He studied philosophy in Lisbon university.
Except for Moonspell, he formed a side project called Daemonarch in 1998, along with other members of Moonspell, for one sole album "Hermeticum",the lyrics of which derive from poetry written by Ribeiro between the ages 14 and 16. Additionally, he cooperated with Euthemia for a limited to 666 copies LP, the Apocalypse Canceled, as a memorial to Anton Szandor La Vey, in 2008. Lately,he is involved in a project founded by Nuno Gonçalves, with co-participation of Paulo Praça and Sónia Tavares, called Amália Hoje. The project was formed in 2009 to honour the famous Portuguese fado singer Amália Rodrigues. He also participates in the song "Anjo Exilado" of the album "Álbum Negro", of the band Bizarra Locomotiva.
Apart from being a musician, he has been involved in literature, having already written three poetry books in Portuguese Como Escavar um Abismo (2001), As Feridas Essenciais (2004), Diálogo de Vultos (2007). He is also responsible for the introductions of Os Melhores Contos de Howard Phillips Lovecraft and the translation in Portuguese of the biography of BD Lovecraft. He holds a monthly column in the metal magazine LOUD!, entitled "the eternal spectator"