His name is credited on several records from that period including Darkthrone - A Blaze in the Northern Sky, Autopsy - Mental Funeral, My Dying Bride - As the Flower Withers and Turn Loose the Swans.

He also worked with Vital Remains, Pitchshifter, Therion, Anathema, G.G.F.H., Kong, Paradise Lost, Banished, Pentagram, Ship of Fools, and At the Gates (first three albums).

He stayed with Anathema until 2001, appearing on two albums – Judgement (1999) and A Fine Day to Exit (2001) – after which he sessioned and later joined Cradle of Filth, often operating under the stage name Herr Pubis, following the departure of bassist Robin "Graves" Eaglestone.

Pybus launched his own monthly podcast Life Is a Hideous Thing in December 2014, running for 16 episodes, including four commissioned by Peaceville Records, and featuring guests such as Pat Mills, Dave McKean, Doug Bradley, among others.

Pybus played bass on one track for My Black Omen, a multinational death metal project featuring Kam Lee (Mantas, Massacre) on vocals, Ross Feratu (The Spook, Gorthaur's Wrath, Ramonstars) on guitar and Brian Forman (Unburied) on drums.