• 2018–2019

    Assistance to Kongsberg Gruppen ASA in connection with its acquisition of Rolls-Royce Commercial Marine.

    Eivind headed the team at Thommessen that assisted Kongsberg Gruppen ASA on merger control aspects of its acquisition of Rolls-Royce Commercial Marine. The transaction required regulatory approvals from the European Commisson and several national regulators around the world.

  • 2016–2017

    Assistance to Kongsberg Gruppen in connection with its establishment of a joint venture with thyssenkrupp Marine Systems.

    Eivind Vesterkjær led the team that advised Kongsberg Defence & Aerospace in connection with the establishment of kta Naval Systems, a joint venture between Kongsberg and thyssenkrupp Marine Systems. kta Naval Systems will develop, produce and maintain combat systems as an exclusive supplier for submarines from thyssenkrupp Marine Systems.


  • 1999–
    Partner, Oslo office, Thommessen
  • 1996–1998
    Senior Associate, Oslo office, Thommessen
  • 1993–1995
    Associate, Oslo office, Thommessen
  • 1993
    Admitted to the bar
  • 1991–1993
    Deputy Judge, -, Sarpsborg city court
  • 1990–1990
    Associate, Oslo office, Thommessen


  • 1990–1991
    Diplôme d'Etudes Approfondies (DEA) de Droit Communautaire, Université de Paris II (Panthéon-Assas)
  • 1984–1989
    Candidate in Jurisprudence, University of Oslo