| 1988-1989 | Assistant to the Director, Austrian Farmers' Union, Vienna |
| 1989-1997 | Member, Cabinet of Austrian Federal Ministers of Agriculture and Forestry Franz Fischler, Wilhelm Molterer, Vienna |
| 1993-1994 | Member, Negotiation team on expert level for the agriculture chapter of the Austrian accession negotiations to the European Union |
| 1995-2002 | Head, EU-Coordination Unit, Austrian Federal Ministry for Agriculture and Forestry, Vienna; Austrian Spokesman, SCA - Special Committee on Agriculture, Council of the European Union, Brussels |
| 1998 | President, SCA - Special Committee on Agriculture, Council of the European Union, Brussels |
| 1998-2002 | Deputy Director General, Austrian Federal Ministry for Agriculture and Forestry, Vienna |
| 2002-2007 | Director General, Department Agriculture and Nutrition, Austrian Federal Ministry for Agriculture and Forestry, Environment and Water Management, Vienna |
| 2006 | Head, National delegation, Council of Agriculture, Council of the European Union, Brussels |
| 2007-2013 | Director for Rural Development and Agriculture Finances, General Secretariat, Council of the European Union, Brussels |
| since 2013 | Federal Minister for Agriculture, Forestry, Environment and Water Management of the Republic of Austria, Vienna |
| since 2017 | President, Union of European Federalists Austria, Vienna |
| 1982-1995 | Studies, Landscape Ecology and Planning, University of Natural Resources and Life Sciences Vienna |
| 1982 | Founding member, GLOBAL 2000; "Freunde von Greenpeace", Vienna |
| 1982-1988 | Formation and development, GLOBAL 2000, Management of environmental protection campaigns (e.g. Power plant Hainburg, acid rain, transit traffic) |
| 1983-2006 | Member, "Plenum", GLOBAL 2000, Vienna |
| 1992-2006 | Chairman, GLOBAL 2000, Vienna |
| 1995-2006 | Political chief executive, GLOBAL 2000, Vienna |
| 1996-2006 | Head, Department "Politics & campaigns", GLOBAL 2000, Vienna |
| 1998-2006 | Representative, GLOBAL 2000 at "Friends of the Earth International" |
| Board Member, Ökobüro, Vienna |
| since 2007 | Chief Executive, Climate and Energy Fund, Vienna |
| 1998-1999 | Marketing Systems Analyst, Procter & Gamble, Schwalbach |
| 1999-2001 | Forschungsassistent, Doktorand, JKU, Linz |
| 2002-2003 | Forscher, Borealis GmbH, Linz |
| 2004-2006 | Projektleiter F&E, Borealis GmbH, Linz |
| 2006-2008 | Gruppenleiter, F&E, Borealis GmbH, Linz |
| 2008-2009 | Strategischer Einkaufsleiter, Polymere, Plastal GmbH, Weißenburg |
| seit 2009 | Gründungsgesellschafter und Geschäftsführer, TechMeter GmbH, Hagenberg |
| seit 2013 | Senior Researcher, Economica, Wien |
| 1979-1982 | Doctorate in law, Institute for Political Science, University of Göttingen |
| 1983-1990 | District Government of Brunswick |
| 1990-2005 | Ministry of Environment, Lower Saxony, Germany |
| since 2005 | Head, Directorate for Water Management and Resource Conservation, German Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety, Bonn |
| 2014-2017 | President, ICPE International Commission for the Protection of the Elbe River, Magdeburg |
| 1981-1989 | Studium der Handelswissenschaften an der Wirtschaftsuniversität Wien, Abschluss Mag.rer.soc.oec. |
| 1989 | Revisionsassistent, Danubia Wirtschaftstreuhandgesellschaft mbH |
| 1989-1990 | Erstellung einer Studie "Ökosteuern" im Auftrag des Bundesministeriums für Umwelt, Jugend und Familie |
| 1990-1994 | Stellvertretender Leiter der Abteilung Umweltökonomie und Energie, Bundesministerium für Umwelt, Jugend und Familie |
| 1994-1999 | Umweltattaché, Ständige Vertretung Österreichs bei der EU, Brüssel |
| 1998 | Vorsitzender der Arbeitsgruppe Umwelt des Rates der EU während der österreichischen Präsidentschaft |
| seit 1999 | Geschäftsführer, Umweltbundesamt Gesellschaft mit beschränkter Haftung |
| seit 2002 | Alleingeschäftsführer |
| 1980-1987 | Studies, Technical Physics, Vienna University of Technology |
| 1987-1989 | Assistant Professor, General Physics Institute, Vienna University of Technology |
| 1989-1994 | Unit I/3, Environmental Research and Technology, Austrian Federal Ministry for the Environment, Vienna |
| 1993-1994 | Head, Subunit I/3b, Environmental Research, Austrian Federal Ministry for the Environment, Vienna |
| 1994-1996 | Head, Unit I/2 - Environmental Technology, Austrian Federal Ministry for the Environment, Vienna |
| since 1996 | Head, Unit V/7 - Environmental Management and Technology, Austrian Federal Ministry for the Environment, Vienna |
| 1994-2001 | Principal Administrator for the Environment, Austrian Federal Ministry of Agriculture, Forestry, Environment and Water Protection, Vienna |
| 2001-2009 | Economic Advisor on Environmental and Nuclear Topics, Permanent Representation of Austria to the OECD, Paris |
| since 2010 | Department Environmental Protection at Company Level and Technology, Austrian Federal Ministry of Agriculture, Forestry, Environment and Water Protection, Vienna |
