Marie Vastmans

Marie is a Partner and co-head of Janson's Public and Administrative Law department, where she practices in all areas of public and administrative law, with a particular focus on public procurement and public contracts, including concessions and public-private partnerships (PPPs).

With over 20 years of experience, Marie has been instrumental in advising both contracting authorities and economic operators throughout the entire lifecycle of public works, supply, and service contracts. Her extensive knowledge and proficiency extend to litigation related to the award and performance of public contracts, making her an invaluable asset in navigating complex legal landscapes.

Beyond her legal practice, Marie is deeply committed to advancing knowledge in public procurement. She serves as the Managing Director of ESIMAP (Centre d’Etudes Services et Information en matière de Marchés Publics), a non-profit organization dedicated to this field. In her role, Marie oversees various training and publication initiatives, ensuring that valuable information and insights are shared widely.

Marie is recognized as a Specialist in administrative and public procurement law by the French Bar Association of Brussels. She is also an active member of the Public Law Commission of the Brussels Bar and Avocats.be, further solidifying her status as a leading expert in her field. Additionally, she practices in both French and Dutch.

    • Advising the Belgian State in awarding a contract for passport production, ensuring a smooth and successful process.

    • Providing counsel to various companies on participating in public contracts for medical devices, aiding navigation of public procurement complexities.

    • Assisting he City of Namur in implementing the Confluence project and managing European subsidies, crucial for the city's development.

    • Supporting the project developer for Mont-Légia hospital, ensuring compliance with technical and regulatory standards.

    • Providing guidance to SWL in the European Court of Justice regarding the "in-house" exception and public-public partnerships, facilitating cooperation between public entities.

    • Advising a contractor in the construction of Mons railway station, ensuring adherence to guidelines and standards.

    • Assisting the developer of Rives Ardentes eco-neighbourhood in Liège, managing European subsidies, and promoting sustainability and community development.

  • Public and Administrative law

  • Education:

    Master of laws, with a Major in Public and Administrative law (ULB - 2000).

    Advanced Master Degree in Public and Administrative Law (ULB - 2003).

    Advanced Community Law Training Program (College of Europe - 2005).

    Bar : Brussels

    • « L’attribution des marchés publics » in X, Le droit des marchés publics à l’aune de la réforme du 1er juillet 2013, Conférence du Jeune Barreau en collaboration avec les Editions Larcier et intitulé, 2014

    • V. DOR & M. VASTMANS, Commentaire article par article de la loi du 17 juin 2016 relative aux marchés publics, Wolters Kluwer, 2016

    • Je négocie, tu négocies, ils négocient… La négociation de vos marchés publics en pratique, Vanden Broele, 2019

    • M. VASTMANS et J. PIROTTE, « Irrégularités, erreurs et omissions : comment réagir ? », Chronique des marchés publics 2020-2021, EBP

    • M. VASTMANS et F. VISEUR, « Le « in house » et la coopération horizontale non institutionnalisée » et « La notion du monopole de fait et de droit dans les marchés publics » in X, Aux frontières des marchés publics. Réflexions sur les limites du champ d’application de la réglementation relative aux marchés publics, Larcier, 2020

    • Le nouveau droit des marchés publics en Belgique – De l’article à la pratique – Liber Amicorum Y. CABUY, Larcier,  2019

Contact details.

Email: m.vastmans@janson.be

Phone: +32 2 675 30 30