Castell's recording career spans nearly three decades; his work with many major record labels and independent labels alike includes both platinum-selling national recording artists and unsigned regional acts, and a wide range of musical genres.

In spring 2008, Castell began production of the Toadies’ album No Deliverance, which was released on August 19th, 2008, on Kirtland Records.

After two years of collaboration with DFW-based electronic band Shock of Pleasure, their first full-length album Its About Time, was released on September 16th, 2008, by Universal Music Group, produced by David Castell.

Blue October's two disc set, Foiled For The Last Time, features a re-release of "Calling You", also produced by David Castell.

Castell has also been named as the producer of Blue October's forthcoming 7th studio album Sway.