# Milieu: Law \& Policy Consulting

> We advise public sector clients on legal and policy development, compliance, evaluation, and stakeholder engagement across the EU since 1994\.

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## Pages
- [Home](https://www.milieu.be/)
- [HOW CAN YOU HELP?](https://www.milieu.be/milieu-is-supporting-the-implementation-of-the-eu-forest-strategy-2030/want-to-get-involved/)
- [Milieu is supporting the implementation of the EU Forest Strategy 2030](https://www.milieu.be/milieu-is-supporting-the-implementation-of-the-eu-forest-strategy-2030/)
- [Milieu Support project to the 3 Billion Trees Pledge – Events](https://www.milieu.be/milieu-support-project-to-the-3-billion-trees-pledge/milieu-support-project-to-the-3-billion-trees-pledge-events/)
- [Contact](https://www.milieu.be/contact/)

## Posts
- [Milieu to carry out study on active subsidiarity and multilevel governance in the EU's 2028–2034 budget framework](https://www.milieu.be/news/environment-and-climate-change/milieu-to-carry-out-study-on-active-subsidiarity-and-multilevel-governance-in-the-eus-2028-2034-budget-framework/)
- [Milieu concludes its work in the Horizon project ZeroPM on persistent and mobile substances](https://www.milieu.be/news/environment-and-climate-change/milieu-concludes-its-work-in-the-horizon-project-zeropm-on-persistent-and-mobile-substances/)
- [Milieu to assess the transposition of the Capital Requirements Directive VI for DG FISMA](https://www.milieu.be/news/financial-services/milieu-to-assess-the-transposition-of-the-capital-requirements-directive-vi-for-dg-fisma/)
- [Milieu hosts SMURF Focus Group Meeting on legal and funding frameworks for small forest owners](https://www.milieu.be/news/environment-and-climate-change/milieu-hosts-smurf-focus-group-meeting-on-legal-and-funding-frameworks-for-small-forest-owners/)
- [Milieu publishes study on disinformation and public engagement in the green transition](https://www.milieu.be/news/environment-and-climate-change/milieu-publishes-study-on-disinformation-and-public-engagement-in-the-green-transition/)

## Services
- [Compliance assessment of transposition and alignment](https://www.milieu.be/services/compliance-assessment-of-transposition-and-alignment/): Since 2003, Milieu Consulting has supported the European Commission in its task to ensure that EU legislation is fully and correctly transposed and implemented in the Member States\. Our compliance assessment studies support the Commission’s work in preparing infringement procedures, reviewing the implementation of EU law, and conducting future evaluations\.
- [Studies on implementation and enforcement](https://www.milieu.be/services/studies-on-implementation-and-enforcement/): We believe that ‘law without enforcement is just good advice’ \(Abraham Lincoln\)\. Effective implementation and enforcement are essential to ensure that legislation achieves its objectives\. For EU policies to deliver results, EU law must be implemented and enforced in the Member States\. Since 2003, Milieu has supported the European Commission to assess whether directives and regulations are properly implemented and enforced\.
- [Policy\-focused Event organisation](https://www.milieu.be/services/policy-focused-event-organisation/): Milieu has extensive experience in organising and facilitating policy\-focused events that support evidence\-based decision\-making and strengthen dialogue between EU institutions, Member State authorities, stakeholders and the wider public\. We have delivered a wide range of formats, from high\-level workshops and expert roundtables to online webinars, focus groups and in\-person events in Brussels and across the Member States\. These events play a crucial role in translating policy into practice, providing an interactive space where complex issues can be discussed, clarified and brought to life\.
- [Guidance](https://www.milieu.be/services/guidance/): EU legislation must be flexible enough to be relevant and workable across all Member States\. Accordingly, the legislation is not always very prescriptive and implementation can be complex and challenging for authorities and stakeholders\. 
- [Stakeholder consultation](https://www.milieu.be/services/stakeholder-consultation/): Stakeholder consultation is a cornerstone of participatory policymaking in the EU\. Engaging citizens, businesses, civil society, experts, and public authorities helps ensure that policies reflect diverse perspectives, are grounded in real\-world experience, and respond to needs across Member States\. Effective consultation enhances transparency, legitimacy, and accountability, and contributes to more relevant, practical, and impactful EU policies throughout the policy cycle\.

## Sectors
- [Energy](https://www.milieu.be/sectors/energy/): The 2025 State of the Energy Union report published by the European Commission emphasizes that energy policy is crucial for European competitiveness, security and the move towards climate neutrality by 2050, as well as for strengthening the European Union \(EU\)'s energy independence and resilience in an increasingly complex geopolitical context\.
- [Transport](https://www.milieu.be/sectors/transport-2/): An integrated transport sector is vital for the free movement of individuals, services and goods in the European Union \(EU\)\. Transport was among the first common policies of the EU, reflecting the importance of a strong EU transport network to support trade, economic growth and job creation\. 
- [Justice and home affairs](https://www.milieu.be/sectors/justice-and-home-affairs/): Justice and home affairs \(JHA\) is a wide\-ranging and rapidly evolving area of European Union \(EU\) policy, encompassing the Union's efforts to build a common area of freedom, security and justice for its citizens and residents\. It spans a broad set of interconnected policy fields, from migration, asylum and border management to judicial cooperation in civil and criminal matters, police cooperation, the fight against organised crime and terrorism and the protection of fundamental rights
- [Human and Animal Health](https://www.milieu.be/sectors/health-and-animal-welfare/): Europe faces significant and interconnected challenges in human and animal health\. Human health is widely recognised as a human right and a prerequisite for inclusive and sustainable economic growth, while animal health is essential to food safety, resilient food systems, biodiversity and disease control\. Animal welfare is also a core consideration in European Union \(EU\) policy, reflecting Article 13 of the Treaty on the Functioning of the European Union \(TFEU\)’s recognition of animals as sentient beings\.
- [Environment and climate change](https://www.milieu.be/sectors/environment-and-climate-change/): Milieu supports European Union \(EU\) institutions, public authorities and other organisations in designing, implementing and evaluating environmental and climate policy\.
Europe’s environmental challenges are closely connected\.

