Sonja Heinonen-Tilli


About Sonja

Sonja specializes in data protection and corporate advisory. She advises clients on a variety of data protection matters and corporate & contract law issues. In addition, she assists both domestic and international clients in various business fields in M&A, with an emphasis on data protection compliance issues and corporate & contract law.

Sonja joined Procopé & Hornborg as an Associate upon her graduation in 2021 after working at the firm as a Senior Trainee for several years. Sonja has gained experience from working in law firms and as a Secondee Data Protection Officer in a significant Finnish electricity company.


Procopé & Hornborg, Associate 2021-
Helen, Legal Counsel (secondee) 2021-2022


Master of Laws, University of Helsinki 2021
Exchange studies, Luiss Guido Carli University 2020


International Association of Young Lawyers
Lawyers Associated Worldwide
Association of Finnish Lawyers

Recent references

Working languages

  • English
  • Finnish
  • Swedish

Internationality and law in mind already in high school

“I like working at P&H because here all employees are supported in their professional development. Moreover, we have a low hierarchy and a nice work community. In addition, it is nice to notice that I am increasingly more able to help, for example, younger colleagues. I received the same kind of support here during my traineeship and have always appreciated it.”