You don't need to redo the ATP if you completed it. There are 2 steps: the written and flight. The flight has to be done within 24 months of the written or you start again. So you have to retake the FE written but not the ATP. Ignore the UPS bashing that goes on here. I think that when the contract is done most will consider UPS the best job among the airlines. Plus our process is quicker if you have the contacts.