes you will do night shifts, but you are paid a premium of time and half.
Depends of where you work. Office culture is set but also flexible but production hours are set