While studying graphic design and audiovisual communication at Wrexham School of Art, Valentin’s primary expressive focus was the composition of dithyrambic poetry and experimental soundscapes which he combined with stage visuals to deliver 'angry young man' performances on the new-wave circuit. In his final year he dropped out to tour with proto-goth arts alliance Laughter In The Garden and shortly after, with support from the Freedom To Party campaign, he established his first commercial studio, producing graphics and merchandise for clubs and raves under the aegis Paint It Red.
In 1988 he moved to London, working first as a costumier for the BBC before landing internships with two of the capital’s brightest PR gurus where he developed his role as a freelance art director, styling media and events for the indie music, fashion and press industries. Over time however, his desire to pursue a more personal form of creativity returned and by 1995, following a period of experimentation and time spent in Russia with members of the Neo-Academism movement, his crossover to fine art was finally cemented. Since then he has acted almost exclusively as his own impresario, staging annual solo shows and projects in a variety of traditional galleries and alternative spaces.
Although oil paint emerged as his primary medium, he never entirely abandoned his interest in the expressive potential of other mediums, and he continues to evolve an extensive body of work that includes sculpture, film, music, photography and the written word. In 2010 he established Irisbranca Media, an initiative based in Lisbon which acted in part as a collaborative and commercial exercise, and in part as a vehicle in which he could further explore his own personal artistic agenda. This led to his reengagement with performance through various theatres and independent filmmakers, designing sets and costume, directing, producing, scripting, composing soundtracks and styling publicity. As a result of his experience he was invited on a programme to mentor graduate students in cinematography at Lusófona University, and arts postgraduates at the Universidad de Bellas Artes.
In 2017, thirty years after leaving his native Wales, fifteen of which were spent living in London and fifteen spent living in France, Spain and Portugal, he returned. His practice as a fine artist continues, as does his relationship with stage and screen. In 2018 he was instrumental in developing a filmmaking programme for Theatr Gwaun, and is the co-founder of the experimental arts club, Creatura.