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Our law firm in Lausanne

Our history

The law firm Mazou Attorneys-at-Law

The law firm Mazou Attorneys-at-Law and the company Mazou Attorneys-at-Law Ltd were founded by Miriam Mazou. Her ambition is to provide a first-class service in the most specialized fields of white collar crime, business criminal law, criminal law and procedure, international legal assistance and criminal and commercial litigation.

Mazou Attorneys-at-Law Ltd works with attorneys-at-law Ella Longchamp, Marie Besse and Juan Pedro Barroso.

Defending you is our passion.

Specialization SBA

Ms Miriam Mazou holds a title of specialist lawyer SBA criminal law issued by the Swiss Bar Association (SBA). This title guarantees a high level of competence and its continuous updating.


Our attorneys have extensive experience in the practice of the cantonal (Vaud, Geneva, etc.) and federal judicial authorities. They plead before the Federal Criminal Court.

University teaching

Miriam Mazou was a lecturer at the University of Lausanne from 2019 to 2022, teaching the students of the Master in Legal Profession.

A firm of experts

The expertise of Mazou Attorneys-at-Law


Criminal law


and commercial

Your questions, our answers

Why did you choose these legal specialties?

By passion. Out of a desire to excel in these highly technical and specialized fields, which require constant updating of our skills. And above all, to offer our clients the highest quality of service within a very short time frame. Being used to dealing with cases in our areas of expertise, we can ensure the rapid execution of the tasks entrusted to us. Our mission is to help you solve often complex problems with a high degree of expertise.

Who are the lawyers who make up your firm?

The firm is composed of the lawyers Me Miriam Mazou, Me Ella Longchamp, Me Marie Besse, Me Juan Pedro Barroso and Naël Ahmed, trainee lawyer.

Do you collaborate with other firms?

Yes. Our firm has chosen to have a human-sized structure. Therefore, in parallel, our lawyers have an excellent network of first-rate colleagues in cities such as Geneva, Zurich, Paris, London and Milan. We also collaborate with large law firms, which appreciate entrusting us with specialized cases when they feel the need to do so.

Do you also manage cases in cities other than Lausanne?

Yes, Mazou Attorneys-at-Law is based in the heart of Lausanne, but its specialists regularly travel to other Swiss cities and even abroad. Our specialists are accustomed to pleading before other authorities and to managing cases between several cantons, particularly Geneva, or in several countries. Our lawyers also regularly appear before the Federal Criminal Court in Bellinzona.

Do you also work on international cases?

Yes, the firm’s lawyers have recently handled cases involving the United States, the United Kingdom, France, Italy, and Turkey in a smooth and efficient manner. Our lawyers also have close links with legal specialists in other countries to deal with particularly complex cases. This experience will be invaluable in international cases.

What languages do you work in?

French, English, German and Italian.
For cases requiring knowledge of other languages, such as Russian or Spanish, we use the services of leading interpreters and translators. Whatever the language of the case, we know how to manage it.

Are cases shared among several lawyers?

Yes, if the complexity of the case or the degree of responsiveness requires it. Sometimes, in the context of certain cases, you will have the assistance of two or more lawyers. This joint work can take place during the preparation of the case, or even during hearings before the courts. You will always have a main contact person.

How are the services of the firm invoiced?

During our first meeting, this central topic will be discussed in a transparent manner. The fees are set considering the training and experience of our lawyers, the responsibility assumed by them, the complexity of the mandate and the degree of urgency. Depending on the type of case, we will agree with you on a billing system that best meets your expectations, generally an hourly rate. It is also possible to consider fixed fees, as well as the result obtained. The degree of specialization of our lawyers has a price, but will be, as you will see, justified based on the speed of execution and the results you will obtain.

Is there a waiting period for new clients?

No. You are guaranteed to have an initial contact with one of our lawyers as soon as possible, regardless of the complexity of your case or its degree of urgency. Our lawyers are efficiently organised to ensure high availability and responsiveness. We will devote the necessary time to a meticulous follow-up of your file.

Our lawyers specialized in business and corporate criminal law

The Mazou Attorneys-at-Law law firm is composed of lawyers who share a passion for criminal and commercial defence and legal advice and who, for the most part, have been working together for many years. The team also includes a trainee lawyer and two legal assistants.
Do you need legal support?

Our specialized lawyers will advise and defend you.

Contact our law firm

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