They are the most unlikely architects of the CIA’s programme of torture. Two psychologists who swore to heal not harm.

Now it has been revealed that two doctors, identified by the pseudonyms Dr Grayson Swigert and Dr Hammond Dunbar, were paid $81 million by the CIA to help develop and implement a seven-year programme that included "enhanced interrogation techniques" such as waterboarding, placing detainees in stress positions and sleep deprivation.

Until now, little was known about the pair, who the New York Times has named as James Mitchell and Bruce Jessen.

According to the declassifed documents, they created the programme in 2002 when the CIA took custody of Abu Zubaydah, a Saudi arrested in Pakistan and suspected of being an al-Qaeda lieutenant.

He was taken to an unnamed country, reportedly Thailand, where a prison – “detention site green” - became an experimental laboratory for Swigert and Dunbar to perfect the techniques they had learned at the US Air Force Survival, Evasion, Resistance and Escape (Sere) school where they were based before.

Dr. Bruce Jessen refused to talk with ABC News in 2009, citing a confidentiality agreement with the government. (ABC News)

Dr. James Mitchell refused to talk with ABC News in 2009 (ABC News)

It was at the elite school, often used to train Special Forces troops, that the doctors subjected American soldiers to "coercive interrogation techniques that they might be subjected to if taken prisoner by countries that did not adhere to Geneva protections”.

CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings Show all 12 1 /12 CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings September 2001 Following the 9/11 hijackings by Al-Qaida, US President George Bush signs a Memorandum of Notification that authorises the CIA to capture, detain, and interrogate figures associated with terrorist organisations. CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings October 2001 The Office of Legal Counsel authorises the use of military force to combat terrorist activities within the United States. CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings January 2002 Military guards take first 20 detainees to the Guantanamo Bay detention camp, located in south-eastern Cuba. The prisoners are classed as “enemy combatants” and therefore not subject to the same legal rights as prisoners held under the Geneva Convention. CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings 2002 and 2003 Al-Qaida suspects Khalid Sheikh Mohammed, Abu Zubayda and Abd al-Rahim al-Nashiri are all waterboarded. EPA CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings June 2004 The Supreme Court makes a ruling that reverses a decision saying that Guantanamo Bay lies outside the jurisdiction of the US courts. Detainees now have the right to legally challenge their imprisonment. CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings May 2005 Amnesty International brands Guantanamo Bay the “gulag of our times” in its international report. CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings December 2005 The Detainee Treatment Act of 2005 is passed. CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings February 2006 The United Nations calls unsuccessfully for Guantanamo Bay to be closed. It claims some aspects of the detainees’ treatment amount to torture. CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings December 2007 The CIA admits that it destroyed videotapes made in 2002 that evidenced treatment of Guantanamo Bay detainees. Getty Images CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings January 2009 Newly-elected US president Barack Obama pledges to close Guantanamo Bay within 12 months. He later renegades on the bid. GETTY IMAGES CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings December 2013 The Report of the Detainee Inquiry is published. Chairman Sir Peter Gibson concludes that British intelligence officers were aware of detainees’ mistreatment. CIA 'torture' report: Timeline from 9/11 to Dianne Feinstein's findings December 2014 The Justice Department asks the US appeals court to overturn a decision to allow the release 32 videos that depict Guantanamo guards forcibly removing a Syrian detainee from his cell and subjecting him to forced feedings. The Senate Select Committee on Intelligence, chaired by Dianne Feinstein, releases its report.

Neither doctor had any experience as an interrogator; neither had knowledge of al-Qaeda. Swigert, however, had reviewed literature on “learned helplessness in which individuals might become passive and depressed in response to adverse or uncontrollable events”.

Such helplessness, he imagined before joining the CIA’s programme, could “encourage a detainee to cooperate and provide information”.

After the detention of Zubaydah, the doctors’ programme – authorised by Justice Department lawyers – was expanded with detainees taken to secret prisons in Poland, Romania, Lithuania and other countries, or “partners” as they are referred to in the report.

CIA suspect Abu Zubaydah (AP)

During Swigert’s pitch for the programme he described 12 SERE techniques that could prove useful to the CIA. They were: “The attention grasp, walling, facial hold, facial slap, cramped confinement, standing, stress positions, sleep deprivation, water-board, use of diapers, use of insects, and mock burial.”

A year after Swigert and Dunbar began the torture (or “enhanced interrogation techniques”), a senior CIA interrogator would tell colleagues that their model at SERE was “based on resisting North Vietnamese physical torture” and “designed to extract confessions”.

Indeed, the interrogation was prioritised over the health of the detainee. One declassified cable says the interrogation team understood that “interrogation process takes precedence over preventative medical procedures”.

Four years after it began, the programme was at an end when George W Bush ordered detainees to be taken to Guantanamo Bay, and another form of torture began.

But Swigert and Dunbar had by that time realised their invention was lucrative and formed a company to conduct their work with the CIA.

The CIA’s contract with that company was in excess of $180million and the pair received in excess of $81m before the deal was terminated in 2009.

Before that, the CIA had provided a “indemnification agreement” to “protect the company and its employees from legal liability arising out of the programme”.