I'm starting a second play through and am wondering, can "jammed doors" be opened without an engineer in the party? I had one in the group as my 2nd crawler in my first play through and never had a problem with doors. In this re-play I wanted to use as different a group as possible. I've got a cyberninja and a force psyker and have the cash to add the 3rd to party. On 2 tries thus far where I picked up a hacker as the 3rd crawler and tried a side mission I have not been able to complete the missions as mission goals were behind jammed doors and even with 10 attempts this group can't seem to open them. I appreciate your thoughts!

There are some jammed doors which are near impossible to open, but I never had a situation where they were mandatory to complete the mission. There's usually an alternate path that doesn't require anything impossible.

There are also one-time items to open them.