What are some job recommendations for people who want to live in extreme isolation?

I am looking for job recommendations to be considered for those who want to live in extreme isolation. Ideally, such a job would be willing to provide any training needed on the basis that no one would want to have this job because of it’s extreme isolation. I would not care. A lighthouse keeper is one that comes into mind. I guess “astronomer” could fit the bill, but this does require quite a bit of study and training to do this in a professional capacity.

Here is an article that covers some jobs of this nature:

http://www.mnn.com/money/green-workplace/stories/6-of-the-loneliest-jobs-in-the-world

I would like to see if anyone could expand on this list described in the article.

No need to ask “why”...

Brian Ghilliotti