Management
Philipp Stirnemann, CEO and Co-Founder

Education:
- Master of Arts in Business Administration, University of Zurich (summa cum laude, ranked 1st out of 350 graduates)
- Master of Science in Applied Statistics, ETH Zurich (with highest distinction)
- FRM (Financial Risk Manager), CFA (Chartered Financial Analyst)
Fields of expertise:
- Audit
- Accounting
- Taxes
- Business planning
- Risk management
- Investment analysis
Professional expertise:
After studying, Philipp Stirnemann joined a start-up as a partner, before working for a decade at Ernst & Young in Zurich, where he gained experience as a project manager in various industries. He also worked as a lecturer in corporate finance at a number of technical colleges and universities.
His previous activities were mainly focused on auditing (financial and regulatory audit). Further activities include consultancy in valuations, investment analysis, financial modelling and other subject areas related to accounting.
Languages:
German, English and Russisan (fluent)
Mauro Bonzanigo, CFO and Co-Founder

Ausbildung:
- Master of Arts in Banking und Finance, University of St.Gallen
Fields of expertise:
- Trustee services
- Accounting
- Payroll accounting
- Taxes
- Business planning
- Asset management/investment advice
Professional expertise:
After he finished his studies, Mauro Bonzanigo joined a start-up investment fund based in Zürich as an investment analyst. After that, he gained positions in Credit Suisse in the investment business, most recently at the Cantonal Bank of Zurich as a portfolio manager. Since 2008, Mauro Bonzanigo has been working in the trustee business sector.
Languages:
German, English (fluent)
Project managers
Roland Lüthy

Education:
- Certificate de Droit Transnational, Université de Genève
- Lic. iur., University of Zurich
- Licence to practice as an attorney-at-law
- Master in Business Administration, INSEAD, Fontainebleau/Singapur
Fields of expertise:
- Contract law
- Corporate law
- M&A and restructurin
- Financing solutions and securing collateral
- Private international law
- Capital market and securities law
Professional expertise:
After his graduation, Roland Lüthy gained experience in various legal functions, including working as an in-house counsel at Bank Julius Baer & Co., at the commercial court of the Canton of Aargau, and as a lawyer at Homburger law firm, one of the leading Swiss business law firms. He is admitted as a lawyer in Switzerland.
Roland Lüthy has represented company clients of various sizes and from different sectors in contract negotiations, proceedings before regulatory authorities, and advised his clients in various legal and regulatory matters. Roland Lüthy is currently working on his dissertation.
Languages:
German, English and French (fluent)
Hubert Baumgartner

Education:
- Master of Science in Business Administration
- Master of Science in Finance
Fields of expertise:
- Accounting
- Trustee activities
- Tax optimization
- Prevention and detection of economic crimes
- Risk management
Professional expertise:
Hubert Baumgartner has worked for over 15 years for leading audit companies (including the “Big Four”) in the areas of auditing, tax and legal advice, and financial and risk advisory services. Following this, Hubert Baumgartner worked as a consultant for national and multinational companies, also serving as senior counsel for auditing companies and law firms. As part of these activities, he handled international audit and IKS mandates. Currently Hubert Baumgartner is a CEO of EXANTUM Advisory Services
Languages: German, English and French (fluent)
Team

Best Practice Case
abrechnungen.ch was honoured as Best Practice Case example at the annual conference of «EXPERTsuisse». This top-notch conference was rightly entitled as «Sustainable Business Models» and «Digitalisation of the Fiduciary Services Sector». EXPERTsuisse is the Swiss Expert Association for Audit, Tax and Fiduciary.
bexio Platinum Trustee
We have been bexio experts since 2015 and support you from the initial setup and ongoing use of bexio through to the preparation of your annual financial statements — straightforward and practical. With us, you can make the most of everything bexio has to offer.
- Management of your bexio financial accounting and payroll accounting
- Support in selecting and using bexio Marketplace apps by agreement, such as Kontera or Triboni
- We optimize your digital accounting processes and actively look for practical ways to simplify them, making complex accounting workflows as efficient and lean as possible.
- 40% discount on bexio for our new clients (applies to new bexio customers)
As an innovative trustee, we consistently rely on digital solutions and efficient processes — recognized by industry associations and featured in the media. This allows us to create measurable value for our clients. Our innovative approaches have already been featured in the media several times.
Benefit from our many years of bexio experience, our proven setup, and straightforward collaboration.
Media about us
Artificial Intelligence in Finance
AI is changing the financial sector primarily by automating routine tasks, while responsibility and strategic decisions remain in human hands.
Philipp Stirnemann of Zurich-based trustee abrechnungen.ch sees great potential, but also warns against the hype surrounding an ever-growing number of new AI tools. At the same time, he expects AI to increasingly replace junior positions in accounting, raising the requirements for new employees.
More publications
Outsourcing and HR Strategy
In an article by the HR trade journal HR Today, several HR professionals — including Philipp Stirnemann of trustee abrechnungen.ch — share their views on outsourcing.
The experts discuss current trends in HR organization, cost advantages, the relocation of work back to Switzerland, employee loyalty, and customer needs.
HR Policy in Nearshoring
An article in a professional journal for finance and accounting about HR policy in nearshoring projects.
Philipp Stirnemann explains why the focus should not be limited to processes and controls, and why HR policy has a decisive impact on project success in a people-focused business such as fiduciary services.
Business Model and Internal Training
A profile of the fiduciary services start-up abrechnungen.ch.
Mauro Bonzanigo explains the innovative business model and shows why internal fiduciary training is necessary to ensure high quality standards.
Internationalization of Commercial Work
Increasingly qualified work is being carried out from international locations — with great success in the case of abrechnungen.ch.
In a report by 10 vor 10, Mauro Bonzanigo discusses this development in a short interview and explains how costs can be kept under control in a field such as fiduciary services.
Fiduciary Services with a New Structure
Philipp Stirnemann is one of the few Swiss professionals doing business in Kyiv. The shared service center of abrechnungen.ch supports the Swiss fiduciary firm with qualified employees in a digital setup.
This structure is unique in the Swiss fiduciary market. Aargauer Zeitung provides interesting insights into this innovative business model.