Nope, not just a rep thing.
Currently, the Engineering site is in beta. As such, we don't have any defined migration paths set up.
Once we graduate, the community needs to decide which site(s) we ought to have defined migration paths set up for. Off-hand, I'd think that Electrical (Electronics?) Engineering, Mathematics, and Physics would be candidates for us to consider.
But until we graduate, you ought to flag the question and patiently wait for your kind hearted janitorial staff to handle the flag. And don't worry about the question already having been closed. The site mods can re-open and then close with a migrate easily enough.
Normally, we're handling flags within 2 - 3 hours on average. I suspect that because today is Thanksgiving in the US and all the mods are US based that we're a bit behind on keeping up with our janitorial duties. Sorry about that.