In case you are Following the Nonacademic Track or Recasting Yourself for Non-Academic Jobs (Chronicle of Higher Education). Even if you aren't, you can use the same strategies and sometimes the same resources to research nonprofits, government agencies, and educational institutions.
Private Companies don't have the same filing requirements as public companies, but you may still be able to find some (typically more limited) information. In addition to using Hoover's above, you may also try:
Many of the sources mentioned above will cover higher education, but but here are some specialized sources:
Don't forget to look for Annual Reports, Strategic Plans, student and faculty data and more on the College website.