:pPlease no comments on the theme of “who would want to?!”.
I’m asking if it is even literally possible, or if anyone has done it? Lets say a NK embassy worker falls in love with and marries a foreigner, is there a path for emigration?
One can defect.
Highly unlikely
The better question is
"Is there any circumstance in which North Korea must take you ? "
The only circumstance is that you are already and solely a North Korean citizen.
Marrying a North Korean citizen would likely work if you are female,marrying a working male of course.
Most countries allow the Minister to allow immigration to anybody despite any circumstance…
Without access to a North Korean lawyer I doubt we can say this for sure; there may be other cases in which the state is nominally obliged to accept you, at least temporarily. For example, many states have laws guaranteeing the protection of refugees who enter the country, legally or illegally. Though the DPRK isn’t a signatory to the United Nations Convention Relating to the Status of Refugees, who’s to say they don’t have any domestic legislation extending similar protections?
If you’re really curious, I’d try contacting the Chinese embassy in your country. They could probably point you to an official document, maybe even an english-language version.
Are you a world famous nuclear scientist? That might help.
a guy who " lived in North Korea from 1965 to 2004 after deserting his unit and crossing the Korean Demilitarized Zone.[…"
i bet the initial contact was a bit tricky though.
Wow, he seems like an interesting character.
This dude has a DPRK passport, but is a non-citizen for reasons I can’t figure out.
Where do you have to be running from that NK is a better alternative?
I’m guessing morbid curiosity is all. I would kind of be interested in knowing, too.
If you give me a few weeks, I might be able to think of somewhere.
It may be legally possible but grammatically impossible. 
(One can immigrate to a country but can only emigrate from a country.)
NK has lawyers?
Not fully a joke. What’s their legal system like? Adversarial? Do they are the police and judicial powers separate? Do they have any defence advocates at all?
Have you read his other threads? grude’s family life is completely exhausting. ;)
One starting point may be the Inspector O series of mystery novels set in NoKo.
The linked article doesn’t say that he has a DPRK passport.
Nor does it say that he is a non-citizen, though it does strongly imply it. The reason why he would not be a citizen is not difficult to figure out; nothing in the article suggests that he would qualify for citizenship by birth or descent, so if he did become a citizen it would be by naturalisation, and presumably he has never taken steps to be naturalised.
The legal system appears to be based on the inquisitorial system. You can read the basics of the legal system in §8 of the country’s constitution. The judiciary is independent, with criminal trials generally conducted in public by a judge and two lay magistrates, or in exceptional cases by three judges. The accused are constitutionally guaranteed the right of defence. Of course, this is all according to the DPRK government. If you ask the US government, they will tell you that “The North Korean system does not operate according to the rule of law, and foreigners should harbor no expectations regarding due process.”
Indeed. In this article he even goes so far as to claim that he doesn’t need a passport to enter North Korea.