If you were having trouble paying the loan, for future reference you should have contacted the lender and made either arrangements for a lower payment or a forbearance until you had sufficient resources to make your payments.
For a governmental job, yes you there is the possibility that you could lose your job offer for two reasons 1. you didn't tell the truth on your application about being in default (depending on the conditions of your loan agreement 90 days may be considered delinquent bot default, read your loan documents) and if you are in default, 2. the default is on a federal student loan. You need to call the lender first thing Monday morning and make sure you take name/id# when you make your payment arrangements. Forbearance can be backdated to an extent to bring your account current.
For future reference, if your loan is in fact in default you would also have to be concerned about potential wage garnishment, garnishment of any federal or state tax refund, and the potential to have your nursing license suspended and/or revoked (if not licensed already, being ineligible for a professional license).
Going forward be proactive, unlike other bills, there are multiple ways to make arrangements for federal student loans (not so much for private student loans) so that you do not become in default including deferments (including deferments for periods of unemployment, underemployment, and/or receiving public assistance), forbearance (even if your interest is added to your principal thus increasing the amount you owe overall it's better than wage and refund garnishment and risking your professional license), graduated payment plans or temporary reduction in monthly payment. But you MUST contact the lender so that they can work with you, ignoring the phone calls, emails, and letters does no one any good. It's hard to ask for help, but they cannot help unless you contact them.