Arlington currently has a management Intern position being advertised here:
This will be a PAID, full-time, one-year temporary assignment with Arlington County Government (with potential to renew if funding permits). There are several internships available, including one with our Historic Preservation Program. All of the details can be found in the advertisement. It is indeed rare that we have such opportunities available in our Historic Preservation Program.
They are looking for talented, energetic, and passionate preservationists and history buffs who want to see how an active preservation program at the local government level operates… and who are willing to dive right in and help make a difference!