What's a job that didn't exist when you started working?

I was reading about these new data-center liaison roles springing up — people whose whole job is smoothing things over between tech companies and the towns hosting their servers. Reminded me that when I started in the mills, nobody had a title for half the stuff I do now. What's a job you've seen appear out of nowhere in your lifetime, and do the people doing it know what they're actually in for?