Sivo Penev was born on 15 October 1985 in Stara Zagora, Bulgaria. He began piano lessons at 8 and took up the trumpet at 10, studying at the Hristina Morfova Secondary School of Music under Mitko Mitrev. He graduated with full honours in 2004 and was admitted to the Vienna Conservatory, where he studied with Prof. Karl Steininger of the Vienna Symphony. He won first prize at the National Competition for Young Trumpeters in Stara Zagora (1997) and at the National Wind Instrument Meetings (1999, 2000). In 2003 he won second prize and a scholarship at the "Music and Earth" International Competition in Sofia. In Vienna he won prizes and scholarships at the Fidelio Competition in 2006 and 2007, and recorded for Austrian national radio (ORF). He attended master classes with Edward Tarr, Reinhold Friedrich, Wim van Hasselt, Kristian Steenstrup and Omar Tomasoni. He also performed with the Vienna Symphony Orchestra, the Vienna Youth Philharmonic, the Vienna Sinfonietta and the Wiener Jeunesse Orchester. In 2018 he graduated with distinction, earning a master's degree from the Music and Arts Private University of the City of Vienna. Since 2019 he has played in the trumpet section of the Sofia Philharmonic, and since 2021 he has taught trumpet at the Lyubomir Pipkov National School of Music.