The Bay of Pigs disaster in 1961 led to the outsting of CIA director Alan Delas and deputy director Richard Bissell.
Bissell notably didn't fade into obscurity.
In Bissell's case, the rumor was he left work at the CIA on Friday and on Monday he returned because he was too indispensable to certain activities he was involved in.
It would certainly make sense, then, that if Maumgren had been read into otherworldly technology by Richard Bissell around this time,
Figures like Richard Bissell, who moved from the CIA into private defense, suggest that real secrecy does not end when someone's ties to an administration does.