Both. So we all want to move up to the next level or be a head coach. So if head coach gets canned at my job, usually many to all of the assistants get fired too. Or maybe i just didnt vibe personally or did a bad job. Or someone better becomes available. Now lets say i am a wide receivers coach, and there's an opening for an offensive coordinator, im going to apply for that. A mixed bag of reasons. I coach track, so i used football terms hoping it would make sense!