Wyssmann Zigerli & Keusen is a Swiss law firm focused on liability and insurance matters. Led by Olivier Zigerli, a Fachanwalt SAV Haftpflicht- und Versicherungsrecht, the practice handles personal injury claims, liability disputes, and complex insurance issues for individuals and organizations. The firm draws on decades of experience across Bern, Biel and Thun and is recognized for its specialist expertise in personal injury and liability law.

Clients value a client centered approach with practical case assessment, clear communication, and direct access to senior attorneys. The team supports accident victims and insured parties with practical strategies, negotiations with insurers, and, when necessary, effective litigation in liability and insurance disputes. The firm participates in victim support initiatives and professional associations such as UP, Beobachter-Anwaltsnetz, and the SAV Haftpflicht- und Versicherungsrecht group to provide informed guidance and robust representation.

Offices in Bern Theaterplatz 8, 3011 Bern; Biel Bahnhofstrasse 1, 2502 Biel; and Thun Marktgasse 12, 3600 Thun enable the firm to serve clients across the Bernese region. The practice combines advisory and litigation services to pursue timely, fair resolutions and to support clients from initial consultation through to final resolution.

About Olivier Zigerli, spezialisierter Anwalt im Haftpflichtrecht
Practice areas
Accidents & Injuries
Insurance
Lawsuits & Disputes

Languages spoken
English

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Practice areas

Accidents & Injuries

Wyssmann Zigerli & Keusen provides expert guidance to accident victims on liability and compensation issues, including assessing liability, calculating damages, and securing medical and other recoveries. The firm coordinates with insurers, medical professionals, and regulatory bodies to advance claims efficiently and, when needed, pursues litigation to obtain fair settlements or court judgments.
Animal & Dog Injury
Assault & Battery
Birth Injury
Brain Injury
Car Accident
Construction Accident
Dangerous Product
Defamation
Drugs & Medical Devices
Medical Malpractice
Motor Vehicle Defect
Motorcycle Accident
Personal Injury
Premises Liability
Property Damage
Sexual Abuse
Toxic Mold
Toxic Tort
Travel Accident
Truck Accident
Work Injury
Workers Compensation
Wrongful Death

Insurance

The firm advises insured individuals and organizations on insurance disputes under liability and general insurance law, including coverage interpretation, dispute resolution, and claims handling. It supports clients through negotiations with insurers and, if necessary, litigation to enforce or defend policy rights.
Bad Faith Insurance
Health insurance
Insurance Defense
Insurance Fraud
Life Insurance
Marine Insurance
Property Insurance
Reinsurance

Lawsuits & Disputes

Wyssmann Zigerli & Keusen handles complex dispute resolution and litigation arising from liability and insurance matters, offering strategic case development, evidence gathering, and courtroom advocacy across cantons. The team emphasizes efficient resolution, meticulous preparation, and transparent communication with clients throughout proceedings.
ADR Mediation & Arbitration
Appeal
Class Action
General Litigation
Ethics and Professional Responsibility
Commercial Litigation
Antitrust Litigation
Restructuring & Insolvency

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