Mathias Thorshaug Rengård - Permisjon

  • Ansatte
  • Senioradvokater

Mathias Thorshaug Rengård works in several legal disciplines, but has his main focus within tort law and family, inheritance and probate law. He has a significant number of procedural assignments for the court.

Mathias works a lot with cases involving children, and assists many parents in connection with drafting parental cooperation agreements after break-ups and parental disputes before the court. He has special expertise in cases with an international character, where special questions about jurisdiction, choice of law and the use of international conventions arise. Typically, these are child abduction cases, cases where the parents live in different countries and implementation of agreements/decisions across national borders.

Mathias assists with, among other things, inheritance settlement, creation of a will and power of attorney for the future. He also regularly works together with estate administrators for public transfer of deceased estates on behalf of the Oslo District Court. Within tort law, it is personal injury compensation that Mathias works with in particular. He takes on all types of personal injury cases, and is often assigned as a solicitor.

Legal areas
Family, inheritance and probate law
International family law
Compensation and insurance law
Administrative law
Procedure and other dispute resolution



  • 2022 - Present
  • Senior lawyer
  • Langseth Advokatfirma DA
  • 2020 - 2022
  • Lawyer
  • Langseth Advokatfirma DA
  • 2018 - 2020
  • Legal representative
  • Langseth Advokatfirma DA
  • 2016 - 2018
  • Adviser
  • Norwegian patient injury compensation (NPE)
  • 2013 - 2016
  • Trainee
  • Lawyers Smith, Jentoft, Simonsen MNA


  • 2015 - 2015
  • Master's in jurisprudence
  • Universitetet i Tromsø, Norges arktiske universitet


  • 2015 - 2015
  • Master's thesis in mental health care (the conditions for compulsory hospitalization)


  • -
  • Author for Karnov Group Norway
  • Legal commentary, the Alcohol Act and the Serving Act