I think pre. And it makes no sense for God's church to go through the tribulation that is appointed for Israel. The church is not mentioned after Rev. 3, during the time of the great tribulation, but does reappear in chapter 19 when Jesus returns.
For God did not appoint us to wrath, but to obtain salvation through our Lord Jesus Christ, who died for us, that whether we wake or sleep, we should live together with Him. Therefore comfort each other and edify one another, just as you also are doing. (1 Thessalonians 4:9-11)
Would not be comforting to know that you had to go through the tribulation period.
Blessings in Christ,
ElBob