Marco Büttner specializes in advising on public procurement, state aid, and public commercial law, with a focus on infrastructure and digitalization projects. He advises his clients on the preparation and implementation of procurement projects, with a focus on the procurement of planning and construction services as well as complex partnership-based construction models. In addition, Mr. Büttner advises on issues related to subsidy and State aid law, particularly regarding exemption conditions and grounds of compatibility, as well as on securing financing for public-sector projects.