Why not have engineers in different time zones? 12:30am on EST is 3:30pm AEST (Australian Eastern Standard Time) and 7:30am in London. That way you have skill

Why not have engineers in different time zones? 12:30am on EST is 3:30pm AEST (Australian Eastern Standard Time) and 7:30am in London. That way you have skilled people awake all hours should a major issue develop. These people can fix the problems while US based clients are sleeping and non-US clients aren't stuck with waisting a day with less severe faults because the engineers only work 9 to 5 PST.