Not just your current knowledge or other skills beyond the cost.
If not, then you are still young, and it is possible to change careers smoothly after just working for a few years. Learning from scratch is a big deal.
If you are old, this is embarrassing. From Q user: Mr. Yang
I am also a cost engineer, but I have worked for a year and have never been exposed to this major at all. Q user: user 98 10447.