wow this is a great topic - thanks KathyHowe!
i am facing this too - i am trying to move up within my organization, but there just isnt much wiggle room. the few positions that become available seem to go to the squeekiest wheel who has been waiting longer than me...
however! i have done exactly what KathyHowe said - my manager is WELL aware of my aspirations and we are working together to get me there. he is awesome
the hard part is there just isnt that much obvious opportunity. sometimes it takes getting to know a lot of other people in your company and letting them see your value in areas other than the small glimps they see.
you never know what networking will do for you! a lot of times there are discussions about creating positions or taking some project or situation in a new direction and if you know someone in those discussions, your name can get brought up as someone who can make it happen!
so while getting your boss on board is a great step - i would suggest also seeking out a mentor in a position you ultimately want and trying to get to know and showcase your multiple talents to other senior managers!