Since this is a topic that comes up a fair amount, I thought that responding would hopefully help someone even though the post is a bit old. Upon reading the post a couple things came to mind.

1) Having four years of work experience is good, and around the average, but doesn't really say much in the end. What matters is the impact that you have in your work place and community. Thus, even with what you've stated, it's hard to say how attractive your profile is because we don't really know enough about your accomplishments.

2) In the seven years that I've been helping students get into top schools, I've never seen someone get a scholarship and have a 600 on the GMAT. In fact, just the chances of getting into a top school go down drastically if you don't have at least a 650. Even though there really isn't much of a difference between someone who scores a 640 and a 650 in terms of ability, there is a big difference in the acceptance rate.

3) In this situation, it would almost surely be best to re-take the GMAT. Furthermore, the GMAT usually only keeps you out of a school. The essays, CV, and recommendations get you in. Thus, it is important to spend enough time effort on these areas as well. Many students focus so much on the GMAT that they don't leave enough time for the rest of the application.

Since this is a topic that comes up a fair amount, I thought that responding would hopefully help someone even though the post is a bit old. Upon reading your statements a couple things came to mind.

1) Having four years of work experience is good, and around the average, but doesn't really say much in the end. What matters is the impact that you have in your work place and community. Thus, even with what you've stated, it's hard to say how attractive your profile is because we don't really know enough about your accomplishments.

2) In the seven years that I've been helping students get into top schools, I've never seen someone get a scholarship and have a 600 on the GMAT. In fact, just the chances of getting into a top school go down drastically if you don't have at least a 650. Even though there really isn't much of a difference between someone who scores a 640 and a 650 in terms of ability, there is a big difference in the acceptance rate.

3) In this situation, it would almost surely be best to re-take the GMAT. Furthermore, the GMAT usually only keeps you out of a school. The essays, CV, and recommendations get you in. Thus, it is important to spend enough time effort on these areas as well. Many students focus so much on the GMAT that they don't leave enough time for the rest of the application.