He hosts the You Have Permission and Pretty Good Vibrations podcasts and previously co-hosted the Depolarize!

He formed the band Sherwood with Nate Henry in 2002 while attending university at Cal Poly in San Luis Obispo, California.

Koch was friends with Nate Henry and Chris Armstrong while they were attending college in San Luis Obispo, California.

With the band's addition of Joe Greenetz as the drummer this also inclined Dan to switch to guitar.

Koch also started a series of podcasts titled "Beards in a Band" with drummer Joe Greenetz in addition to the "Apples and Oranges" series started by lead singer and bassist Nate Henry and keyboardist Mike Leibovich.