No they're not. How high are you
Tell me where in the definition says that you working / being in the military makes you a civilian. The civilian definition specifically says "not in the armed forces" aka not in a military job position.
You're just pulling stuff out of your ass at this point
Military*
Here's how it works in the world:
There are nuclear scientists, who receive an education in nuclear engineering. They can either apply for a job at a private sector, such as a nuclear plant that produces energy, or a government agency, such as a nuclear facility that develops weapons. Regardless of which agency you work for, you are still a civilian worker.
There is no such thing as a field nuclear scientist. The military doesn't train nuclear scientists as a specialized field. They do, however, utilize nuclear scientists in their facilities. If you're a security guard at the facility, you may have received specialized training and may be part of the military. The nuclear scientists, however, are not.
so it's not about you losing sleep over some NK engineers who want to mass-murder innocent people, it's about diplomacy?
being born into a country that is repressive, trying to earn a wage to support your family isn't the same as wanting to 'Flash Mob' innocent people.
Engineers are non-combatants. they do not intentionally contribute to conflict, they just work, are present in the field and are civilians.