## Team Members
- [Nathy Rass\-Masson](https://www.milieu.be/about/our-team/nathy-rass-masson/): Nathy is a French\-trained lawyer who joined Milieu in 2006\. She specialises in the analysis of EU law and its implementation in the Member States, for the European Commission, the European Parliament and other EU bodies\.
Her core expertise lies in assessing the transposition of EU legislation\. She has coordinated numerous multi\-country conformity assessments in the field of environment \(nature protection, waste, water, air, chemicals and climate\), as well as in transport, employment, migration and criminal law\. 
- [Faustine Péclier](https://www.milieu.be/about/our-team/faustine-peclier/): Faustine Péclier is a French national who joined Milieu as a Legal Trainee in September 2026\. She holds a Master’s degree in European Law and Human Rights from the Faculty of Law at Jean Moulin Lyon 3 University, as well as an LL\.M\. in European Law from the College of Europe in Bruges\. During her studies in Bruges, she wrote her Master’s thesis on mirror clauses in free trade agreements\.
- [adam lantz](https://www.milieu.be/about/our-team/adam-lantz/): Adam Lantz is a Swedish lawyer who joined Milieu as a Legal Trainee in September 2026\. His work includes conducting legal and policy research on EU law, policies and decision\-making processes; carrying out comparative research on the legislation of EU Member States; contributing to reports, studies and proposals for tenders issued by EU institutions; and collecting and analysing data through engagement with stakeholders and experts\.
Before joining Milieu, Mr Lantz worked at the Secretariat of the European Parliament, where he analysed legislative and non\-legislative files, supported institutional coordination, contributed to parliamentary processes and responded to enquiries from stakeholders\. His other relevant legal experience includes contributing to legal submissions before the European Court of Human Rights, conducting research on fundamental rights and vulnerable groups, and supporting EU\-funded projects on victims’ rights and procedural safeguards\.
Mr Lantz also has experience in cross\-border private law, including international matters relating to taxation, inheritance and estate planning, as well as in legal technology, contract automation and regulatory compliance\. His academic work includes a master’s thesis entitled “The Parties’ Access to Justice in the Preliminary Ruling Procedure”, which examined procedural rights within the EU preliminary ruling system\. He holds a Master of Laws from Uppsala University and has completed additional coursework in Business Administration at Lund University\. His areas of specialisation include EU law, Public international law, institutional affairs and legislative processes\.
Mr Lantz is fluent in English and Swedish and has a basic knowledge of French\.
- [Fabio Baù\-Rivière](https://www.milieu.be/about/our-team/fabio-bau-riviere/): Fabio is a French national who joined Milieu in March 2024\. He holds a Master’s degree in Human Rights and EU Law from Paris 1 Panthéon\-Sorbonne \(France\), as well as an LLM in International and EU Law from a joint programme between the University of Nottingham \(UK\) and the University of Nantes \(France\)\. Fabio specialises in human rights, equality and discrimination issues, and has experience in EU social and migration law\. His interests led him to write his master’s theses on the impact of austerity measures on socio\-economic rights and the consequences of COVID\-19 emergency measures in the EU on the rights of vulnerable groups\. Following a traineeship at a law firm in Paris specialising in immigration law, Fabio joined the Permanent Representation of France to the EU as a legal and research assistant to the social affairs advisers\. In this role, he developed his research and analytical skills, as well as important experience in EU social rights and discrimination policy\.
In addition to his native French, Fabio speaks English fluently\.
- [Raffaella D'Antonio](https://www.milieu.be/about/our-team/raffaella-dantonio/): Raffaella D’Antonio is an Italian lawyer working as an Associate to Milieu since 2021\.  She specialises in human rights and environmental law, with expertise in EU and international legal frameworks and their implementation at national level\. Her work focuses on legal research, comparative legal analysis, assessment of legislative transposition and compliance, and stakeholder engagement, particularly in relation to environmental protection, participatory rights, access to justice, consumer law, fundamental rights and business and human rights\. With Milieu, Raffaella has delivered impactful studies and legal analysis for EU institutions and agencies, including DG ENV, DG JUST, DG HOME, CoR and FRA\.
She holds a five\-year Master’s Degree in Law from the University of Naples Federico II \(Italy\), an LL\.M\. in International Legal Studies from Newcastle University \(United Kingdom\), and a PhD from Newcastle University on human rights and environmental protection\.
Before joining Milieu, Raffaella taught EU law and human rights’ law at undergraduate and postgraduate level in Italy and the UK\. Her previous work also includes research activities in environmental law at the University of Trento \(Italy\) and independent consultancy for EU institutions\. Her previous experience also includes work on a third\-party intervention before the European Court of Human Rights concerning environmental pollution and human rights violations, and traineeship experience at the Department for the Execution of Judgments of the ECtHR\.

## Categories
- [Environment and Climate Change](https://www.milieu.be/news/environment-and-climate-change/)
- [Justice and Home Affairs](https://www.milieu.be/news/justice-and-home-affairs/)
- [Employment and Social Affairs](https://www.milieu.be/news/employment-and-social-affairs/)
- [Financial Services](https://www.milieu.be/news/financial-services/)
- [Digital and Data Policy](https://www.milieu.be/news/digital-and-data-policy/)

## Optional
- [Sitemap index](https://www.milieu.be/sitemap_index.xml)