In a September 24 message to employees of the Central Intelligence Agency, Brennan said it was time "we take a close and honest look at ourselves" and examine whether the spy service needed to be restructured to be more effective.
"I have mentioned several times over the past year that I have become increasingly convinced that the time has come to take a fresh look at how we are organized as an agency and at whether our current structure, and ways of doing business, need adjustment to ensure our future success," Brennan said in the message, portions of which were provided to AFP.
The review was first reported by the Washington Post. And the newspaper, citing current and former intelligence officials, said the overhaul could include dismantling separate spying and analysis divisions in the CIA to build units focused on specific geographic regions or threats.
Boyd said the officers carrying out the review are still "in the information gathering stage" and it was too soon to say what possible options might be in play.
But Boyd said no crisis in particular prompted the review.
"There was not a singular event or singular threat that triggered the review," Boyd told AFP. "We're in a time when there are an incredible number of diverse threats, ranging from cyber to threats in the Middle East, to Ukraine, and others.
