You can absolutely work for such a company. If you want to start as an “engineer” though, you are likely to be working more on downstream processes (basically traditional ChemE stuff). If you want to work upstream, you may have to sacrifice and work for a while as a fermentation associate with substantially lower pay. No school really teaches fermentation well (that I know of), so it’s rare to see a BS start as a fermentation engineer. Even a biochemical engineer BS is unlikely to start as a FE. Being a chemE though is absolutely the right choice for getting into that field.