A success story
since 1946.

1946 — 1976
In 1946 Jakob Aeberli wrote the first chapter: he founded Aeberli Treuhand. In 1976 he changed the legal form of his company from a sole proprietorship to a joint stock company, which was then managed by three generations until 2019 – most recently by Max Baumann, Ulrich Linder and Mario Rissi. Today, Aeberli serves clients from all industries, from individuals and small businesses to SMEs and major international corporations.
– since 1946
–
Testimonies of a success story
A new generation
with passion.

2019 — 2020

In 2019 the fourth generation took over the reins. Full of commitment and dedication, Christian Nussbaumer, Feri Cilurzo and Benjamin Block are now managing the company.  

header-slide-3.jpg
Strong together
–
Giving trust
Welcome to the
team of doers.
Qualified and committed employees are our most important asset. Our professionalism commits us to the highest standards of expertise and personal excellence. That's why you will always have an experienced partner at your side and, over time, a trusted confidant. We all form a team which is only satisfied with its work when you are.
Areas of expertise
Classic Fiduciary Services
Accounting according to CO
Accounting according to Swiss GAAP FER and IFRS
Payroll Serivces and Social Insurances
Tax expertise natural persons
Tax expertise legal persons
Real Estate Accounting and Administration
Digitization and Process Optimization
Natinoal and Internatinoal VAT
Inheritance, Marriage and Divorce Topics
Restructuring and Reorganization of Companies
Money Laundering Act
Audit
Abacus consulting
Artificial intelligence
Internal Services (they keep your backs free)
Function
Partner
Management Board
Team Leader
Location
All locations
Zurich
Zug
Lucerne
Horgen
Mirko Agustoni

Mirko Agustoni

lic. iur., LL.M. Swiss and international Taxation
+
Christian Alder

Christian Alder

Fiduciary Administrator
+
Chantal Amsler

Chantal Amsler

IT & Systems Administrator
+
Samela Baschera

Samela Baschera

Payroll HR, Abacus Consultant
+
Cyril Berger

Cyril Berger

lic. Iur., Legal Counsel
+
Benjamin Block

Benjamin Block

Swiss Certified Accountant, Co-Head of Audit,
Partner
+
Isabelle Block

Isabelle Block

BSc in Media- and communicationsmanagement, Social Media Manager
+
Mario Brändle

Mario Brändle

Swiss Certified Accountant, Certified Fiduciary Expert, Co-Head of Audit
+
Noemi Buchs

Noemi Buchs

Apprentice
+
Michel Carli

Michel Carli

Certified Fiduciary Expert
+
Feri Cilurzo

Feri Cilurzo

Certified Fiduciary Expert,
Partner
+
Adrian Cilurzo

Adrian Cilurzo

Chartered Expert in Financial and Managerial Accounting and Reporting

+
Susanne Cilurzo

Susanne Cilurzo

Marketing
+
Amel Cizmic

Amel Cizmic

Fiduciary Administrator
+
Stefan Djukic

Stefan Djukic

Chartered Expert in Financial and Managerial Accounting and Reporting,
Partner, CFO
+
Loris Eberhard

Loris Eberhard

Fiduciary Administrator
+
Mike  Eichmüller

Mike Eichmüller

Certified Fiduciary
+
Nikolas Ettling

Nikolas Ettling

Swiss Certified Accountant
+
Marco Fernandes

Marco Fernandes

IT & System Administrator
+
Ping Gao

Ping Gao

Chartered Specialist in Accounting and Financial Management
+
Annamaria Gasic

Annamaria Gasic

Chartered Specialist in Accounting and Financial Management
+
Sandro Geiger

Sandro Geiger

Chartered Specialist in Accounting and Financial Management
+
Petra  Gössi

Petra Gössi

lic. iur. MAS Economic Crime Investigation, EMBA HSG, External Consultant
+
Daniela Grieser

Daniela Grieser

Secretariat
+
Merun Gugelmann

Merun Gugelmann

AI & Automation
+
Peggy  Hertach

Peggy Hertach

Secretariat
+
Luca Holer

Luca Holer

Abacus Consultant
+
Julia Holzschuh

Julia Holzschuh

Tax Advisor (Germany), Certified Fiduciary Expert
+
Felix Huber

Felix Huber

Accountant
+
Janine Kamp

Janine Kamp

B.Sc. RWTH in Business Administration, Certified Fiduciary Expert
+
Alba   Kasumi

Alba Kasumi

Chartered Specialist in Accounting and Financial Management
+
Sidney Keinersdorfer

Sidney Keinersdorfer

Head of Property and Concierge Services
+
Harald Kilchmann

Harald Kilchmann

Chartered Expert in Financial and Managerial Accounting and Reporting, Certified Business Economist FH
+
Sabrina Kuchen

Sabrina Kuchen

Fiduciary Administrator
+
Sonja Kunarathinam

Sonja Kunarathinam

Certified Fiduciary
+
Uli Linder

Uli Linder

Swiss Certified Accountant, Member of the Board of Directors
+
Frank-Elmar  Linxweiler

Frank-Elmar Linxweiler

Certified economist, lic.oec.HSG
+
Christoph Locher

Christoph Locher

Swiss Certified Accountant in IFRS, Consolidation and IPOs, Counsel
+
Hans Mettler

Hans Mettler

BSc in Business Administration
+
Joséphine Michel

Joséphine Michel

Audit Assistant
+
Yvonne Müller

Yvonne Müller

Certified Fiduciary Expert
+
Christian Nussbaumer

Christian Nussbaumer

Certified Fiduciary Expert,
Partner
+
Vincenzo Pizzo

Vincenzo Pizzo

Swiss Certified Accountant, Counsel
+
Nick Pletscher

Nick Pletscher

Business Analyst, Abacus Berater
+
Nicole Reuteler

Nicole Reuteler

Certified HR Specialist
+
Thomas Reuteler

Thomas Reuteler

Chartered Expert in Financial and Managerial Accounting and Reporting
+
Mario Rissi

