How to Get a Marine Biology Internship. Many marine biology jobs are competitive, so getting a marine biology internship can help give you a leg up on the competition when you're applying for your first job (or even, another internship).
This means that schools are able to be much pickier about who they accept, and that even students with high test scores are being turned down for those with average scores and more real-world experience. Very few students make it into MBA programs with less than two years work experience.
You'll be able to get an MBA in the future. In fact, assuming that you finished your undergrad at 22, you've only been in the work force 3 years. I'd say you need two more years of experience before you start applying to MBA schools.