If you want to arrange something quickly between nations you go through their respective three letter agencies.
(Saying that, I remember reading once that high-flying UK diplomats might be offered something less desirable as a ‘test of nerve’ - to see whether they had enough confidence and self belief to hold out for something better. It’s a never-ending test of character and ability to know which way the wind is blowing, I suppose)
Personally I would have loved the job. Seems like they had lots of free time. Very secure country without much crime. Really not much to worry about, just a bit isolating. Plus some cool stories to tell when you are back home.
Sure, not the type of job for people with family.
What good is that in North Korea? The whole country is basically a prison, and after what happened to Otto, anyone with any sense of self-preservation should want to avoid the place.
Saudi Arabia isn't North Korea, but it's still a lot less free than most developed countries, especially for females like my mother, who were not allowed to drive or work, could not go out alone, and legally forced to wear a stupid black thing in insanely hot weather while all the males of the country wore comfy white clothing.
I don't know the full story of their financials, but all I know is we got free housing, 1 free trip to the US every year, and 3 free vacations per year anywhere in the world, flights, lodging, and all expenses covered. We did lots of things that I believe they wouldn't have been able to do on their own money at the time. They also rented out their house in the US for extra income.
I wouldn't be surprised if diplomats who voluntarily take posts in North Korea also get a shitton of compensation benefits like that.
Less prestigious jobs but also desirable to some are sailors, or worse, submariners, and people working in Antarctica and other remote, hostile places.
Speaking about countries, North Korea is an oppressive dictatorship, but at least, it is not at war, and crime is limited. There are countries where your freedoms are just as or even more limited because you risk getting killed, mugged, kidnapped, etc... if you leave your armored vehicle and armed escort.
The positives of living in North Korea includes getting familiar with one of the most secretive culture in the world. There are some reports about North Koreans being quite joyful. People can have really shitty lives: war, crippling diseases, etc... and still find joy, so that shouldn't be surprising. And also, the article mentions travels, so, not really a prison.
And of course, there is the obvious aspect of compensation, which is probably substantial.