European Union

• EU Commission - General Directory Regional Policy
• Ceská republika - Ministerstvo pro místní rozvoj - Czech Republic
• Ministry of Finance - Ireland

National and Federal Ministries

• Federal Ministry of Economics and Technology
• Federal Ministry of Finance
• Federal Ministry of Transport, Buildings and Housing
• Federal Office for Building and Housing
• Bavarian State Ministry of Economics, Transport and Technology
• Ministry of Economics Brandenburg
• Ministry of Economics, Technology and Transport - North Rhine-Westphalia
• Ministry of Economics and Labour - Saxonia
• Ministry of Economics - Mecklenburg-Vorpommern
• Ministry of Economics and Infrastructure - Thuringia
• Ministry of Housing and Transport of North Rhine-Westphalia
• Ministry for Intergenerational Affairs, Family, Women and Integration of North Rhine-Westphalia
• Ministry of Economics, Labour and Transport Lower Saxonia
• Thuringian Ministry of Education, Science and Culture
• Senate Administration of Economics, Labour and Women, Berlin
• State Chamber - Saxonia-Anhalt

Municipalities, public institutions, associations and enterprises

• Expert Commission Research and Innovation (EFI), Berlin
• Infineon Technologies AG
• Project Ruhr ltd., Essen
• German Association of Tax Advisers (Deutscher Steuerberaterverband)
• Landesentwicklungsgesellschaft North Rhine-Westphalia  
• Association of Tax Advisers in Westfalen-Lippe e.V.
• City of Dortmund
• City of Münster
• State Capital of Saarbrücken