Sentinel Legal does not position itself as a generalist firm. We work exclusively in targeted areas of expertise that we master: criminal law, new technologies, business law and civil litigation, with a deep understanding of the cross-border (CH-EU), operational and economic dimensions of every mandate.
Our size is an advantage: every case is handled by a partner, never entirely delegated. You benefit from a single, experienced point of contact who understands your situation in its entirety and is fully invested in achieving a result.
Matthias Traussnig and Aurélien Rocher combine experience that is directly useful to their clients: private practice, the Public Prosecutor’s Office, the Big Four, university teaching and immersion in technology ecosystems, Legal Tech, AI, Web3. A combination that gives them pragmatism, high standards and a multidisciplinary view of the most complex situations.
We only accept mandates that correspond to our expertise. No dispersion, no compromise.
Legal. Economic. Strategic. Your interests, in their entirety.
Your reality first. Not a legal text applied to a standardized file.
A network of partners in Switzerland, Europe, and internationally, and established links with authorities and regulators.
Criminal defense, white-collar crime, protection of civil rights, negotiation, and representation — before criminal, civil, and administrative authorities.
Startups, Web3, AI, Legal Tech — fundraising, FINMA compliance, and legal challenges of digital transformation.
Entity creation, investment structuring, M&A, shareholders' agreements, recurring legal advice, risk management, commercial litigation, and arbitration.
Executives, asset managers, compliance officers — personal liability, FINMA proceedings, civil and criminal liability.
Franco-Swiss investors, holders of foreign currency loans (CHF / EUR), wealth structuring, cross-border contracts, and litigation.
Licenses, authorizations, legal opinions, compliance, and institutional litigation — an end-to-end regulatory practice.
Supporting our clients in risk management, dispute prevention, and the strategic defense of their interests.
Anticipating risks upstream, staying one step ahead, and intervening with precision when the situation demands it.


Meetings take place at the firm, in a period building on Quai Gustave-Ador, facing the Jet d’eau.