Marie Sixtine du Rusquec 

Marie-Sixtine du Rusquec advises and assists companies and local authorities, individuals, and associations on issues related to public business law.

She acts both as counsel and in litigation.


Marie-Sixtine du Rusquec holds a Master II in economic law, public procurement course (2016 - Nanterre Paris X University) and a Master I in economic law (2015 - Nanterre Paris X University).    

Lawyer since 2017, Marie-Sixtine du Rusquec practised public business law in a firm specializing in public law, as well as in an Anglo-Saxon firm, before joining Atmos in 2022


Marie-Sixtine du Rusquec has a background in public law and is mainly involved in public business law.

She defends the interests of her clients in litigation in the field of public economic law, particularly in the area of public contracts.

In this respect, she has advised numerous public authorities and companies in connection with the award and performance of public contracts and matters of public property, urban planning, and construction.

Marie-Sixtine du Rusquec deals with a wide variety of cases, as do the firm's clients, including companies and various economic actors, local authorities, individuals and associations, both as counsel and in litigation.

Her missions cover the whole of the contentious and pre-litigious treatment of the cases delegated to her, namely the development of litigation strategies, research for amicable solutions, referral to the jurisdictions, drafting of the writings and the representation in front of the jurisdictions and judicial expertise.

English: Fluent

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