Law firm
4sight legal is your Swiss boutique law firm in the center of Zurich. We offer companies, private individuals and public authorities specialized advice in all our core areas. Our partners are experienced lawyers who are recognized in their core competencies and strive to achieve the desired result in an effective and efficient manner. The expertise of our partners is based on many years of experience as lawyers, in-house counsel or administrative lawyers.
In addition to our advisory and litigation activities, we lecture at various universities, give talks and regularly publish in specialist journals. As a result of our activities, we have a broad national and international network.
Our modern structures and technical agility enable us to work cost-effectively. We pass this advantage on directly to our clients. We look forward to supporting you as a reliable and forward-looking partner.
Team
Manuel Bertschi
Attorney at law, LL.M.
Ronald Kessler
Attorney at law, MBA
Fabio Zanchi
Attorney at law, MLaw
Manuela Schaffner
Attorney at law, MLaw

Manuel Bertschi
Partner
Attorney at law, MLaw, LL.M.
Fields of activity
- Media and communications law
- Protection of privacy
- Social media, rating platforms and search engines
- Intellectual property, technology and competition law
- E-Commerce
- Data protection
- Labor law
- Sports law
- Foundation and association law
- Contract law
- Process management
Professional experience
| 2025: | Partner at 4sight legal, Zurich |
| 2023-2024: | Partner at Zulauf Partner, Zurich |
| 2021-2023: | Senior Associate at Zulauf Partner, Zurich |
| 2019-2021: | Associate at Kellerhals Carrard, Basel |
| 2017-2019: | Media lawyer at the Federal Office of Communications (OFCOM), Biel |
| 2016-2019: | Co-Managing Director at Fairmedia, Basel |
| 2014-2015: | Junior Associate at Lenz & Staehelin, Zurich |
| 2014: | Traineeship at the Civil District Court West, Arlesheim |
| 2013-2014: | Traineeship at the Federal Office of Communications (OFCOM), Biel |
| 2008-2013: | Journalist at the Basler Zeitung, Basel |
Education
| 2017: | LL.M., Boston University (USA) |
| 2017 | Admission to the bar, Canton of Basel-Landschaft |
| 2014 | MLaw, University of Basel and Boston University (USA) |
| 2012 | BLaw, University of Basel |
Languages
- German
- English
- French
- Italian
Memberships
- Swiss Bar Association (SAV)
- Zurich Bar Association (ZAV)

Ronald Kessler
Partner
Attorney at law, lic. iur., MBA
Fields of activity
- Commercial and corporate law
- Contract law
- Aviation law and aircraft financing
- Financing
- Money laundering
- Data protection
- Real estate law
- Labor law
- Inheritance law, estate and asset planning
- Insolvency law and restructuring
- Litigation and arbitration
Professional experience
| 2025: | Partner at 4sight legal Zurich |
| 2009-2024: | Partner at Zulauf Partner, Zurich |
| 2007-2009: | Legal Director/Member of the Executive Board at GE Capital Switzerland AG (subsidiary of General Electric) |
| 2004-2006: | Attorney at law in a medium-sized commercial law firm in Zurich |
| 2002-2003: | Trainee in a medium-sized commercial law firm in Zurich |
Education
| 2007 | MBA, University of Edinburgh Management School |
| 2005 | Sommelier ASSP |
| 2004 | Admitted to the bar, Canton of Zurich |
| 2001 | lic. iur., University of Zurich |
Languages
- German
- English
- French
- Italian
Memberships
- Swiss Bar Association (SAV)
- Zurich Bar Association (ZAV)

Fabio Zanchi
Partner
Attorney at law, MLaw
Fields of activity
- Private and public employment law (incl. aspects of unemployment insurance and daily allowance insurance)
- Contract law
- Private insurance law
- Process management
Professional experience
| 2025: | Partner at 4sight legal Zurich |
| 2021-2025: | Attorney at law and know-how manager at a leading legal protection insurance company in Zurich |
| 2017-2019: | Lawyer at a leading legal protection insurance company in Zurich |
| Since 2017: | Lecturer for legal studies in adult education |
| 2017: | Auditorate at the Justice Department of the Canton of Zurich |
| 2015-2016: | Auditor at the District Court of Zurich |
Education
| 2023: | CAS Labor Law, Zurich University of Applied Sciences |
| 2020: | Admission to the bar, Canton of Zurich |
| 2015: | MLaw, University of Zurich |
| 2013: | BLaw, University of Zurich |
Languages
- German
- English
Memberships
- Swiss Bar Association (SAV)
- Zurich Bar Association (ZAV)

Manuela Schaffner
Associate
Attorney at law, MLaw
Fields of activity
- Media and communications law
- Protection of privacy
- Social media, rating platforms and search engines
- Contract law
- E-Commerce
- Labor law
- Foundation and association law
- Process management
Professional experience
| 2025: | Associate at 4sight legal, Zurich |
| 09/2024-12/2024: | Attorney at law with Dextra Rechtsschutz AG, Zurich |
| 05/2023-08/2023: | Traineeship at the Criminal Court of Basel-Stadt, Basel |
| 04/2022-04/2023: | Junior Associate at Bär & Karrer AG, Zurich |
| 10/2021-03/2022: | Traineeship at the Civil District Court of Basel-Landschaft, Sissach |
| 01/2020-04/2020: | Short Intern at Walder Wyss AG and Baker McKenzie, Zurich |
| 2016-2021: | Paralegal at Advokatur & Mediation Butz, Corvini, Siegel, Allschwil |
Education
| 2024 | Admission to the bar, Canton of Basel-Landschaft |
| 2021 | MLaw, University of Basel |
| 2019 | BLaw, University of Basel |
| 2015-2020 | Competitive athlete in athletics (800m) |
Languages
- German
- English
- Spanish
Memberships
- Swiss Bar Association (SAV)
- Zurich Bar Association (ZAV)
Expertise
Business
- Commercial and corporate law
- Aviation law and aircraft financing
- Contract law
- E-Commerce
- Financing
- Private and public employment law (incl. aspects of unemployment insurance and daily allowance insurance)
- Private insurance law
- Money laundering
- Real estate law
- Inheritance law, estate and asset planning
- Insolvency law and restructuring
- Foundation law
- Association law
- Sports law
- Litigation and arbitration
Media
- Media and communications law
- Protection of privacy
- Social media, rating platforms and search engines
- Copyright
- Data protection law
- ICT law
- Unfair competition
Latest news
Contact us
4sight legal
Werkgasse 5
8008 Zurich