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 > Construction

CMS Reich-Rohrwig Hainz Rechtsanwälte GmbH handles the full remit of construction law, including associated real estate and public law matters, and is equally well placed to guide clients through sector-specific disputes. Its contentious work covers litigation and arbitration and is underpinned by team head Nikolaus Weselik‘s additional experience as an arbitrator. In the non-contentious space, the team routinely advises developers, investors, employers and construction companies on construction contracts and various project development-related issues as well as subsequent real estate transactions. While hotel sector work constitutes an area of particular expertise, translating into regular instructions from hotel operators and owners, the team has also been active in various other sectors including residential, logistics, retail, telecoms, infrastructure and energy. Thomas Hamerl is the key contact for infrastructure projects and PPPs.

Austria > Public procurement

A leading practice in the public procurement sphere, CMS Reich-Rohrwig Hainz Rechtsanwälte GmbH advises clients on the full spectrum of procurement procedures and related litigation, with particular strengths in the healthcare and infrastructure sectors. National and large cross-border PPP projects form part of the team’s portfolio. Construction, TMT, transport, and waste management are other areas where the firm is routinely active. Bernt Elsner is the global head of the CMS public procurement practice group and has longstanding experience in matters including tender proceedings, procurement litigation and compliance. Robert Keisler and Thomas Hamerl are also noted for their expertise in this area.

Austria > Projects and energy

Clients from the public sector, private investors, development companies, banks and financial institutions regularly instruct CMS Reich-Rohrwig Hainz Rechtsanwälte GmbH on questions of energy, climate change, infrastructure, and projects. The firm’s infrastructure and projects group and the energy and climate change group collaborate to jointly work on matters in this area. The practice advises on the full range of project development with a particular focus on social infrastructure, renewable energy as well as life sciences and healthcare, among others. Property and construction law specialist Nikolaus Weselik, energy and climate change expert Thomas Hamerl, and public procurement head Bernt Elsner are the key contacts.