Catchafire is an organization that pairs professionals with nonprofits to work on clearly defined pro bono projects.
This is a great way to gain experience working for a nonprofit without ending up overcommitted, burnt-out and frustrated. The nonprofit or social purpose business that you are partnered with can become a strong advocate for your career mission and a great skill credibility reference for your next job.
Unsure of whether you should be working for free? Decide When to Work for Free