Mangeat Attorneys at Law LLC > Geneva, Switzerland > Firm Profile

Mangeat Attorneys at Law LLC
1211 GENEVE 3

Switzerland > Banking and finance: Geneva Tier 3

Mangeat Attorneys at Law LLC provides a range of services, including advising on financings, loans, and investments, and providing strategic guidance to financial institutions. In addition, the team has particular strength in the areas of individual and collective asset management issues and AML work. Fabien Aepli leads the team, and has expertise across regulatory authorisations, retrocessions, and fintech-related matters. Grégoire Mangeat, who has over 20 years’ experience as a litigator, handles financial crime matters and investigations. Associate Lukas van Dobben is also a key name to note.

Practice head(s):


‘It is a young and dedicated team. The people are efficient, master the new technologies and offer a tailor made service.’

‘The individuals I am working with are dedicated, available and responsive.’

‘The people are the main strength. MANGEAT are knowledgeable attorneys in finance. They provide exceptional advice for fintech projects, including decentralised finance.’

‘We’ve been closely engaged with Fabien Aepli, who provided us with exceptional customer care, flexibility to structure the advice up to the view of the client, knowledge of any related topic within the subject of the expertise, and strict deadlines on deliverables.’

‘Highly skilled staff offering tailor made approach.’

‘The whole team is very professional. Each of the partners and senior associates are extremely solution-oriented, have high communication skills and are very dedicated to their clients’ needs.’

‘Fabien is an outstanding professional, much appreciated for leaving no stone unturned while being extremely focused, efficient and straight-to-the point; with Fabien there is no place for unnecessary considerations. Fabien’s availability is always a vital asset.’

Switzerland > Fintech Tier 3

Mangeat Attorneys at Law LLC has a notable track record of work on cryptocurrency and DLT projects, in addition to its coverage of matters related to finance, AML, and corporate law. ‘Knowledgeable and proactive partner’ Fabien Aepli leads the practice, and has broad experience in areas which include blockchain, STOs, cryptocurrencies, and tokenisation of assets. Associate Diego Leis is notable for his experience in litigation.

Practice head(s):

Other key lawyers:


‘MANGEAT are knowledgeable attorneys in finance. They are innovative and follow regulatory updates. They provide exceptional advice for Fintech projects including Decentralized Finance.’

‘We’ve been closely engaged with Fabien Aepli, who provided us with exceptional customer care, DeFi knowledge, diligence, precision.’

‘Great team and knowledge in digital assets.’

‘Fabian Aepli is very responsive and pragmatic.’

‘Mangeat has been the reference law firm accompanying me throughout my whole entrepreneurial journey, proving to be a great support at different stages of development of my enterprise, and consistently proving their knowledge and quality of service.’

‘Fabien Aepli constantly stood out as a quality, knowledgeable, proactive partner at Mangeat.’

‘The company has been active for a long time in the crypto and digital assets space, and made a further step ahead with specific competences in DeFi for top global leaders in this space’

‘Fabien Aepli is always very much on top regarding innovation in the finance and regulation space, proactively anticipating needs and recommending solutions which are useful and fixing real business and legal issues.’

Key clients

Swiss Crypto Advisors SA

Re-Company SA

Alphemy Capital SA


Switzerland > Real estate and construction Tier 3

Mangeat Attorneys at Law LLC acts for both private and public clients on a range of real estate and construction matters including development, contract negotiation, due diligence, financing and leaseback transactions. The practice also provides advice on environmental land matters. Co-practice head Joël Chevallaz has longstanding experience advising clients on high-value real estate transactions and representing clients in complex construction litigation. Pierre Rüttimann , who also leads the team, is specialised in real estate securitization and the development of complex residential portfolios.

Practice head(s):

Joël Chevallaz; Pierre Rüttimann



‘Great team. Everyone focuses on the client’s goal. Always available.’

‘Everyone has strong skills and remains available to satisfy the client.’

‘They are a leading firm in Geneva and especially in real estate.’

