Robbert-Jan Winters studied law at the University of Amsterdam and Leiden University. During his bachelor’s degree in law at the UvA, he was a student-assistant at the International Criminal Law and European Law departments. He then decided to learn more about the foundations of law at Leiden University, where he followed the master’s specialization in Encyclopedia and Philosophy of Law. In 2014 he graduated cum laude. In the following years he taught at Leiden University.

He started at VerbeekdeCaluwé on 1 January 2021 as professional support lawyer. He was officially sworn in as a lawyer on 1 September 2022 and was admitted to the bar on 29 August 2025.