Having started her career as a freelance dancer and a choreographer, Petra switched to other activities in the cultural sector. Petra was production manager at Het Gasthuis (now part of Frascati), and she was in charge of finances at De Veenfabriek. Since 2016, she has been working freelance as a bookkeeper and business consultant in the cultural sector.

She is also a board member of MC31 Foundation, MCKassett and Stichting De Carvalho.