Does a DUI in California show on a criminal record for a job after 30 years?

No, it's gone as far as any cops can see at the time of the arrest or roadside investigation after seven years, but they'll use standard training techniques to 'fish' any information or admissions from you, so just give your name and then KEEP QUEIET! Know your rights, too - it'll help you out in any jam when it comes to the often unfair and impartial pigs we call cops. FTP!