Hello Francisco, welcome to the forum. Erm, I'm not really an expert in what you can do with a PhD in advertising and printing technology. However, using Google (hint) and the return button on my keyboard, I found this: http://www.careerjet.com/job/dcd29775d0ff3900d2d63546576d5ee8.html
Hi Francisco,
Have a look at the job section of Chronicle of Higher Education, perhaps you'll find some good offers there:
http://chronicle.com/section/Jobs/61/
Good luck with your search!