Complex sentence: After Red Cell was disbanded Chalker transitioned back to SEAL Team Six and eventually received the assignment to become the Command Master Chief at the Training Center Command for BUD/S (Basic Underwater Demolition/SEALs) Training in Coronado, California.
Split into simpler sentences: After Red Cell was disbanded Chalker transitioned back to SEAL Team Six. His final duty station was as the Command Master Chief at the Training Center Command for BUD/S (Basic Underwater Demolition/SEALs) Training in Coronado, California.