I've seen cases of people without phDs at national labs who are doing research--but it's rare. I would suggest that you figure out who the actual researchers are who are involved with the project and contact them (personally, I would send and email and then follow it up with a phone call) and see if you could chat with them about the project and where you might fit in. It might be possible that there is a position that you might be able to step in with your current qualifications and see how you like it and if you want to pursue a phD while you work there. Do you live reasonably close to the facility? Would you be able to stop in during your free time?