Babis "Bob" Katsionis (Greek: Μπάμπης Κατσιώνης; born February 17, 1977 in Athens, Greece) is the rhythm guitarist and keyboard player for the heavy metal/power metal bands Firewind, Revolution Renaissance and Outloud. He is considered to be Greece's most successful rock/metal keyboard player, being the only musician ever winning the same category "Best Keyboardist" in Greek Metal Hammer's Annual Readers' Polls for 5 years in a row (2006–2011). He is founder of Progressive Vision Group, a videoclip making company, counting over 90 videos for rock/metal bands and artists since 2002.
Katsionis has appeared in various small-time bands over the years (Skyward, Retrospect etc.), most of them projects he developed himself, before gaining more recognition with the likes of Firewind and Outloud.
Bob Katsionis performing live in 2007.
He started playing keyboards when he was 10 years old and, four years later, began learning guitar. Bob cites Kevin Moore, Jens Johansson and Keith Emerson as his main keyboard influences. As well as playing keyboards, Bob is also a seven string guitar player and has played both instruments in his various bands. For instance, when Firewind play live, he performs in a dual role as keyboard player or rhythm guitarist (or both), depending on the song. He uses a standard six string guitar in these circumstances. Bob also has released three instrumental albums with his solo project resembling mostly jazzy neo-classical/progressive metal. and has also joined his idol's Timo Tolkki (ex-Stratovarius) band Revolution Renaissance for the recording of their album "Trinity" without making any live appearances. Recently he released a 4th solo album titled "Rest In Keys".