PostgreSQL-related legal question

I've been asked to sign a legal document related to a PostgreSQL-
related job opening. I have concerns about the document and that
signing it could have a negative impact on the PostgreSQL project
(in addition to personal concerns).

I'm guessing I'm not the first person to go through this. I'm
hoping someone on this list can refer me to a lawyer who is
familiar with the challenges of NDAs and open source projects.

I'm not asking for pro-bono, I'm willing to pay for services,
but I just figured that I might get better results getting a
referral than by contacting $random_legal_service.

--
Bill Moran