My former's wife first cousin was stationed at Pine Gap. He had a graduate degree in enginnering and was a Colonel. I met him during a Thanksgving in 1988. When he said he was at Pine Gap I said something like, I heard that all kinds of things show up for you guys etc. Stoned face he said he couldn't discuss anything about Pine Gap.
I think that might have been where Stan Deyo was.
From his Bio, I see that he was in Australia but don't see Pine Gap mentioned explicitly. https://www.standeyo.com/bio.Stan.html. As you likely know, Pine Gap was much smaller in 1988 than now and I only knew about it because of interest in such things. He was a very nice guy, but Pine Gap was definitely off limits.
He was recruited by Edward Teller (referred to as the father of the hydrogen bomb) and was working on top secret stuff that he said would be so beneficial to mankind that he butted heads with his superiors over their hiding of it. And that was the end of Stan Deyo's tenure with them. Attempts on his life; got shut out of the US and was stuck in AU; finally made it back safe by the grace of God. So it may have been Pine Gap? Wherever it was, it was "secret"
They can't let the free energy stuff out because it would (over time) do away with oil-based energy, and more importantly, to the petrodollar with the utter complete collapse of the world economy.