Unser Team

Dieter Thalhammer

Partner – Area: Competition Law, Compliance & Internal Investigations

Dieter Thalhammer is a partner in our Vienna office and head of our competition law practice group. Dieter is one of the leading Austrian experts in national and European competition law and represents national and international clients in merger control proceedings, cartel, and abuse of dominance cases, as well as in cartel damages proceedings (private enforcement). He also has extensive experience conducting internal investigations and implementing antitrust compliance programs.

Under his guidance, our competition law practice group evolved into one of the leading teams in Austria. Dieter represents clients from diverse industries such as transport, automotive, media, energy, postal services, telecommunications, the chemical industry, real estate, finance, health care as well as the food industry and the electronic engineering industry. His most recent cases comprise advising a client in cartel proceedings concerning transport before the European Commission.

Dieter represented clients before the Austrian Supreme Court of Justice and the European Court of Justice in the proceedings against the Austrian freight forwarding cartel. Furthermore, he advises an energy supply company in antitrust proceedings before the Austrian Cartel Court and regularly counsels prestigious Austrian and international companies in several Austrian and European merger proceedings.

Prior to joining our firm, he worked for a leading international law firm in Vienna for six years. He started his career as an intern at the Legal Service of the European Commission. Dieter is the author of several articles on competition law and lectures at the University at Graz.

Dieter holds law degrees from the University of Vienna (Dr iur, Mag iur) and the Saarland University (LLM Eur). He speaks German and English.


“He has a very high level of knowledge and a good network, and acts proactively.”
Chambers Europe 2021

“Leading Individual”
Legal500 2020

“He is extremely skilled, solution-oriented and experienced. He is a great leader with an incomparable feel for how to approach authorities and how to get the best bargaining result. His hands-on approach is the key: if there is a problem he names it and tackles it.”
Chambers & Partners 2020

“Leading Individual”
JUVE 2019

“Leading Individual”
Legal500 2019

“excellent in managing his team and presenting complex questions in an understandable way to management and the board” (Client)
Chambers & Partners 2019

“Very experienced and highly qualified” & “all the assets I would seek for in competition law.”
Chambers & Partners 2018


  • Thalhammer, Kartellrechtsreform wird Kronzeugen abschrecken, Der Standard 6.3.2017
  • Thalhammer, Kartellrecht: Novelle von Ministerrat beschlossen, Die Presse 2.3.2017
  • Feldner/Thalhammer, Hausdurchsuchungen durch die BWB und die Bedeutung des Untersuchungsgegenstands, ecolex 2016, S. 892-895
  • Feldner/Thalhammer, Die Hausdurchsuchung im Kartellrecht, Manz Verlag Wien, 09/2016
  • Thalhammer/Feldner, Chapter: Austria, in The Essentials of Merger Review, American Bar Association (2013)
  • Thalhammer/Feldner, EU Competition Law and the Energy Sector 2012, in The European Antitrust Review 2013
  • Thalhammer/Zellhofer, Getting the Deal Through: Intellectual Property & Antitrust (Austria), Global Competition Review, 2010 – 2011
  • Thalhammer/Feldner, EU Competition Law and the Energy Sector 2011: Time to Switch into Higher Gear, in The European Antitrust Review 2012 – a Global Competition Review special report
  • Thalhammer/Zellhofer, EuGH lässt Kronzeugen im Regen stehen, Wirtschaftsblatt 21.09.2011
  • Thalhammer/Feldner, Rätseln über das Anwaltsgeheimnis, Die Presse 2010/40/03
  • Thalhammer/Feldner, Dürfen Anwälte Kartelle ihrer Kunden verraten?, Die Presse 04.10.2010
  • Thalhammer/Offenbeck, Getting the Deal Through: Intellectual Property & Antitrust (Austria), Global Competition Review, 2009
  • Thalhammer, Modernisation in Europe 2005 – Austria (Getting the Deal Through)
  • Thalhammer, Die Rolle der Schiedsgerichte bei der Durchsetzung von EG-Kartellrecht unter dem Regime der VO 1/2003, wbl 2005, 62
  • Thalhammer, Int.A.L.R 2005 – News Section N-1
  • Thalhammer , Entscheidungsbesprechung zu 1 Ob 270/03t, ecolex 2004, 625
  • Thalhammer, Grundlegende  Fragen des Internationalen Zivilverfahrensrechts im Bereich von Forderungsexekution mit Auslandsbezug, Dissertation Wien 1996