Given the historical treatment of legitimate whistle blowers, I am inclined to believe Tice before the NSA.
Perhaps NSA treated him shoddily, but his "China spy" colleague from DIA was fully exonerated.
Can't find the report on the web, even though it's unclassified.
Given the way "whistle-blowers" are protected, while their accused tend to have no rights nor recourse against false accusations, I am inclined to take Tice's allegations with a rather skeptical eye.
That presents "special" problems, and obligations on the part of the potential whistleblower.
He should have considered this before hiring on with NSA.