I wish I could help you with the retirement details, but best to reach out to your HR. I know you can transfer your 401k to another IRA with your personal brokerage after separating.
Ponygirl,
yes, SheepWhisperer is correct, the retirement funds can be rolled over to another existing IRA or 401k.
Many moons ago I got thrown out of a small (dysfunctional) govt contractor company, and rolled the retirement plan funds over into another existing 401k account.
Check with the HR dept and also whoever does your taxes.
I'm sure there is someone on here that knows more than me, but I'd consult an expert before moving your 401K.
I think you said you had a decade before you could retire so it may not be relevant, but if you leave your 401K in the same plan where you are working, you can withdraw money without penalty much sooner than if you move it to another plan..
It's been a while since I studied this and things may have changed which is why I'd ask an expert first.