Matthias Ilg

Expertise Mathias advises Experience Highlights Career History

Partner, Austria

Construction & Dispute Resolution

+49 30 220 131 000

Expertise

Mathias specialises in advising and representing companies and entrepreneurs in commercial and civil law matters. His work ranges from strategic contract drafting and ongoing legal advice to the enforcement and defence of claims in court. A particular focus of his practice is construction and construction contract law, including the legal support of complex projects. Mathias advises clients on contract drafting, claims and  ariation management, as well as warranty, damages and liability matters. Drawing on his background in both law and strategic management,

Mathias combines legal clarity with commercial insight and a pragmatic approach. He develops solutions that are legally sound while also reflecting his clients’ commercial objectives and practical requirements.

Mathias advises

  • construction and construction contract law
  • complex construction and infrastructure projects
  • claims and variation management
  • warranty, damages and liability matters
  • litigation and dispute resolution
  • contract drafting and negotiation
  • collaborative project delivery
  • general commercial and civil law matters
  • real estate transactions

Experience Highlights

  • Extensive experience advising and representing companies and joint ventures in complex construction and infrastructure projects.
  • Providing ongoing legal support to technical building services joint ventures on several major public sector construction projects.
  • Advising and representing parties in connection with a complex tunnel construction project, particularly on construction contract claims and project delivery matters.
  • Advising a joint venture in connection with a major bridge construction project.
  • Advising design and engineering firms on sophisticated building projects in Austria and abroad, including commercial, cultural and event venues.
  • Advising an international joint venture on a cross-border education and innovation project.
  • Advising on construction and design contracts, claims and variation management, and warranty, damages and liability matters.
  • Enforcing and defending claims in court and through out-of-court dispute resolution.- Regularly publishing on current developments in construction, construction contract and commercial law.

Career History

Previous Firms

  • Since August 2025: Lawyer, ilglaw, Vienna
  • March 2016 – July 2025: Lawyer, trainee lawyer and legal associate, Müller Partner Rechtsanwälte GmbH, Vienna
  • December 2014 – April 2015: Judicial trainee, Vienna Higher Regional Court
  • September 2015: Legal intern, E+H Attorneys-at-Law, Vienna
  • June 2015 – August 2015: Legal intern, RPCK Rastegar Panchal, Vienna
  • July 2013: Legal intern, Schoenherr Attorneys at Law, Vienna

Memberships

  • KOO.Bau
  • Vienna Bar Association

Education

  • Mag. iur. in Law, University of Innsbruck, 2015
  • Master of Science (MSc) in Strategic Management, University of Innsbruck, 2013
  • Bachelor of Science (BSc) in Management and Economics, University of Innsbruck, 2011

Publications

  • The Future of Construction Project Delivery – Collaborative Construction, multi-part series, 2025
  • Austrian Supreme Court Clarifies Dispute over Additional Costs, 2025
  • EU Supply Chain Legislation, three-part series, 2024
  • Early Contractor Involvement (ECI), three-part series, 2024
  • Recent Austrian Supreme Court Case Law on Additional-Cost Claims – Practical Implications, 2023
  • Liability in Construction, three-part series, 2023
  • Additional-Cost Claims Arising from Disrupted Construction Processes – An Interim Assessment, 2018

 

 

 

Mathias is a partner in gunnercooke GmbH, whose registered office is Kurfuerstendamm 15, 10719 Berlin, AG Charlottenburg, HRB 224488 B. All lawyers of gunnercooke GmbH are admitted either in Germany or Austria to practise as Rechtsanwalt or Rechtsanwaeltin and are members of and regulated by the relevant local Bar (Rechtsanwaltskammer).

Expertise

Back to top

Mathias specialises in advising and representing companies and entrepreneurs in commercial and civil law matters. His work ranges from strategic contract drafting and ongoing legal advice to the enforcement and defence of claims in court. A particular focus of his practice is construction and construction contract law, including the legal support of complex projects. Mathias advises clients on contract drafting, claims and  ariation management, as well as warranty, damages and liability matters. Drawing on his background in both law and strategic management,

Mathias combines legal clarity with commercial insight and a pragmatic approach. He develops solutions that are legally sound while also reflecting his clients’ commercial objectives and practical requirements.

Mathias advises

Back to top
  • construction and construction contract law
  • complex construction and infrastructure projects
  • claims and variation management
  • warranty, damages and liability matters
  • litigation and dispute resolution
  • contract drafting and negotiation
  • collaborative project delivery
  • general commercial and civil law matters
  • real estate transactions

Experience Highlights

Back to top
  • Extensive experience advising and representing companies and joint ventures in complex construction and infrastructure projects.
  • Providing ongoing legal support to technical building services joint ventures on several major public sector construction projects.
  • Advising and representing parties in connection with a complex tunnel construction project, particularly on construction contract claims and project delivery matters.
  • Advising a joint venture in connection with a major bridge construction project.
  • Advising design and engineering firms on sophisticated building projects in Austria and abroad, including commercial, cultural and event venues.
  • Advising an international joint venture on a cross-border education and innovation project.
  • Advising on construction and design contracts, claims and variation management, and warranty, damages and liability matters.
  • Enforcing and defending claims in court and through out-of-court dispute resolution.- Regularly publishing on current developments in construction, construction contract and commercial law.

Career History

Back to top

Previous Firms

  • Since August 2025: Lawyer, ilglaw, Vienna
  • March 2016 – July 2025: Lawyer, trainee lawyer and legal associate, Müller Partner Rechtsanwälte GmbH, Vienna
  • December 2014 – April 2015: Judicial trainee, Vienna Higher Regional Court
  • September 2015: Legal intern, E+H Attorneys-at-Law, Vienna
  • June 2015 – August 2015: Legal intern, RPCK Rastegar Panchal, Vienna
  • July 2013: Legal intern, Schoenherr Attorneys at Law, Vienna

Memberships

  • KOO.Bau
  • Vienna Bar Association

Education

  • Mag. iur. in Law, University of Innsbruck, 2015
  • Master of Science (MSc) in Strategic Management, University of Innsbruck, 2013
  • Bachelor of Science (BSc) in Management and Economics, University of Innsbruck, 2011

Publications

  • The Future of Construction Project Delivery – Collaborative Construction, multi-part series, 2025
  • Austrian Supreme Court Clarifies Dispute over Additional Costs, 2025
  • EU Supply Chain Legislation, three-part series, 2024
  • Early Contractor Involvement (ECI), three-part series, 2024
  • Recent Austrian Supreme Court Case Law on Additional-Cost Claims – Practical Implications, 2023
  • Liability in Construction, three-part series, 2023
  • Additional-Cost Claims Arising from Disrupted Construction Processes – An Interim Assessment, 2018

Back to top

 

 

 

Mathias is a partner in gunnercooke GmbH, whose registered office is Kurfuerstendamm 15, 10719 Berlin, AG Charlottenburg, HRB 224488 B. All lawyers of gunnercooke GmbH are admitted either in Germany or Austria to practise as Rechtsanwalt or Rechtsanwaeltin and are members of and regulated by the relevant local Bar (Rechtsanwaltskammer).