He’s part of a music group called the Star Trek Rat Pack (songs about Trek) which features Max Grodenchik, Casey Biggs, Vaughn Armstrong, and Ethan Phillips. They perform the last night of each convention they attend.

EDIT: FYI, this show is raunchy (especially due to the jokes Ethan tells). Not to be seen with your kids.

I like how he’s credited as a character from a different series.