Mag Thomas Hamerl > CMS Reich-Rohrwig Hainz Rechtsanwälte GmbH > Vienna, Austria > Lawyer Profile

CMS Reich-Rohrwig Hainz Rechtsanwälte GmbH
1010 WIEN

Work Department

Insfrastructure & Projects, Energy & Climate Change, Real Estate & Construction


Thomas Hamerl is an attorney-at-law for infrastructure projects & public private partnerships and a leading expert in public procurement law as well as real estate & construction. He is a specialist for national and international construction projects, infrastructure and public private partnerships as well as energy projects. He has particular expertise in national and international construction contract law, public procurement law including concessions, infrastructure-oriented dispute resolution including litigation and arbitration, real estate and energy law.

Thomas Hamerl has experience in infrastructure projects for roads, railways, airports, hospitals, schools, waste collection and disposal, site remediation, power plants (PV, wind, biomass, water).

He has been working as a legal consultant for around 20 years and joined CMS in 2009. He brings to the consulting practice his experience as in-house counsel of an international construction group, where he was head of the legal department in Vienna and head of the group-wide “Legal Practice Group PPP”. Prior to that, he worked for renowned Viennese law firms in Austria and Central and Eastern Europe as well as for the European Commission in Brussels.


European Commission (1997-1998), two highly recommended Austrian Law firms (1998 – 2008), STRABAG (2008 – 2009), CMS Reich-Rohrwig Hainz since 2009.


English, German


  • ÖGEBAU (Austrian Society for Construction Law)
  • ArbAut (Austrian Arbitration Association)
  • Management Club
  • Club Cuvée


University of Vienna School of Law (Mag.iur. 1995).

Lawyer Rankings

Austria > Projects and energy

The group at CMS Reich-Rohrwig Hainz Rechtsanwälte GmbH works across the energy sector, and has recently been highly active in mandates relating to transport and renewable energy. Bernt Elsner leads the firm’s public procurement group, while Thomas Hamerl leads the energy and climate change sector group. Construction law expert Nikolaus Weselik completes the roster of key contacts at leadership level. The group is consequently able to operate as a cross-practice team with a broad offering, as well as a targeted national team with deep sector knowledge.

Austria > Public procurement

The group at CMS Reich-Rohrwig Hainz Rechtsanwälte GmbH is particularly prolific when it comes to PPP projects and work in the infrastructure and healthcare sectors, and the team is lauded for its ability to handle complex procurement projects. Practice head Bernt Elsner is referred to by one client as ‘the mastermind behind the well-coordinated team‘, and often works on contentious issues stemming from public procurement matters. On the regulatory side, Robert Keisler and Thomas Hamerl are the key names to note.

Austria > Administrative law and public sector

CMS Reich-Rohrwig Hainz Rechtsanwälte GmbH focuses on providing advice at the intersection of public and commercial law, assisting energy and pharmaceuticals clients with matters ranging from trade and EU state aid work to regulatory and construction mandates. The practice routinely represents clients before the state and federal administrative courts in addition to the constitutional court and has been involved in complex litigation in relation to the Austrian government’s Covid policies. Public procurement, EU and antitrust law specialist Bernt Elsner and public commercial law expert Robert Keisler lead the practice, while Thomas Hamerl is responsible for energy and construction law matters in addition to public procurement work.

Austria > Construction

Nikolaus Weselik heads up both the real estate group and the construction group at CMS Reich-Rohrwig Hainz Rechtsanwälte GmbH. Leading the group alongside Thomas Hamerl, Weselik is an active team member when it comes to litigious matters and an experienced arbitrator. Hamerl, whose fields of expertise lie in national and international construction, infrastructure and energy projects, often acts for clients before domestic and international courts and arbitral tribunals. The team has particular nous in the hotel industry, and also excels in responding to client’s tax questions related to construction projects.