Ina Pottillius studied law at Vrije Universiteit Brussel (VUB) and was a lawyer at the Brussels Bar from 2002 to 2021, where she initially handled mainly cases involving liability law, contract law, insurance law and administrative law.

From 2011, Ms Pottillius worked in cassation cases for the late Michel Mahieu, lawyer at the Court of Cassation, former President of the Cassation Bar, and from 2013 to 2021 for Huguette Geinger (Bützler & Geinger), lawyer at the Court of Cassation, former President of the Cassation Bar.

In 2015, Ms Pottillius obtained the certificate of professional training 2011-2015 of the Bar at the Court of Cassation and passed the examination referred to in Article 478(2) of the Judicial Code.

In September 2023, Ms Pottillius joined STUDIO | PENALE Criminal Lawyers, headed by Mr Christian Clement.

She is a member of the Dutch Bar Association at the Brussels Bar.

Ms Pottillius mainly handles Dutch-language cases, but has a good command of French and English.