Marek Piekarczyk is the long-time vocalist of TSA, the pioneering Polish heavy metal band. He has worked with TSA since 1981 (with breaks); he was also a member of the band Balls' Power and played the role of Jesus in a Polish production of Jesus Christ Superstar directed by Jerzy Gruza (1986). In 2009, he released the solo album Źródło, consisting of covers of Polish songs from the 1950s and 1960s. He sat on the jury of the talent show The Voice of Poland (2013–14) and also hosts the programme Buntownik z wyboru on RMF FM.