Unless you’ve been a Federal government employee before, you probably don’t know what GS-level you will qualify for. The HR folks will use your Federal resume to determine if you are qualified. The more information you have in your resume in terms of details about what you did, how you did it and for whom, the better you will fare in the process. he HR folks also look at salary, but it is not the sole determinant. They want to make sure you are in the ballpark. They fully understand that some jobs, some professions, some sectors pay more, pay less, etc. but they are looking to see if you are within an acceptable range. If you are transitioning from a military position, they will take your rank into account as well.