For over 25 years, Sophie was a lecturer in the Executive Master in Tax Management at the Solvay Brussels School, where she taught the taxation of small and medium-sized enterprises (SMEs).

Sophie has been a member of the Brussels Bar since 1989. She joined Janson as a partner on 1 July 2025.

Previously, she founded the tax and criminal law firm Hirsch & Vanhaelst (2011–2025). She was also a partner at Philippe & Partners (2007–2011) and, prior to that, at Afschrift.

Sophie specializes in tax law, which she practices in close connection with corporate and criminal law. She assists her clients in their dealings with the tax authorities, including audits and litigation, and advises companies and their directors on the tax implications of their day-to-day operations.

With over 35 years of experience, she has developed recognized expertise and is able to handle complex and technical matters with confidence.

She also has extensive experience in voluntary disclosure procedures and anti-money laundering regulations.

Sophie is a regular speaker at tax law conferences, where she shares her in-depth expertise on a broad range of tax-related topics.

• Assisting in estate distribution and inheritance planning

• Advising on the tax treatment of financial income

• Providing guidance on the application of the Cayman tax

• Assisting with voluntary tax disclosures and anti-money laundering compliance

• Supporting the structuring of real estate acquisitions

• Representing both individuals and legal entities during tax audits, including investigations by the Special Tax Inspection Unit

• Advising companies and individuals in the context of tax ruling requests

• Advising individuals and legal entities on the tax aspects of share transfers and company sales

Education :

LLM in Economic Law (Université Libre de Bruxelles, 1990) 

Master in Law (Université Libre de Bruxelles, 1989) 

Bar :

Brussels