If you are a currently licensed well driller in any state, I recommend that you keep it current and active even if you retire. You may be able to contract as the licensed driller for a company or unlicensed driller until he/she/they can get licensed. I am a licensed well drilling contractor in Arizona, North Carolina and Virginia, even though I haven’t physically operated a drill in several years.
Many states require that anyone (other than the property owner) must have a water well provider (WWP) designation on their license to remove the well cap.