When you leave your job, you have several options on what you can do with your retirement plan at your former employer.
Depending on the rules to your employer's plan, you may be able to rollover your retirement plan to a new employer’s plan (make sure to check that your current employer’s plan allows you to make a rollover from another plan), rollover your retirement plan to an individual retirement account (IRA), cash out your retirement plan, or leave your retirement plan (if under$5,000, the former employer may not allow this option).
With all options, there may be fees or tax implications that apply. Please make sure to speak with a Tax Consultant for your individual tax situation.