He also appeared in the band Agressor in 1982 and joined the Eindhoven-based metal band Elegy in 1987. Warby moved to Gorefest in 1992, where he replaced the former drummer just before the recording sessions of "False", he had to learn all themes and develop his work in just two weeks, which he managed to achieve in a matter so fast that producer Colin Richardson nicknamed him Fast Eddy. After Gorefest split up in 1999, he took part in the re-united Gorefest in 2004.
He helped the Dutch pop band Krezip during the recordings of "Days Like This" in 2002. He also helped German band Love Like Blood with three songs of their album "Snakekiller", in 1998. In 2005 he played live with the Dutch gothic metal band After Forever while their actual drummer André Borgman was recovering from cancer.[1]
In 2008, Warby began a doom metal project named The 11th Hour, and released the album The Burden of Grief in 2009.[2] All guitars, bass, drums, keyboards and clean vocals are performed by Warby, with the additional growls contributed by Rogga Johansson (Ribspreader). The Burden of Grief is a concept album, "about a man about to die from a lung disease."[3]