Wieteke Drummen studied at the University of Amsterdam in the Netherlands, at Université Paris-Sorbonne in France, and at the University of London in England, where she specialised in national criminal law, international criminal law, and the law of criminal procedure. She completed her training as an attorney at two prestigious Dutch law firms in Maastricht and Amsterdam. Since 2009, she has been running her own practice, where she focuses on handling criminal cases throughout the Netherlands.

Wieteke Drummen is a member of the Dutch Association of Defence Counsel (NVSA), the Dutch Association of Juvenile Defence Counsel (NVJA) and the European Criminal Bar Association (ECBA). She speaks Dutch, English, French, German and Italian.