Hi, you need to break 700 with your GMAT, and life will be so much easier if you can reach 720. Beyond that, as your experience is good (without seeing your actual resume), it will come down to how you craft your "story" - your professional trajectory, including both your background and future goals.
Schools want to see how logical an MBA "now," at this point in your career, makes the most logical and productive sense. So, for you, the essays, the GMAT, and the interview (if offered) are going to be more important.
[I'm a former Harvard interviewer, and a Harvard grad, currently running the MBA admissions consulting firm: MBA Ivy League]
Jillian
MBA Ivy League
(646) 276-7042 (NYC)
www.MBAIvyLeague.com