You should contact our 401k administrator and ask about your options. If your 401k is over a certain amount -- I think it's $5000 but this may be less -- you can keep your 401k money for the time being since you won't be "forced out". If this is an option for you, you might leave it in the 401k until you join a new company and then make a direct rollover to their 401k plan. That might also be simplest if you have many years until retirement. If you are in danger of "force out", our 401k plan and your CU should be able to advise you how to make a direct rollover --- emphasis here: you do not want the check to pass through your hands, it should go custodian-to-custodian.