‘Joel Chevallaz has a unique expertise in real estate in Geneva with his double background: lawyer and real estate entrepreneur. That makes him a leading professional in Geneva and French Swiss speaking area with a know-how and precious connections. He’s a deal maker and a true expert.’


Key clients

TCA Asset Management SA

Helvetic Capital Holding SA

La Scie SA

Rivlin France SA

RES-Invest SA

Copimmob Esplanade/Petit-Senn société coopérative

Egg-Telsa SA (Geneva Airport project)

JDRM Immobilier SA

Les Belvédères SA

Sogeca SA

Work highlights

  • Advised TCA and structured successfully for TCA 2 private bonds issues to finance the 5 stars Hotel Marriot Aegon Autograf in Mykonos (Greece) and a real-estate development in Switzerland (value of CHF 10 million and 5 million).
  • Advised Helvetic Capital Holding SA on a real estate development in Geneva for a value of CHF 45 million. This is a development project of twelve luxury apartments in the high-end neighborhood of Geneva.
  • Advised La Scie SA on a commercial real estate development in Geneva (Versoix) with Lidl, a major German retail group, as the main future buyer.

Switzerland > Commercial, corporate and M&A Tier 4

Mangeat Attorneys at Law LLC‘s team handles commercial, corporate and M&A transactions, and has a focus on the financial services, healthcare, and IT sectors. Fabien Aepli leads the team, and covers private M&A, compliance and governance matters, and organisational rules. Joel Chevallaz has expertise in the acquisition and sale of private companies, and leads the firm’s restructuring and insolvency practice. Counsel and operations director My-Hué Tan has expertise in M&A, corporate governance, and compliance risks.

Practice head(s):


‘Mangeat are knowledgeable attorneys in finance. They provide us exceptional advice in terms of corporate structuring and regulatory advice.’

‘We’ve been closely engaged with Fabien Aepli, who provided us with exceptional customer care. A man of his word, precision, and strict deadlines on deliverables.’

‘The firm has created a new line of business to support clients in risk management. The attorney in charge has a background as in-house counsel with large US corporates and is very knowledgeable and proactive about the topic.’

‘My-Hué Tan recently joined Mangeat to develop the new risk management practice, being very attuned to client needs. She is not only rigorous and diligent but provides excellent service, in particular thanks to her broad background as a lawyer as well as manager in a corporate setting.’

‘Dedicated and proactive.’

‘Availability, dedication, research and tailor made approach (Fabien Aepli and Grégoire Mangeat).’

‘Mangeat has been the law firm accompanying me throughout my whole entrepreneurial journey, proving to be a great support at different stages of development of my enterprise, and consistently proving their knowledge and quality of service.’

‘Fabien Aepli constantly stood out as a quality, knowledgeable, proactive partner at Mangeat.’

Work highlights

  • Assisted SonarSource SAto lead negotiations and representation in a in a growth equity financing. The financing raised $412 million in new investment and values SonarSource at $4.7 billion.
  • Assist Re-Company SA on all corporate and commercial matters, including within financing rounds.
  • Assist MITC Mobility SA regarding an agreement with Uber to take over transportation business through a transfer of undertaking.

Switzerland > Dispute resolution: litigation Tier 4

Mangeat Attorneys at Law LLC, based in Geneva, has notable expertise in white-collar crime mandates and internal investigations. The group is particularly active on behalf of private clients, and draws in high-profile individuals from across Europe. Founding partner Grégoire Mangeat co-leads the team alongside Fanny Margairaz and Joël Chevallaz.

Other key lawyers:


‘MANGEAT has a great and impressive team of lawyers/subject matter experts. The quality of the advice is outstanding. The collaboration is very solution oriented and always pleasant.’

‘Grégoire Mangeat is an amazing lawyer with a very strong commercial understanding, which is much appreciated. He understands the business and the issues of the specific client and is capable of delivering tailored services of exceptional quality.

