A lot of companies won't hire you if you have a criminal record of any kind. Some won't even hire you if you have any record of arrest, regardless of conviction.
Which fraternity?
Which fraternity?
No, it is not, because background check and other third-party intelligence firms aren't purely reactive now, they have and use tools to proactively vacuum up public records and maintain their own DBs. After-the-fact sealing of arrest records or expunging of convictions has no effect on data that is already in third-party hands.