Mikolaj is an expert in music, art and entertainment promotion. He is the founder of Alter Art agency, one of Poland’s leading promotion companies organizing the most important music festivals in Poland: Orange Warsaw Festival, Kraków Live Festival and Open’er Festival. Open’er Festival is a four-day event featuring world’s biggest artists and representing a variety of genres on its five stages. The festival has also been acknowledged outside Poland, becoming a two-time European Festival Awards winner in the Best Major Festival category. Mikolaj Ziolkowski was named one of the 100 Most Influential People in Poland. Since 2016 he is board member of Yourope, the European Festival Association founded in 1998.