He is co-creator of The Radio Adventures Of Dr. Floyd, which has included guests Jeffrey Tambor, June Foray (Looney Tunes), Chuck McCann (CTW's Square One TV), Frank Conniff (Mystery Science Theater 3000), Leslie Carrara-Rudolph, John Kennedy, and Elizabeth Payne (The West Wing).
He also appears on the CD of Leslie Carrara-Rudolph's alter ego Lolly.
Grant is a member of The Jim Henson Company's Puppet Up! Uncensored Improv Troupe. On September 19th, 2009, he hosted the Puppet Up! show at The Avalon in Hollywood and on December 30, 2010 he hosted the Stuffed and Unstrung show in Irvine, CA.
In 2010, he produced and provided the voice of the announcer for the Wilson & Ditch: Digging America audio podcasts.