You have a decent GMAT score and good GPA. You stand a fair chances in getting into a top 20 business schools. As per your profie I would suggest you to target Columbia, Kellogg, Dartmouth tuck and Duke. You can write lot about achievements at work place in application essays and demonstrate leadership traits, maturity, professionalism and other aptitudes during final interviews. You can try your chances in b-school by clicking http://goo.gl/em5DX
Feel free to post any other queries you might have. You can also PM your number to have a detail discussion on your profile and selection of b-schools.
General Education- Empowering Intellect