Mario Rissi

Swiss Certified Accountant
+
Maja Rumberger

Maja Rumberger

Fiduciary Administrator
+
Manuela Ruoss

Manuela Ruoss

Chartered Specialist in Accounting and Financial Management
+
Kofand Saadi

Kofand Saadi

Fiduciary Administrator
+
Fabienne  Schillinger

Fabienne Schillinger

Fiduciary Administrator
+
Michael Schmid

Michael Schmid

Apprentice
+
Janine     Schumacher

Janine Schumacher

Certified HR Specialist, Vocational Trainer
+
Fabio  Segat

Fabio Segat

Executive M.B.L.-HSG, Consulent, Lawyer
+
Murat Sejfedinov

Murat Sejfedinov

Chartered Expert in Financial and Managerial Accounting and Reporting, Counsel
+
Jürg Siegfried

Jürg Siegfried

BSc in Business Administration
+
Rémy  Sommerhalder

Rémy Sommerhalder

Certified Fiduciary Expert
+
Jeremy Sprecher

Jeremy Sprecher

Certified Fiduciary Expert, M.A. (UAS) in Fiduciary Services, Business Economist ZFH
+
Gerhard Stäheli

Gerhard Stäheli

Swiss Certified Accountant
+
Micha Steiner

Micha Steiner

Swiss Certified Accountant, M.A. HSG Accounting & Finance
+
Yasmin Studer

Yasmin Studer

Certified Fiduciary
+
Franziska Suter

Franziska Suter

Head of internal Services & Office Administration, Vocational Trainers
+
Olivia Vollenweider

Olivia Vollenweider

Certified Fiduciary Expert, Executive Management, Head of Fiduciary
+
Sara  von Felten

Sara von Felten

Fiduciary Administrator, Abacus Consultant, Vocational Trainer
+
Niccolò von Grebmer

Niccolò von Grebmer

Head of Real Estate and Concierge Service
+
Markus Wandeler

Markus Wandeler

Accounting and Tax Advisor, Counsel
+
Martin Welser

Martin Welser

Consultant
+
Roman Wey

Roman Wey

Lead Aeberli Digital, Abacus Implementation Specialist, Abacus Consultant, Head of IT
Partner
+
Annina Widmer

Annina Widmer

Certified Fiduciary, Social Insurance Specialist, Vocational Trainer
+
Marius Willi

Marius Willi

Executive Master in Business Administration, Advanced Federal Diploma of Higher Education in Business Administration
+
Petra Wirth

Petra Wirth

Business Manager, BA in Business Administration
+
Lisbeth Zangger

Lisbeth Zangger

Chartered Specialist in Accounting and Financial Management, Abacus Consultant
+
Céline Zobrist

Céline Zobrist

Certified Fiduciary, Abacus Consultant
+
Christine Zürcher

Christine Zürcher

Certified Fiduciary
+

 

 

Strong together.
Network
–
TREUHAND|SUISSE
The 12 regional sections of Swiss Fiduciary Association TREUHAND|SUISSE cover the whole of Switzerland and have over 2,100 individual and corporate members. This allows the association to use its weight and professional structures to promote the interests of its members and the industry.
For fiduciary companies with high quality standards, membership of TREUHAND|SUISSE has established itself as a standard over the years. TREUHAND|SUISSE brings together fiduciary experts who work primarily for SMEs and private individuals. The majority of them come from owner- or partner-operated fiduciary companies. In total, the company members affiliated to TREUHAND|SUISSE employ 10,000 staff, including 750 apprentices. The members of TREUHAND|SUISSE serve over 350,000 SMEs and private individuals. With our Chairman of the Board of Directors, Christian Nussbaumer, we at Aeberli also have the Chairman of the Zurich section of TREUHAND|SUISSE on board and are therefore always at the pulse of the latest developments in the industry.

Visit website
–
AGN International
With AGN International we belong to a prestigious international association and therefore have access to the know-how of 183 consulting offices in 86 countries. Thus, we have the opportunity to approach international tax issues as well as extensive corporate audits in cooperation with our partners. The association character does not only exist on paper, but we are in regular, close contact with our partners and come together several times a year for meetings and professional exchanges. Therefore, we know the faces of our partners personally and can guarantee the highest quality of service.

Visit website
–
EXPERTsuisse
EXPERTsuisse, the expert association for auditing, taxes and fiduciary, has been training, supporting and representing Certified Experts for over 90 years. The association counts 9,000 natural persons from the fields of auditing as well as business and tax consultancy among its members. In addition to the large auditing companies, its members include around 800 medium-sized and smaller fiduciary companies.
EXPERTsuisse - like TREUHAND|SUISSE - forms a nationwide network of professionals who exchange and support each other through the common platforms, further training and working aids. Membership of these professional associations is also conditional on regular and specific further training for members, which commits us to the highest quality.

Visit website
–
Apprenticeship
The label for training companies was first introduced in French-speaking Switzerland in 1997. In 2004, the State Secretariat for Education, Research and Innovation SERI, in cooperation with the cantons, finally launched the project nationally. The label is a recognition and a thank you to the training companies for their commitment to vocational training. It is intended to show our clients: We provide training and thus make our contribution to Switzerland as a location for education.

Visit website
What can we do for you?
Call us, we are here for you.
2026 - update browser