He founded Marek Lieberberg Concert Agency (MLK) in 1987, Germany's leading live music promoter.

Lieberberg is the chief executive officer of Live Nation Concerts Germany and holds the same position for Switzerland and Austria.

Marek Lieberberg, the child of Jewish Shoah survivors, was born in 1946 in the Zeilsheim displaced persons (DP) camp.

After obtaining the appropriate license from the American occupation authorities, his father produced chocolate and also ran a coffee roasting business.

[4] His parents' ethnic identity was intentionally indistinguishable in their lives, so they enrolled him in a boarding school in England to learn more about Jewish history.

[5] Lieberberg studied sociology at the University of Frankfurt for a year, where he became involved in left-wing political circles, a characteristic trait of young Jews in the 1960s and 1970s.

An individual asked him for help promoting artists such as Eric Clapton and Wilson Pickett, putting up posters for concerts in town, managing tickets and setting up the equipment.

He began his promoter activities by driving his old Volkswagen (VW) car in front of the Who's bus to secure the band's arrival times in each city.

[2] In 1985, Lieberberg wanted to bring to the German region of the Palatinate (Pfalz) the atmosphere that reigned in the American town of Bethel during the first Woodstock festival.

[11] Lieberberg won Tour Promoter of the Year 2007 at the annual Live Entertainment Award (LEA) [de], held at the Color Line Arena in Hamburg.

The previous year, he presented artists such as Coldplay, Depeche Mode, Green Day, Linkin Park, U2, and Xavier Naidoo through his agency, MLK.

[16] In 2011, Lieberberg received a Live Entertainment Award in Frankfurt "in recognition of his safety record over the last 25 years of promoting the Rock am Ring concert".

[10] In mid-2015, Lieberberg was appointed chief executive officer (CEO) of the newly created Live Nation Concerts Germany.

According to Feldmann, this distinction was awarded to him for his "commitment to rock and pop music", emphasising that he advocated philanthropy and took a stand against xenophobia and racism.

[24][25] Also, in April 2024, he was included in Billboard's International Power Players list in the Live category for "executives who are driving success outside the United States" and have "contributed to a ninth consecutive year of growth for the global recorded-music business".

In 1998, it was reported that the couple lived on Maui for four months a year and had long visited the island in the Hawaiian archipelago.

[5] From 1964 to 1967, he played in the Rangers band alongside Ludwig Ickert, Robert Wolf, Jürgen Kessner, and Axel Schürmann.