Maybe I should add....Not only Team Rocket, but probably more successful than all the "teams" combined.
I would probably apply for a position as Gym Leader/Elite Four for the Fire type, since a lot of my favorite Pokemon are of that type. (Gen. 2 Fire starters, Gen. 5 Fire starters, Victini, Moltres, to name just a few.) If the league rejected me, I would just start earning Badges left and right (my Typhlosion, after all, played a key role in beating SS) and after beating the Champion, I'd be all "How you like me now?!" Hahaha.....yeah...the look on his/her face would be just priceless.