My husband is in Recruit training for the USMC..?

He just left on May 2nd for boot camp. His training is in San Diego. Although he chose logistics he was told he could change his MOS after boot-camp. If he is stuck with logistics will he still have the same possibility of going to any base? Or are all logistic jobs strictly stationed at logistic labeled bases only? Can someone please fill me in? I understand its depends on where they need you at the time but questioned whether it was the same for logistics.