I don't know. My grandfather worked for Martin Marietta, and they are on the Masonic plaque at the Denver Airport. He worked on parts for the later Apollo missions. So I'd be willing to bet he worked with plenty of Masons, at the least.

My grandmother on that side was intensely Catholic, and the both of them basically never left the house, so I doubt they were Masonic.

I've gone to a Masonic lodge on a whim before, and no joke, an old woman answered the door, completely disheveled, with a bright red stain on the corner of her mouth. She was quite gruff and basically ended up closing the door on me. Very weird. I thought they wanted members, right?