##  [Sietse Sleypen](/en/team/sietse-sleypen) 

#  Sietse Sleypen 

About

Sietse Sleypen obtained his master's degree in Law from KU Leuven. After completing his studies, he started his career at an international consulting and accounting firm, where he gained two years of relevant work experience. Due to his keen interest in tax law, he further specialized with a master's degree in Taxation at KU Leuven, which he successfully completed. Since 2026, Sietse has been strengthening Yusto's tax team, where he focuses on corporate taxation and wealth taxation. His motivation is to provide accurate, clear, and to-the-point advice.



 

Education

- Master of Laws - KU LEUVEN
- Master in Taxation - KU LEUVEN

**Member of the Brussels Bar**



 

 

 

       ![Sietse Sleypen, team member bij Yusto](/sites/default/files/styles/50_width_in_container_max/public/2026-08/wit_20260623_142120web.jpg.webp?itok=C6hD_bxt "Sietse Sleypen, team member bij Yusto") 

 



 



 

 

## Other team members

 [All team members](/en/about-us) 



 [       ![Amber Paridaens, team member bij Yusto](/sites/default/files/styles/50_width_in_container_max/public/2026-08/wit_20260623_125620web.jpg.webp?itok=OXUToj83 "Amber Paridaens, team member bij Yusto") 

 



 

Lawyer

 

 

 

##  Amber Paridaens 

Amber Paridaens obtained her Master of Laws at the Vrije Universiteit Brussel, with a specialisation in criminal law. During her studies - and a summer internship at Yusto - she developed a broad interest in various legal fields. Today, she aims to further expand and deepen her expertise in corporate law, among others. With strong motivation and eagerness to learn, Amber takes her first professional steps at Yusto, where she applies her legal insights in practice with great enthusiasm.



 

 ](/en/team/amber-paridaens)

 

 [       ![Michaël Boudry, Partner bij Yusto](/sites/default/files/styles/50_width_in_container_max/public/2026-08/wit_20260623_153137web.jpg.webp?itok=r2xZPJau "Michaël Boudry, Partner bij Yusto") 

 



 

Partner

 

 

 

##  Michaël Boudry 

Michaël Boudry has been part of Novius, now Yusto, since 2007, becoming a partner in 2013. With an LL.M. in Corporate Law and a postgraduate degree in Entrepreneurship and Innovation, Michaël is the trusted legal advisor to numerous entrepreneurs and companies. Accessible, understanding and with in-depth expertise, he guides clients towards well-founded solutions and long-term peace of mind.



 

 ](/en/team/michael-boudry)

 

 [       ![Maxime Fierens, advocaat bij Yusto](/sites/default/files/styles/50_width_in_container_max/public/2026-08/wit_20260623_131930web.jpg.webp?itok=lw6_6YZV "Maxime Fierens, advocaat bij Yusto") 

 



 

Lawyer

 

 

 

##  Maxime Fierens 

Maxime Fierens obtained his Master of Laws from KU Leuven in 2023, with a six-month Erasmus experience in France. Since his internship at Yusto in the same year, he has immersed himself in a wide range of cases within corporate and company law. Maxime is known for his solution-oriented approach, always prioritizing the client's needs. His attention to detail and pursuit of practical solutions make him a valuable partner in guiding legal disputes and drafting contracts.



 

 ](/en/team/maxime-fierens)

 

 [       ![Toon Proost, partner bij Yusto](/sites/default/files/styles/50_width_in_container_max/public/2026-08/wit_20260623_151424web.jpg.webp?itok=j7EF_Lla "Toon Proost, partner bij Yusto") 

 



 

Partner

 

 

 

##  Toon Proost 

Toon Proost started as a trainee attorney at Novius in 2009. He learned the subtleties of insolvency law in-house, under the mentorship of Ronald Parys. In addition to being an attorney and bankruptcy trustee, Toon is a partner at Yusto and guides entrepreneurs with a 360° perspective, from start-up to estate planning. In doing so, he always seeks the most optimal economic solution, which he then legally frames. His approach is pragmatic and solution-oriented, with a strong focus on the economic interests of his clients.



 

 ](/en/team/toon-proost)

 

 

 





 

 



 

 

CTA team member

##  For those who build  
what last 

 

For entrepreneurs, family businesses and investors. People who make decisions that matter. Those who want to grow, protect, invest or transfer.



 

[Who we serve](/en/whom)

 

 

      ![Het Yusto team. De juiste knowhow, exact waar het telt. Juridisch en fiscaal advies voor ondernemers die vooruit kijken, van oprichting en groei tot investering, herstructurering en overdracht.](/sites/default/files/styles/full_width_in_container_xl/public/2026-08/teamfoto.png.webp?itok=9ldIdpcK "Het Yusto team")