Here some references of Ingo Swann and Hal Puthoff about Scientology on Wikipedia :
Puthoff took an interest in the Church of Scientology in the late 1960s and reached what was then the top OT VII level by 1971. Puthoff wrote up his "wins" for a Scientology publication, claiming to have achieved "remote viewing" abilities
Ingo Swann was interviewed in "Advance!" magazine, published by the Church of Scientology, as Scientology "Clear #2331, Full OT VII and Class VI auditor", on at least three occasions between 1973 and 1978. In "Advance!" issue 21 (Oct/Nov 1973, UK edition), he was asked by the magazine: "How did these [psychic] abilities develop with relationship to your auditing on the [Scientology] OT Levels?" to which he answered "They are solely the result of auditing. Not particularly even the OT Levels. I had extremely good gains from the lower grades. And some had developed certainly by the time [Scientology] Power Processing took place. But steady good control over them, the control I have now -- which is not perfect by the way -- occurred after the completion of OT III Expanded, and is even better than ever now that I have finished OT VII. So they are solely the result of auditing.