After being kicked off his courses due to lack of effort, Chad re-located to Chester where he worked as bar manager at the Fat Cat pub on Watergate Street and met Stove King and Paul Draper, with whom he formed Mansun. Whilst in Mansun, Chad worked as an arranger and songwriter, and co-wrote several of Mansun's songs with Draper as well as writing and performing a number of B-sides himself. Chad also took lead vocals on some of Mansun's songs, such as "Golden Stone", a B-side to "I Can Only Disappoint U" and a live cover of the Magazine single "Shot by Both Sides".
Prior to the release of the band's third album Little Kix, the band claimed that Chad had been working on a soloalbum entitled "Parrot" with Draper producing and that it would be released sometime following the release of the album in 2000, and that tracks such as "A New Melody" and "It's a Parrot" had been completed. As of 2013, the album has never materialised, however an instrumental extract appeared on Kleptomania. There were plans for the rest of the "Parrot" sessions to be released within the next two years. After nearly eight years together, Mansun broke up in 2003 whilst working on their fourth studio album.
List of Mansun songs composed by Dominic Chad