go work for drone manufacturer
Parent is spot on. You need to find organisations that are "military-friendly".
Generally speaking, the private sector don't like to employ ex-public sector workers (and vice-versa). You need to find a public sector engineering job or a private sector company that mainly does work for the public sector.
The fact you've been out there fighting a war that many people don't agree with isn't going to help matters much outside of the military, even if it is public sector. For example, I think you'll struggle to find work in the health sector; they're not going to take kidnly to the idea that you've spent years of your life maiming people even if you might be a perfect fit to engineer an advanced artificial limb!