Clemens Ziegler

2009                LL.M. (Georgetown University Law Center, Washington DC, USA)

2009                Doctorate in Public International Law (Marburg University, Germany)

2005                 Second State Law Exam (State of Rhineland-Palatinate, Germany)

2003-2005     Practical Legal Training (Regional Court of Frankenthal, State of Rhineland-Palatinate, Germany, and Brussels, Belgium)

2003                 First State Law Exam (State of Bavaria, Germany)

1997-2003     Law degree (University of Würzburg, Germany, including accessory studies in European lawin Erasmus studies in Pavia, Italy (1999-2000))

• „Administrative Procedure“, chapter in: Hancher/Salerno/de Vries (Hrsg.), EU State Aids, 7. ed. (2026) (co-autor: Paul-John Loewenthal, European Commission, Legal Service).
• ‘From Litigation to Legislation: The Tempus Case & the Future of Demand-Side Resources’ Access in Europe’, contribution to energy law Seminar at Univ. of Bergen regarding ‘Gridlock in the Power Sector – What’s Holding Back Demand-Side Flexibility?’, Norway (18 Nov. 2025)
• „The EU’s Foreign Subsidy Regime – The First Year“, Fried Frank Insights (2024).
• Course taught: International Merger Control, Rome Business School (2023).
• „European Union Policy on Capacity Mechanisms“, in: Hancher u.a., Capacity Mechanisms in the EU Energy Markets: Law, Policy and Economics, 2. Auflage (2022)
• ‘The Decommissioning of Lignite- and Coal-Fired Power Plants in the Commission’s State Aid Practice and the European Green Deal‘ (2022) 21(3) European State Aid Law Quarterly 237 ff.
• ‘One Time, Last Time, Or Why the Commission’s Approval of the Romanian CE Oltenia Lignite Restructuring Aid Approval Makes For an Accident, Not a Precedent. Annotation on Commission Decision of 26.1.2022 on the State Aid SA.59974 – 2021/C (ex 2020/N, ex 20/PN) which Romania Partially Implemented for Complexul Energetic Oltenia SA’ (2022) 21 (2) European State Aid Law Quarterly 181 ff.
• ‘The British Aggregates saga – Looking back at an earlier stage of the selectivity discussion’, chapter contributed to Caroline Buts, José Luis Bendía Sierra (eds), Milestones in State Aid Case Law. EStAL’s First 15 Years in Perspective, December 2017, as well as for the second Milestones edition, EStAL’s First 20 Years in Perspective 2022
• ‘Energy transition – the Commission’s State aid decisions on the Dutch and German coal phase-out laws‘, podcast series recorded for the Energy Union Law series of the Florence School of Regulation (“FSR“), June and July 2021 (co-recorded with Cecilia Borelli — Episode 1 (Dutch coal exit), Episode 2 (German hard coal tender mechanism) and Episode 3 (Formal investigation procedure into German lignite compensations))
• ‘Administrative Procedure’, chapter contributed to Leigh Hancher, Francesco Maria Salerno & Yvo de Vries (eds.), EU State Aids, 6th edition, April 2021 (co-authored with Paul-John Loewenthal)
• ‘COVID – 19 Temporary State Aid Framework’, podcast recorded for the Energy Union Law series of the Florence School of Regulation, April 2020
• Participating in panel titled ‘Capacity mechanisms under scrutiny’ at the Energy Community’s conference on Competition Law in the Energy Sector, Vienna, December 2018
• Participating in panel titled ‘State Aid Hot Topics’ in FSR’s workshop on Competition Law and the Energy Sector, Brussels, October 2018
• Speaking at 100th Lunch-Talk of GCLC – Global Competition Law Centre, Brussels, in a Panel on Antitrust and merger control law in times of Brexit, Brussels, May 2018
• ‘The Treaty State Aid Framework – Friend or Foe in the Energy Transition?’ (online lecture in FSR’s summer programme, titled Unpacking the Legal Content of the Clean Energy Package, May 2018)
• ‘What are the Consequences of Brexit on Competition Law and Policy Enforcement?’ at FSR workshop The Impact of Brexit on the UK and European Energy Markets, London, April 2018
• ‘What is State Aid?’ and ‘Germany’, chapters contributed to Leigh Hancher, Adrien de Hautecloque, Francesco Maria Salerno, State Aid and the Energy Sector, February 2018 (co-authored with Dr Falk Schöning)
• ‘New issues in EU Security of Gas Supply’. Moderating a Session at the Florence School of Regulation’s EU Energy Law and Policy Workshop, Berlin, February 2016
• ‘The European Commission’s Extension of the Liner Shipping Consortia Block Exemption Regulation until April 2020’, Journal of European Competition Law & Practice (JECLAP) 2014 (co-authored with Matthew Levitt)
• ‘Getting the Deal Through When Time is of the Essence. Antitrust Strategies for Time Sensitive Transactions’, in: ABA, Section of Antitrust Law, The Threshold, Newsletter Of The Mergers & Acquisitions Committee, Spring 2010 (co-authored with Gregory M. Sergi)
• ‘Humanitarian Intervention and Pretexts for War. A Critique of Ryan Goodman, 100 Am. J. Int’l L. 107 (2006)’, in: 5 Hanse Law Review, No. 2 (December 2009), 175 ff. — abstract available here, full text available here.
• ‘Kosovo-Krieg der Nato 1999 und Irak-Krieg 2003. Völkerrechtliche Untersuchung zum universellen Gewaltverbot und seinen Ausnahmen’, published in Schriften zum Staats- und Völkerrecht, 2009, Title in English: ‘NATO’s Kosovo War 1999 and Iraq War 2003. Analysis in Public International Law Regarding the Prohibition on the Use of Force and its Exceptions’