You can hire anyone familiar with this area in the law, as long as he or she is licensed in Oregon. Sometimes it's possible to arrange for a phone or Skype appointment, even a paid one, by paying by credit card or check in advance. Gas is expensive.
I can't give out names of individuals attorneys, but can give you links to organizations where you are more likely to find someone. I'd look for someone with at least five years solid employment law experience.
Don't actually HIRE an attorney without first checking references. And don't try to pick the attorney's brain on the phone. Schedule an appointment and visit the office, like you would for a doctor! (Or psychologist).
I can't find a link, but there is an association of employment attorneys in Oregon, too. You can probably find it through nela.org
Keep in mind that just because someone joins one of these organizations doesn't mean they're any good. It's very important to check references, and ask questions such as "does the attorney procrastinate?" "Have understandable agreements and invoices?" "Return phone calls?" Etc. (Besides an understanding of the law, of course.
You can ask me followup questions even after you accept. I'll be here. :)