Cram joined the CIA in 1950. Much of his career concentrated on counter-intelligence operations in Britain.
As deputy chief of the London Station in 1965, he was able to escort two members of the President's Foreign Intelligence Advisory Board around Britain's intelligence facilities without explaining their mission to his hosts. The resulting report criticised MI5 chief Sir Roger Hollis and recommended an expanded CIA station in London. It was later leaked by James Angleton to MI5's Peter Wright, with the subsequent furore leading to Cram's departure from London.
After London, was posted as station chief in the Netherland. At the time of his retirement, he was head of the CIA station in Canada. Cram served at some point as the CIA representative to the NATO Security Committee.
In 1976, a year after retiring, he was brought back to the CIA to conduct a special investigation into Angleton's conduct as head of CIA counterintelligence. Cramtook six years to produce an 11 volume study.
- NameBase CRAM CLEVELAND C
- Harold Jackson, Set a spy to catch a spy, The Guardian, 20 January 1999.
- David Wise, Molehunt: How the Search for a Phantom Traitor Shattered the CIA, Avon Books, 1992, pp.281-282.
- David Wise, Molehunt: How the Search for a Phantom Traitor Shattered the CIA, Avon Books, 1992, pp.282.