Jchang66,
Three years is on the lower end for your type of work experience, but you will actually have four years by matriculation. In order to advise you better I would need more info.
1) undergrad school and gpa
2) company, role and salary progression as well as performance relative to peers
3) GMAT or target GMAT if you haven't taken
4) extra curricular activities and leadership
That should get us started. Feel free to post here or email me separately
Scott@personalmbacoach.com