Penal Code 1203.4 indicates even if expunged, you must disclose the conviction when applying for a licensure of any agency in the state. The relevant portion reads as follows:
The order shall state, and the
probationer shall be informed, that the order DOES NOT RELIEVE HIM OR
HER OF THE OBLIGATION TO DISCLOSE THE CONVICTION in response to any
direct question contained in any questionnaire or application for
public office, for LICENSURE BY ANY STATE OR LOCAL AGENCY, or for
contracting with the California State Lottery.
Congrats on getting the conviction expunged. In addition to your requirement to disclose the previous conviction when applying for a license, you have to remember that an expungement doesn't wipe out your record, and the state agency would likely have access to it. So in order to answer truthfully and in accordance with the law, if you're asked whether you were charged with a crime, the Judicial Council of California states that you MUST answer "Yes, conviction dismissed." The Judicial Council further states "In California, government employers and licensing agencies (except for police agencies and concessionaire licensing boards), will treat you the same as if you had never been convicted of any crime." So it appears that the best course of action for you would be to follow the Judicial Council's directions. Good luck on getting your licenses!