Hard to say really. You could be any tier. Basically, I don't really have enough info from you. I don't know how long you worked in each job, nor how many promotions you have. Tell me a bit more about your main responsibilities, if you lead anyone, if you got any awards. Also, do you have any extra stuff? Like extra curriculars? Political involvement? Volunteerwork? Sports? All of this counts too! But of course, one of the major items that will define your possibilities is your GMAT. So I guess you haven't taken it yet... but if you give us your score after you take it, along with all the above info, we can be more precise in advising you.