Washington (CNN) -- Analysts and sources say a combination of experience working with the CIA in the field and political considerations are behind President Barack Obama's expected nomination of Gen. David Petraeus to be the next director of the Central Intelligence Agency. Petraeus, the 58-year-old four-star general who commands the U.S.-led international military force in Afghanistan, represents a new breed of military leader well-versed in counter-insurgency strategies that depend on coordination and cooperation with the CIA, analysts say. His experience and strong contacts in the major foreign-policy hot spots for the Obama administration -- Iraq, Afghanistan and Pakistan -- provide strategic value for the leader of CIA operations on the ground in those countries, according to security experts.
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NEW: Sources say Petraeus will resign from the military once confirmed
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The decorated general is expected to be nominated to be CIA director
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Sources say Petraeus didn't want to become Joint Chiefs chairman
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Analysts cite Petraeus' experience working with the CIA in battle zones
In heading the U.S.-led military missions in both Iraq and Afghanistan, he has experienced and benefited from the CIA's support and increased the @placeholder role, including the operation of unmanned drone strikes in Pakistan.