Dr Thomas Trettnak > Cerha Hempel > Vienna, Austria > Lawyer Profile

Cerha Hempel

Work Department

Corporate & Commercial


Areas of practice:


Admitted 2005, (Attorney at Law), Austria
Admitted 2003, (Attorney at Law), New York

  • Guest lecturer in Mergers & Acquisitions at the Vienna University of Economics and Business
  • Secondment at STRABAG SE, Capital Markets & M&A, Compliance Officer (2007/2008)
  • Goldberg, Gelman & Harnik, New York (2002)
  • Cremades & Sánchez Pintado, Madrid (1999)

Thomas is Partner at CERHA HEMPEL since 2010 and with the law firm since 2004. He is Head of CEE Insolvency & Restructuring Practice, concentrating in mergers and acquisitions and corporate reorganizations with a special focus on insolvency & restructuring, as well as venture capital and private equity mandates. Thomas is particularly renowned for cross-border transactions, often for Anglo-Saxon clients in view of his admission to the New York Bar. ​ He has worked in-house in M&A for a listed construction company. Thomas is a guest lecturer in Mergers & Acquisitions at the Vienna University of Economics and Business.


German, English, French, Spanish, Basic knowledge of Russian


  • Vienna Bar Association
  • International Bar Association
  • AVCO – Austrian Private Equity and Venture Capital Organisation
  • New York Bar Association
  • American Bar Association
  • Lex Mundi – The World’s Leading Association of Independent Law Firms


Secondment at STRABAG SE, Capital Markets & M&A, Compliance Officer (2007/2008)
University of Graz (Mag. iur. 1999, Dr. iur. 2003)
Goldberg, Gelman & Harnik, New York (2002)
Kellogg School of Management, Master’s Degree in Business Administration (2001)
Cremades & Sánchez Pintado, Madrid (1999)
Northwestern University School of Law (LL.M. 2001)
Universidad de Alcalá, Madrid (1998-1999)

Lawyer Rankings

Austria > Commercial, corporate and M&A

Cerha Hempel‘s highly regarded corporate practice advises on national and international cross-border mergers, reorganisations and restructurings. In public M&A, the team acts for numerous companies listed on the stock exchange, and the group’s private M&A work focuses on providing strategic advice to private equity investors in Austria and CEE. A standout feature of the practice is its Brazilian desk, which is led by Heinrich Foglar-Deinhardstein. Albert Birkner, who is ‘one of the leading M&A and corporate lawyers in Austria‘, Clemens Hasenauer, who is praised for his ‘outstanding legal knowledge and ability as well as negotiation skills‘ and Thomas Trettnak jointly lead the practice.

Austria > Projects and energy

Cerha Hempel assists with projects and energy work by leveraging multiple departments throughout the firm. The practice is particularly singled out for its expertise in energy M&A, which is handled by Clemens Hasenauer and Johannes Aehrenthal in the corporate transactions team; in recent highlights, the group advised OMV on its purchase of a stake in an oil refining company and acted on General Electric’s sale of its distributed power business. Public law group head Hans Kristoferitsch leads on regulatory matters and represented the Republic of Austria in several state aid cases. Real estate and construction leader Peter Vcelouch acted for Lidl on several construction projects. Georg Konrad and Thomas Trettnak also contribute to the practice.

Austria > Insolvency and corporate recovery

(Leading individuals)

Thomas TrettnakCerha Hempel

The team at Cerha Hempel has strength in assisting national and international clients with pre-insolvency debt collection and acts for clients including Johnson Controls, BDO Group and Whirlpool Corporation. Other work undertaken by the practice includes advising the shareholders of distressed or insolvent companies, and representing clients in insolvency proceedings. Practice head Thomas Trettnak and senior associate Christoph Reiter, who focuses on corporate and commercial distressed M&A, are recommended for ‘trying to understand the holistic situation‘ and then ‘adapt their advice to the specific situation described‘. Another key name to note is Heinrich Foglar-Deinhardstein.