Our Team

At your service to defend your rights

Tobias Zellweger

Founding Partner, PhD
French, English, German, Swiss German

Specialisation

  • Public Law

Main Areas

  • Fundamental and political rights
  • Immigration law
  • International administrative assistance
  • Construction and environmental law, land-use planning
  • Transport law (concessions, authorisations, planning approval proceedings)
  • Healthcare law (hospital planning, tariff disputes, social insurances)
  • Public procurement law
  • Public service law
  • Litigation before administrative jurisdictions on the cantonal and the federal level
  • Contract law and civil law

Experience

Dr Tobias Zellweger advises public authorities, private companies and individuals. He regularly conducts judicial proceedings, in particular before cantonal and federal administrative jurisdictions.

Slogan

“Stay focused and open-minded.”

Full printable CV

Fabien V. Rutz

Founding Partner
French, English, Turkish

Specialisation

  • International commercial arbitration, labour law, criminal law

Main Areas

  • Swiss and transnational contract law
  • Employment and labour law
  • Criminal business law
  • Internal investigation
  • Copyright and unfair competition law
  • Commercial law
  • Succession law
  • Civil liability law

Experience

In his areas of expertise, Mr Fabien V. Rutz regularly advises and defends small and medium-sized enterprises as well as private individuals. He provides assistance to employers during internal investigations and regularly acts as counsel in judicial and arbitral proceedings.

Slogan

“Ad augusta per angusta.”

Full printable CV

Anne Roux-Fouillet

Partner, Certified Specialist SBA Labour Law
French, English

Specialisation

  • Labour law (SBA)

Main Areas

  • Employment and labour law
  • Contract law and civil law
  • Public service law
  • Internal investigation
  • Social security law
  • Civil Procedure
  • Debt collection law

Experience

Anne Roux-Fouillet’s main area of practice is employment and labour law. She advises and represents private individual as well as national and multinational companies on all employment law matters. Anne Roux-Fouillet’s practice also includes social security matters and civil litigation.
Anne Roux-Fouillet is also a Deputy Judge at the Geneva Court of justice (Geneva Court of Appeal) since May 2022.

Slogan

“For every problem, there is a solution.”

Full printable CV

Laurent Thurnherr

Associate
French, German, English

Specialisation

  • Corporate law, contract law
  • Tenancy law

Main Areas

  • Construction and real estate law
  • Administrative law
  • Traffic and criminal law
  • Insolvency matters

Experience

Mr Laurent Thurnherr regularly engages in both litigation and advisory work in the fields of tenancy law, corporate formation and restructuring, commercial disputes, as well as real estate and construction law. As a military auditor (prosecutor), he also practises criminal law. He represents and defends both businesses and private individuals in his areas of expertise, prioritising amicable settlements whenever possible over costly legal proceedings.

Slogan

“Whatever you do, do it carefully, without forgetting the goal.”

Full printable CV

Nassim Ben Brahim

Associate
French, English, Spanish

Main Areas

  • International arbitration
  • Swiss and transnational contract law
  • International sanctions
  • International private law
  • Commercial law

Experience

After obtaining his bar exam, Mr. Nassim Ben Brahim joined our team as an associate, where he offers advisory and litigation services. With an international education and experience in Geneva, Paris, and Singapore, Mr. Nassim Ben Brahim uses his skills to defend the interests of our clients.

Slogan

“When you focus on the good, the good gets better.”

Full printable CV

Nicolas Vial

Associate
French, English

Practice Areas

  • Criminal Law
  • Contract Law
  • Environmental Law
  • Labour Law
  • Administrative Law
  • Fundamental Rights
  • Tort Law

Experience

Nicolas Vial’s practice covers criminal, civil and administrative litigation. As a former employee of the Territorial Department of the canton of Geneva and holder of an LL.M. in Environmental Law and Policy from Stanford Law School, Mr. Vial has a solid background in public law. He joined Pyxis Law in 2025 after completing his traineeship at the firm Borel & Barbey in Geneva.

Motto

“L’injustice est naufrage. Le droit, le rivage.”

Full printable CV

Julien Castello

Trainee Lawyer
French, English

Main Areas

  • Contract law
  • Arbitration
  • Anti-doping law
  • Association law
  • Employment and labour law
  • Civil law
  • Personality rights

Julien Castello is a trainee lawyer with the Law Firm Pyxis Law.
Before joining the team of Pyxis Law, Julien Castello studied at the University of Geneva where he obtained a Bachelor’s degree in Law. He then completed a Master’s degree in Law with a specialization in Sports law at the University of Neuchâtel. During his Master’s degree, he also spent an academic year as an exchange student at the Universidad Pontificia Comillas in Madrid. He also holds a Certificate of advanced studies in legal professions from the University of Geneva.
Alongside his studies, Julien Castello worked as a summer intern at a local Law Firm in Geneva and a Swiss Law Firm in Tokyo (Japan). He then worked as a legal intern at the Gymnastics Ethics Foundation in Lausanne, sports body responsible for ensuring that the regulations of the Fédération Internationale de Gymnastique (FIG) are respected.
Throughout his experiences and studies, Julien Castello developed a particular interest in doping law, association law, athlete protection (Safeguarding) and internal disciplinary proceedings of sports federations.

Slogan

“Jita kyoei”

Full printable CV

Bruna Piffaretti

Trainee Lawyer
French, English, Italian, Spanish, German

Practice Areas

  • International criminal law
  • Fundamental rights
  • Migration law
  • Labour law
  • Criminal law
  • Civil law

Experience

Bruna Piffaretti is a trainee lawyer at Pyxis Law.
Before joining Pyxis Law, Bruna Piffaretti studied at the University of Fribourg, where she obtained a Bachelor’s degree in Law and a Master’s degree in Law (Magna cum laude). As part of her academic journey, she spent a semester at the Georgetown Law Center for Transnational Legal Studies at King’s College in London, United Kingdom. Alongside her studies, she gained practical experience through several internships at a law firm in Lugano, Ticino, Switzerland.
After obtaining her Master’s degree, Bruna Piffaretti furthered her training in international criminal law by obtaining an LL.M. at the University of Leiden, in the Netherlands. She then completed an internship at the International Criminal Court (ICC) in The Hague, Netherlands.
She obtained her Certificate of advanced studies in legal professions at the University of Geneva, in September 2024.
At University, she devoted a particular interest to public international law, particularly to international criminal law.

Motto

“Caminante no hay camino, se hace el camino al andar.”

Full printable CV