‘This is a sophisticated, focused group of lawyers led by a Grégoire Mangeat, who is a leading light of the Swiss bar. They handle difficult cases and are collegiate as co-counsel.’

‘Grégoire Mangeat is a brilliant advocate and strategist. He knows everyone in Geneva and handles the most difficult cases with grace and skill.’

‘Fanny Margairaz is an excellent writer and litigator.’

‘The duo of Grégoire Mangeat and Fanny Margairaz is very efficient and obtains very good results.’

‘Grégoire Mangeat and Fanny Margairaz are very invested in the case and have a perfect knowledge of the file. Their overall strategy is impressive.’

Work highlights

  • Representing the daughter of the former, now deceased, President of Uzbekistan in criminal proceedings opened by the OAG for suspected money laundering in relation to alleged bribes paid by foreign companies to her to operate in Uzbekistan.
  • Defended the chairman of beIN Media Group LLC (beIN) and Paris Saint-Germain in criminal proceedings opened in March 2017 by the Federal Office of the Attorney General (OAG) for suspicion of active private bribery.
  • Defended the former President of the Geneva Canton State Council in criminal proceedings opened against him by the Geneva Office of the Attorney General (OAG) for acceptance by a public official of an undue advantage in relation to an invitation he received from the Abu Dhabi Crown to attend the Formula One Abu Dhabi Grand Prix, as well as the private funding of a political survey by Geneva businessmen.

Switzerland > Employment

Frequently drawing on its members own in-house experience, the employment team at Mangeat Attorneys at Law LLC offers clients tailored advice on both private employment and public labour law matters; practice head Laurence Crittin brings industry experience in sectors including banking, finance, luxury goods, and healthcare to the firm.

Mangeat has a well-established expertise in diverse and complex legal fields with a strong domestic and international experience. Being forward thinking, the firm has added two new practices, risk management and compliance, and general counsel desk, which offer clients alternative services and foster synergies with other practice areas. We combine an innovative and creative approach to help our clients achieve their objectives and mitigate their risks in an ever-changing and uncertain economic, health and regulatory environment. We dare to care about our clients’ reputational risk and help them navigate through each crisis and the wide array of legal challenges.

We offer on time, succinct and practical legal advice and solutions in highly sensitive contexts and are experienced in managing complexity and risks in cross-functional matters. We are agile in challenging the status quo and leveraging legal project management to efficiently assist our clients in complex dispute matters.

Mangeat has continuously grown by including different ways of thinking, backgrounds, and cultures. The multilingual team members have been trained and qualified in Switzerland and abroad. They benefit from diversified industries and sectorial experience gained in private practice and in-house at multinational companies. Our team is also constantly collaborating with law firms and practitioners in other jurisdictions.

Banking & finance Fabien Aepli
Corporate & commercial Fabien Aepli
Corporate & commercial Joël Chevallaz
Data Protection Laurence Crittin
Data Protection My-Hué Tan
Dispute resolution Grégoire Mangeat
Employment Laurence Crittin
Financial Crime & Investigation Grégoire Mangeat
Financial Crime & Investigation Fanny Margairaz
Pharmaceuticals, Healthcare & Life Sciences Fabien Aepli
Restructuring & Insolvency Joël Chevallaz
Real estate & Construction Pierre Rüttimann
Risk Management & Compliance My-Hué Tan
General Counsel Desk My-Hué Tan
Spanish & Latin-American Desk Diego Leis
Number of lawyers : 11-50
Chinese dialects
Main Contact : Grégoire Mangeat (

CLIENT: Francesco Abbate, Managing Partner
COMPANY/FIRM: Swiss Crypto Advisors SA
TESTIMONIAL: “We have been using the services of Mangeat Attorneys since the launch of our business especially for strategic advice in banking & finance, anti-money laundering and corporate law, and of course for our STOs-related activities, mainly with Fabien Aepli, Nurith Cohen and Diego Leis. Their knowledge of Swiss financial regulations applicable to blockchain and cryptocurrency projects is essential to us. Their professional support and high-quality advice are extremely appreciated by our team. They are responsive, pragmatic and technically skilful. Also, they are very clear and transparent with regard to their fees. For these reasons, they participate in business meetings, understand the ultimate business goals and hence tailor the right legal advice and consultancy to ultimately create value for us and for our clients; I see this as a shift from a “cost of doing business” to “business investment yielding returns”.”

