The answer depends on what is on your record, if you get is sealed or expunged and the benefits of the sealing or expungement. Please provide more information for a more specific answer. In the meantime, here are two sections of Nevada law that would be relevant if you were wanting a job as a dealer in a Casino in Las Vegas.

Dealers in Vegas must be approved by the Nevada Gaming Commission (NGC). The NGC regulation 5.104 says a applicant can be applied if the applicant has:

(a) Has committed, attempted or conspired to commit any offense in violation of NRS 465.070 to 465.085, inclusive.
(b) Has committed, attempted or conspired to commit any offense, within the past 10 years, involving or related to gambling, which is a felony in this state or, if committed in another state, would be a felony in this state.
(c) Has committed, attempted or conspired to commit any offense involving larceny related offenses committed against a gaming establishment within the past 10 years.

Furthermore, Nevada law states:

12. The Board may suspend or object to the registration of an applicant as a gaming employee for any cause deemed reasonable by the Board. The Board may object to or suspend the registration if the applicant has:

(a) Failed to disclose or misstated information or otherwise attempted to mislead the Board with respect to any material fact contained in the application for registration as a gaming employee;

(b) Knowingly failed to comply with the provisions of this chapter or chapter 463B, 464 or 465 of NRS or the regulations of the Commission at a place of previous employment;

(c) Committed, attempted or conspired to commit any crime of moral turpitude, embezzlement or larceny or any violation of any law pertaining to gaming, or any crime which is inimical to the declared policy of this State concerning gaming;

(d) Committed, attempted or conspired to commit a crime which is a felony or gross misdemeanor in this State or an offense in another state or jurisdiction which would be a felony or gross misdemeanor if committed in this State and which relates to the applicant’s suitability or qualifications to work as a gaming employee;

It sounds like if it has been less than 10 years since you had something serious on your criminal record, you may need to wait before applying for a job in a Casino in Vegas that deals with gaming.

You still may wish to consider record sealing or expungement for other job purposes too.