If there are organizations that I would prefer to work with, should I mention it in my essay?

We suggest that you write about the work that you would ultimately like to accomplish in an internship rather than specific organizations at which you would like to work. In doing so, you keep your options open and will not miss out on a perfect match between your own goals and those of varying agencies. Internship positions in human resources, accounting, policy, and public relations, to name just a few, are available at most of our partner organizations.