CLIENT: Gilles Bos, Chairman
TESTIMONIAL: “Mangeat Attorneys have been active in the medical device industry for many years, and they regularly assist us on commercial agreements (distribution agreements, manufacturing agreements, technology transfers, etc.), asset and share deals, corporate governance, regulatory issues and dispute resolution. Our main contacts are Fabien Aepli and Nurith Cohen for commercial and corporate matters, and Grégoire Mangeat and Sara Dousset for regulatory matters and dispute resolution. Their knowledge of the industry, their legal skills and their commitment to deliver excellent work in a consistent manner are highly valuable and appreciated assets for our business. They are efficient, pragmatic and business-oriented.”

CLIENT: Samer Darwiche, CEO
TESTIMONIAL: “The quality level of the work that Mangeat Attorneys provide clearly reaches the level of the first-tier big firms with which I have worked so far. The firm does also have an outstanding professional approach and sense of the client relationship.”

When building a powerful reputation, and with the dedication to deliver outstandingly, it is essential to always keep in mind the moral obligation to act responsibly and ethically, to produce an overall positive impact on society.

At MANGEAT we believe in the importance of Corporate Social Responsibility, especially in our capacity as attorneys at law.

Therefore, we are involved in various pro bono and volunteer activities, be it to defend the access to justice or to seek better systems of justice.

Our pro bono work goes beyond the traditional representation of people with limited resources. The importance of Law is growing on a daily basis and with that our responsibility to address the pressing challenges that ensue.

We aim to truly make a difference and address problems such as unequal access to justice, devastation caused by conflicts and massive immigration waves that follow, global health threats and of course important human rights issues (for instance with members or our team participating in the Geneva Human Rights Commission).

Our volunteer activities also include commitments beyond the legal community. For instance, to actively support charitable organisations.

MANGEAT has continuously grown by including different ways of thinking, backgrounds, and cultures. The multilingual team members have been trained and qualified in Switzerland and abroad. They benefit from diversified industries and sectorial experience gained in private practice and in-house at multinational companies in countries that include among othersThe U.S., Turkey, France, United Kingdom, Germany, Italy, Spain and India. 

We are constantly collaborating with law firms and practitioners in other jurisdictions and our team advises Spanish-speaking clients through its dedicated Spanish and Latin-American Desk. 

Our experience includes: 

  • Working as an extended resource to the legal department of a global healthcare company on all commercial matters  and assisting the client in handling an increasing needs for legal support across the EMEA region.
  • Assisting a client in opposing his extradition to the United States within the context of the FIFA scandal. 
  • Assisting a foreign central bank within the context of criminal proceedings initiated by the Federal Office of the Attorney General in relation to bribes paid to certain employees. 
  • Advising a Spanish private equity investor on the acquisition of shares in a luxury Swiss watch company, including drafting of the shareholders’ agreement. 
  • Representing Latin American heirs in Switzerland in a complex and multijurisdictional inheritance dispute. 
  • Assisting the daughter of a foreign state’s former leader in criminal proceedings for money laundering con- ducted by the Federal Office of the Attorney General within the context of a major bribery scandal that led to the seizure of assets amounting to around USD 800 million and mutual legal assistance requests from 20 foreign states. 
  • Advising an American manufacturer in managing legal and operational risks related to their product quality and recall campaign. 
  • Advising an Australian manufacturer with global sale footprint in managing their legal, operational and commercial risks; Assessing and identifying areas of continuous improvement to their product warranty and claim processes. 


International network: MANGEAT has developed a global network of over 250 lawyers in multiple jurisdictions across the regions to assist its clients in all types of cross-border activities.