I will be leaving my job after 17years. I have a retirement fund and also was investing part of my salary.?

How do I go about rolling over these funds?

Roll these funds into a privately held IRA. Virtually every bank and financial institution offers rollover IRAs. You'll pay a severe penalty for taking control of these funds, even if you decide to roll them into an IRA within 60 days. So, don't take that chance. Do a rollover in which your fund never touches your hands.

you can open an IRA account with an online broker like Scottrade or Etrade, then rollover your retirement account into the new IRA.
You could also open an IRA at your bank, or with a mutual fund like Janus or Vanguard. But with the broker you can invest in stocks, bonds, CD's, and mutual funds.
If you take the funds out you have 60 days to put back into an IRA,, but way better to transfer directly from one account to the new account , that way there is no attempt by IRS to tax you.

roll it over to an ira at a no load fund company, dont roll it into a bank fund where they may charge you 5% up front loads, troweprice did mine pretty quickly, they called fidelity with me on the line and we worked it out, they sent me the check and i sent it on to troweprice

what company does your retirement fund at work? if its a company like fidelity just have them roll it to an ira with them, they are a good company, same with vanguard, tons of no load funds for you to choose from