I was on Facebook and found this post shared in a group I'm in. That's my grandfather.
I could tell you a lot of stories but the most important one is that he was an undiagnosed schizophrenic. There are stories I can't even tell because I have to wait for more people to die first.
I've heard him on Coast to Coast and seen a number of interviews with him in the alien conspiracy industry. But not one of them ever mentioned, and he never volunteered, that he was an undiagnosed schizophrenic.
Remember this when you hear people speaking with authority about things they can't back up.
What did your grandfather do for a career? Did he grift and live on that? Or was it more of a compulsion/obsession/hobby?
He didn't start doing aliens for money until long until retirement. That's when he started writing his books, books I thought would never get finished, and being public about how aliens telepathically communicated with him.
As a career he was an engineer for defense contractors back in the day when all engineering happened on a drafting table.